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Tropical Hepato-Gastroenterology - E-Book

Tropical Hepato-Gastroenterology - E-Book

B. N. Tandon

(2012)

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Book Details

Abstract

Medicine, in terms of both disease pattern and therapeutic practices, shows tremendous geographical variation. Data and recommendations from different socioeconomic settings may not correctly reflect picture at home. There is no existing book devoted to the discipline of tropical hepatogastroenterology from India and this book fulfills this need. It emphasizes on medical management of hepatic and gastric diseases relevant to the tropics. The strength of this book is greater focus on practical management of gastrointestinal diseases in the tropics. It is edited by Dr BN Tandon, who is regarded as the Father of Tropical Gastroenterology in India.

    • The book is divided into ten parts: esophagus, stomach, small bowel, large bowel, liver, liver failure, gallbladder and biliary tract, pancreas, pancreatic diseases, and special topics.
    • Each chapter extensively reviews epidemiology, etiopathogenesis, clinical features, diagnosis, medical treatment, and surgical treatment.
    • Chapters written by more than 50 leading authorities who have worked extensively with the tropical conditions that they have written about.
    • Focuses on clinical aspects of diseases important to the tropics.
    • Addresses digestive diseases as a discipline rather than as a medical or surgical specialty.
    • Provides management of specific clinical situations that are encountered in developing countries.

Table of Contents

Section Title Page Action Price
Front Cover Front Cover
Front Matter i
Copyright iv
Preface v
Acknowledgments vii
Contributors ix
Contents xiii
Part I Esophagus 1
Chapter 1 - Cancer of the Esophagus 3
Introduction 3
Epidemiology 3
Incidence and Prevalence 3
Dysplasia/Carcinoma Sequence 3
Risk Factors and Associations 4
Alcohol and tobacco 4
Dietary carcinogens 4
Nutritional deficiencies 4
Environmental factors and pollutants 5
Infections 5
Chronic esophageal irritation 5
Achalasia cardia 5
Corrosive strictures 6
Esophageal diverticula 6
Others 6
Barrett's metaplasia 6
Genetics of esophageal carcinoma 7
Pathology 7
Squamous Cell Carcinoma 7
Adenocarcinoma 8
Uncommon Subtypes 9
Prognostic Factors 9
Symptoms and Signs 9
Diagnostic Investigations 10
Barium Swallow 10
Endoscopy 11
Screening 11
Screening for Squamous Cell Carcinoma 12
Chapter 2 - Corrosive Injuries of the Esophagus and Stomach 39
Epidemiology 39
Pathophysiology51 39
Clinical Features 41
Investigations 40
Endoscopic Grading of Esophageal Lnjuries[34] 41
Coexistent Gastric Andesophageal Injury 42
Site of Stricture 42
Complications of Corrosive Injuries 42
Malignant Change 43
Mucocele of the Esophagus 43
Prevention of Complications 44
Acute Injuries and Initial Treatment 44
Corticosteroids 44
Stents 44
Dilatation 45
Surgical Treatment 46
Preoperative Preparation 46
Surgical Procedures for EsophagealStrictures 46
Surgical Choices and Procedure (Fig. 2.4) 47
Route of Transfer 48
Direction of Conduit 48
Type of Conduit 48
Stomach 48
Jejunum 48
Colon 48
Other procedures 49
High strictures 49
Corrosive Injuries of the Stomach 50
Chapter 3 - Gastroesophageal Reflux Disease 57
epidemiology 57
Etiopathogenesis 59
Functional Constituents of the Esophagogastric Junction 59
Transient Lower Esophageal Relaxations 61
Hiatal Hernia 62
Gastroesophageal Flap Valve 62
Clinical Features 64
Extraesophageal Presentations of GERD 64
Asthma and Gastroesophageal Reflux 65
Chronic Cough and GER 65
Laryngitis and GER 66
Diagnostic Evaluation 66
Differential Diagnosis 68
Management of GERD 68
Acid Suppressive Medications 69
Pro-motility Therapy 70
Maintenance Therapy 71
3.6.4 Nonerosive Gastroesophageal Reflux Disease 72
Management of Refractory GERD 72
Endoscopic Therapy for GERD 73
Surgical Therapy 74
Complications of GERD 75
Peptic Strictures 75
Barrett's Metaplasia, Dysplasia, and Adenocarcinoma 75
Pathophysiology 75
Histology 76
Management 76
Conclusion 77
Chapter 4 - Achalasia Cardia 82
Epidemiology 82
Etiopathogenesis 82
Clinical Features 83
Diagnosis 84
Radiological Examination 84
Endoscopic Examination 85
Manometric Examination 85
Differential Diagnosis 86
Treatment 86
Pharmacotherapy 87
Botulinum Toxin (BoTx) Injection 87
Pneumatic Dilatation 88
Surgical Myotomy 89
Transabdominal (open) cardiomyotomy 90
Transthoracic (open) cardiomyotomy 90
Thoracoscopic and laparoscopic approach 90
Should an antireflux procedure be done? 91
Part II Stomach 95
Chapter 5 - Peptic Ulcer Disease and I Nonulcer Dyspepsia 97
History 97
Pathophysiology 98
Acid Secretion 98
Duodenal ulcer 98
Gastric ulcer 98
H. pylori 98
Nonsteroidal Anti-inflammatory Drugs 99
Smoking 99
Genetic Factors 99
Clinical Course 99
Diagnostic Studies 100
Helicobacter Pylori and Peptic Ulcer Disease 100
Epidemiology 100
Diagnosis of H. pylori Infection 101
Treatment of H. pylori Infection 102
H. pylori and Nonulcer Dyspepsia 104
Nsaids 104
Refractory Ulcer 105
Evaluation of Refractory Ulcer 106
Therapy of Refractory Ulcer 106
Surgery for Refractory Ulcer 106
NONULCER DYSPEPSIA 106
Pathophysiology 107
Approach to a Patient with Dyspepsia 107
Therapy of NUD 108
SURGERY FOR PEPTIC ULCER DISEASE 108
Time Trends 108
Operations for Peptic Ulcer and its Complications[98,99] 107
Vagotomy and drainage 108
Gastric resection 109
Complications of Peptic Ulcer Requiring Surgery 109
Bleeding 110
Pyloric stenosis 110
Penetration 111
Chapter 6 - Benign Tumors Of The Stomach 116
Introduction 116
Classification 116
Gastric Polyps 116
Neoplastic polyps 116
Non-neoplastic polyps 117
Hyperplastic polyps 117
Fundic gland polyps 117
Management of gastric polyps 117
Leiomyomas 118
Management 119
Gastrointestinal Stromal Cell Tumors 119
Management 120
Gastric Endocrine Tumors 120
Well-differentiated gastric endocrine tumors 120
Management of well-differentiated gastric endocrine tumors 121
Poorly differentiated endocrine tumors (Neuroendocrine carcinomas) 122
Management of poorly differentiated endocrine tumors (Neuroendocrine carcinomas) 122
Lipomas 122
Management 123
Chapter 7 - Carcinoma of the Stomach 126
Epidemiology 126
Etiology 126
Genetic Factors 127
Precursor Lesions 127
Gastric polyps 127
Autoimmune gastritis 127
Intestinal Metaplasia 127
Multifocal Atrophic Gastritis 128
Prior Gastrectomy 128
Gastric ulcer 128
Environmental Factors 128
Helicobacter pylori 128
Dietary factors 129
Smoking 129
Ionizing radiation 129
Epstein Barr virus infection 129
Occupation 130
Pathogenesis 130
Molecular Biology of Gastriccancer 130
Tumor Suppressor Genes 131
Proto-oncogenes and Other Molecular Changes 131
Pathology 133
Early Gastric Cancer 133
Advanced Gastric Cancer 134
Borrmann's classification 134
Lauren classification (DIO classification) 134
WHO classification 135
Mulligan classification 136
Ming classification 136
Goseki classification 136
Patterns of Gastric Cancer Spread 136
Direct spread 136
Lymphatic spread 137
Hematogenous spread 137
Transcoelomic spread 137
Clinical Features 137
Persistent Indigestion 137
Insidious Onset 137
Obstructive Symptoms 138
Latent Presentation 138
Peptic Ulcer Symptoms 138
Lump 138
Paraneoplastic Syndromes 138
Staging of Gastric Cancer 138
TNM System 138
Japanese Staging System 139
Work Up of a Case of Gastric Cancer 139
Gastroduodenoscopy and Barium Meal Examination 139
Transcutaneous Ultrasonography 139
Contrast Enhanced Computed Tomography (CECT) 139
Endoscopic Ultrasound (EUS) 141
Other Investigations 141
Diagnostic Staging Laparoscopy andLaparoscopic USG (LUS) 141
Other Laboratory Investigations 142
Management 142
Early Gastric Cancer 142
Advanced Gastric Cancer 143
Adjuvant Treatment 145
Part III Small Bowel 153
Chapter 8 - Tropical Malabsorption 155
Introduction 155
Definition 155
Epidemiology 156
Endemic Areas 156
Age and Gender Predisposition 156
Predisposing Factors 157
Epidemics of Tropical Sprue 157
Changing Trends 157
Pathogenesis 157
Infective Hypothesis 158
Nutritional Theory 158
Genetic Hypothesis 159
Unifying Hypothesis 159
Pathology 159
Clinical Features[1,5] 161
Investigations And Diagnosis 161
Differential Diagnosis 163
Treatment 164
Supportive Therapy 164
Specific Therapy 164
Prognosis 164
Future Directions 165
Chapter 9 - Infections of the Small Bowel 167
Bacterial Infections (Including Bacterial Food Poisoning) 167
Staphylococcus aureus Infections 167
Clinical features 167
Bacillus cereus 168
Clostridium perfringens 168
Part IV Large Bowel 195
Chapter 10 - Management of Ulcerative Colitis 197
Introduction 197
Diagnosis 197
Treatment of Ulcerative Colitis 199
Treatment of Ulcerative Colitis 200
Corticosteroids 200
Immunosuppressants 200
Azathioprine and 6-mercaptopurine 200
Cyclosporins 201
Antibiotics 201
Heparin 201
Probiotics 202
Other Drugs 202
Biological Agents 202
Management Guidelines for Ulcerative Colitis 203
Assessment of Disease Activity 203
Assessment of Extent of the Disease 203
Active Distal Ulcerative Colitis 204
Active Mild to Moderate Left Sided or Extensive UC 204
Severe Ulcerative Colitis (Table 10.2) 205
Maintenance of Remission 206
Maintenance Therapy-How Long? 206
Surgery for Ulcerative Colitis 206
Pouchitis 209
Management During Pregnancy 209
Nutrition 209
Management of Extra-Intestinal Manifestations 209
Conclusions 209
Chapter 11 - I Benign Colorectal Tumors 213
Introduction 213
Epidemiology 213
Classification 214
Hyperplastic Polyps 214
Adenomas 214
Polyposis Syndromes 215
Pathophysiology of FAP 215
Epidemiology of FAP 216
Natural history of FAP 216
Juvenile Polyps 216
Clinical Presentation 217
Diagnosis 217
Imaging 217
Endoscopy 217
Medical Management 218
Surgical Options 218
Polypectomy 218
Colonic Resection (Fig. 11.2) 218
Prognosis 219
Chapter 12 - Malignant Colorectaltumors 221
Introduction 221
Epidemiology 221
Etiopathogenesis 222
Genetic Changes 222
Hereditary Syndromes and Predisposing Conditions 223
Familial adenomatous polyposis 223
Hereditary nonpolyposis colorectal cancer 224
Adenomatous polyps (Adenomas) 225
Inflammatory bowel disease 225
Environmental Factors 225
Role of diet 225
Role of drugs 227
Lifestyle factors 227
Screening for Colorectal Neoplasia 227
Fecal Occult Blood Testing 227
Endoscopic Screening Tests 228
Flexible sigmoidoscopy 228
Colonoscopy 228
Emerging Technologies for Screening 228
Diagnosis 228
Clinical Features 228
Tumor Spread, Staging, and Prognosis 229
Stage A (T1N0M0) 229
Stage B 230
Stage C 230
Stage D 230
Carcinoembryonic Antigen 231
Management 231
Scope of Surgery 231
Laparoscopic Surgery forColorectal Cancer (LSCRC) 233
Radiation Therapy 233
Chemotherapy 233
Adjuvant Chemotherapy 234
Comparative trials 234
Neoadjuvant chemotherapy 234
Neoadjuvant chemoradiation 235
Endoscopic Palliation 235
Postoperative Surveillance 235
Management of Less Common Tumors of the Colon and Rectum 236
Part V Liver 241
Chapter 13 - JAUNDICE IN THE INFANT 243
Unconjugated Hyperbilirubinemia 243
Physiological Jaundice of the Newborn 243
Hemolytic Anemia 243
Breast Milk Jaundice 244
Hypothyroidism 244
Gilbert's Syndrome 244
Crigler-Najjar Syndrome 245
Conjugated Hyperbilirubinemia 245
Physiological Cholestasis[7] 246
Neonatal Cholestasis 246
Neonatal Liver Failure 246
Diagnostic evaluation 247
Neonatal Hemochromatosis 247
Neonatal Cholestasis without Liver Failure 248
Approach to neonatal cholestasis 249
Treatment 250
Biliary Atresia 251
Neonatal Hepatitis 252
Intrauterine Infections 253
Bile Duct Paucity 253
Alagille syndrome (syndromic form of bile duct paucity) 254
Nonsyndromic forms of familial bileduct paucity 255
Progressive familial intrahepaticcholestasis 1 (PFIC 1) or Byler's disease 255
Progressive familial intrahepaticcholestasis 2 (PFIC 2) 256
Progressive familial intrahepaticcholestasis 3 (PFIC 3) 256
Alpha 1 antitrypsin deficiency 256
Galactosemia 257
Miscellaneous Conditions 259
Conclusion 259
chapter 14 - Hepatitis Viruses: Virology and Epidemiology 261
Hepatitis a Virus 261
Genomic Organization 261
chapter 15 - Virological Diagnosis of Hepatitis 269
Acute Viral Hepatitis 269
Hepatitis A 269
Hepatitis B 270
Hepatitis C 270
Hepatitis D 271
Hepatitis E 272
Non-A-to-G Hepatitis 272
Chronic Hepatitis 272
Hepatitis B 273
Hepatitis C 274
Hepatitis D 275
HGV and TTV 275
chapter 16 - Hepatitis A Infection 277
Virus Characteristics 277
Spread of the Virus 277
Incubation Period 278
Epidemiology 278
Pathogenesis 278
Clinical Features 278
Anicteric Infection 278
Acute Hepatitis 279
Acute Hepatic Failure 279
Prolonged Cholestasis 280
Laboratory Features 280
Diagnosis 280
Treatment 280
Diet 280
Bed Rest 281
Ursodeoxycholic Acid 281
Alternate Medicine 281
Prevention 281
Preexposure Prevention 281
Postexposure Prophylaxis 282
Conclusions 283
Chapter 17 - Hepatitis B And Dvirus 286
Hepatitis Bvirus 286
History 286
Epidemiology 286
Transmission 287
Virology 287
Structure 287
Genome 288
Pathogenesis 288
Phases of HBV infection 289
Clinical Features 290
Acute infection 290
Serologic markers of HBV infection 291
Diagnostic algorithm 292
Chronic infection 293
Coinfection with hepatitis C virus or hepatitis D virus 297
Treatment of Hepatitis B 298
Interferon therapy 298
Interferon treatment for special groups 299
Nucleoside analogues 299
Other drugs 300
Hepatitis D Virus 301
Virology 301
Genome of HDV 301
Life cycle and replication ofHDV 301
Editing of HDV RNA and the two forms of HDAg 302
Epidemiology and Transmission 302
Pathogenesis 302
Diagnosis 303
Clinical Features 304
Treatment 305
Prevention 305
Medical therapy 305
Transplantation 305
Chapter 18 - Hepatitis C: an Indian Perspective 311
Introduction 311
Virology 311
Epidemiology 312
Transmission 312
Pathogenesis 312
Natural History 313
Clinical Manifestations 314
Acute and Chronic Infection 314
Extrahepatic Manifestations 314
Diagnosis 314
Prevention and Prophylaxis 315
Treatment 315
Goals of Therapy 315
Available Drugs (Table 18.2) 315
Efficacy 315
Predictors of Response to Therapy 316
Characteristics of Patients for whom Therapy is Widely Accepted 316
Characteristics of Persons forwhom Therapy should beIndividualized 317
Characteristics of Persons forwhom Therapy is CurrentlyContraindicated 317
Adverse Effects 317
Recommended Threshold for Drug Dose Reduction in Patients with IFN and Ribavirin for Chronic Hepatitis C 317
Indian Data (Fig. 18.5) 317
Treatment of Special Patient Groups[18] 318
Nonresponders and partial responders 318
HIV coinfected persons 318
Persons with renal disease 318
Persons with solid organ transplantation 318
Persons with decompensated cirrhosis 318
Persons with acute hepatitis C 319
Chapter 19 - Hepatitis E 321
Virology 321
Epidemiology 321
Geographical Distribution 321
Epidemiological Features (Table 19.1) 322
Transmission and Routes of Spread 322
Reservoirs of Infection 323
Seroprevalence Data 324
Clinical Features 324
Pathology 326
Pathogenesis 326
Diagnosis 326
Detection of HEV or HEV Components 327
Detection of Antibodies against HEV 327
Prevention and Treatment 327
Chapter 20 - Hepatic Drug Toxicity 330
Diagnosis of Drug Hepatotoxicity 331
Dechallenge 331
Indications of Liver Biopsy 332
Mechanisms of Drug Hepatotoxicity 333
Phase I Reactions 333
Phase II Reactions 333
Phase III Reactions 333
Classification of Hepatotoxins 334
Dose-dependent or intrinsic hepatotoxins 334
Dose-independent or idiosyncratic hepatotoxins 334
Hepatic Adaptation 335
Dose-dependent Hepatotoxicity 335
Clinicopathological Classification of Drug-Induced Liver Disease 336
Acute Hepatitis 336
Drug-induced Cholestasis 337
Acute drug-induced cholestasis 337
Chronic drug-induced cholestasis 338
Chronic Hepatitis 339
Steatosis 340
Acute microvesicular steatosis 340
Macrovesicular steatosis 340
Hepatic Fibrosis 340
Vascular Disorders 341
Neoplasms 341
Adenomas 341
Hepatocellular carcinoma 341
Management of Hepatic Drug Toxicity 342
Chapter 21 - Toxic Liver Injury 344
Acute Hepatic Necrosis and Renal Failure 345
Carbon Tetrachloride Poisoning 345
Phosphorus Poisoning 346
Toxic Mushroom Ingestion 346
Acetaminophen (Paracetamol)Toxicity 347
Copper Toxicity 347
Acute Hepatic Injury Associated with Microvesicular Steatosis 347
Jamaican Vomiting Sickness 347
Margosa Oil Syndrome 347
Acute Cholestatic Injury 348
Methylenediamine 348
Paraquat 348
Toxic Oil Syndrome 348
Veno-Occlusive Disease 348
Primary Liver Tumors 349
Aflatoxin-B1 349
Vinyl Chloride 350
Polychlorinated Biphenyls 350
Porphyria Cutanea Tarda 350
Chronic Hepatitis and/or Cirrhosis 350
Herbal Drug Toxicity 350
Acute and Chronic Hepatitis 351
Cholestatic Hepatitis 351
Veno-occlusive Disease 351
Chapter 22 - Hepatic Granulomas 354
Definition 354
Etiology 354
Pathology 354
Clinical Manifestations 356
Laboratory Diagnosis Of Granulomatous Liver Disease 356
Different Conditions Causing Liver Granulomas 357
Tuberculosis 357
Hepatic granulomatous disease 357
Congenital tuberculosis 357
Primary hepatic tuberculosis 357
Disseminated/Miliary tuberculargranuloma 358
Tuberculoma 358
Sarcoidosis 358
Drugs 358
Brucellosis 358
Leprosy 358
Lymphoma 359
Granulomas in Patients with PrimaryParenchymal Liver Disease 359
Granulomatous Disease in Patients with HIV Infection 359
Schistosomiasis 360
Idiopathic Granulomatous Hepatitis[21] 360
Diagnosis 360
Treatment of Hepatic Granulomas 360
Chapter 23 - Autoimmune Hepatitis 363
Pathogenesis 363
Clinical Features 363
Histology 365
Diagnosis 366
Investigations 367
Treatment 369
Chapter 24 - Cirrhosis of the Liver 375
Definition[1] 375
Etiology[2] 375
Classification[1] 375
Pathogenesis[1] 375
Pathophysiology of Portal Hypertension: Ascites, Hepatic Encephalopathy, and Coagulopathy[3-11] 376
Ascites[7,8] 376
Hepatic Encephalopathy[10] 376
Coagulation Disorders[11] 377
Clinical Features and Complications 377
Compensated Cirrhosis 377
Decompensated Cirrhosis 377
Spontaneous Bacterial Peritonitis[12,13] 378
Gastrointestinal and Peripheral Bleeding[14,15] 378
Hepatic Encephalopathy[6,17] 378
Hepatorenal Syndrome[18,19] 379
Hepatopulmonary Syndrome[20] 379
Investigation of Patients With Cirrhosis of the Liver 380
Treatment for Patients With Cirrhosis of the Liver 380
Treatment of Variceal Bleeding 381
Acute Variceal Bleeding[21-23] 381
Long-term Prevention of Variceal Bleeding 381
Drug Therapy for Prevention of Bleeding[24-26] 382
Endoscopic Sclerosis and Band Ligation[27-29] 382
Treatment of Ascites, SBP, and HRS 383
Paracentesis[32,33] 383
Transjugular Intrahepatic Portosystemic Shunts (TIPS)[35] 383
Treatment of Hepatic Encephalopathy[39,40] 384
Liver Transplantation 385
Other treatments of cirrhosis of the liver: general issues 385
Chapter 25 - Noncirrhotic Portal Fibrosis 388
Historical Background And Nomenclature 388
Epidemiology 389
Etiopathogenesis 389
Infection 389
Exposure to Toxins and Chemicals 389
Immunologic Hypothesis 390
Pathology 390
Gross 390
Microscopic 391
Ultrastructure 392
Clinical Features 392
Demography and Symptoms 392
Physical Signs 393
Laboratory Features 393
Blood 393
Imaging 393
Splenoportovenography (SPV) 393
Percutaneous transhepatic portography (PTP) 394
Ultrasound and computed tomography (CT) angiography 395
25.6.3 Hemodynamic Studies 395
Diagnosis And Differential Diagnosis 395
Special Considerations 396
NCPF in Children 396
Comparison of NCPF Patients with orwithout Spontaneous Shunts 396
Comparison between EHPVO and NCPF 396
NCPF in Pregnancy 397
Management 397
Variceal Bleeding 397
Acute Variceal Bleeding 397
Prevention of Recurrent Bleeding from Esophageal Varices 398
Prognosis 398
Chapter 26 - Extrahepatic Portal Venous Obstruction 404
Introduction 404
Epidemiology 404
Etiology 404
Adult-onset EHPVO 404
EHPVO in Children 404
Coagulopathy 405
Clinical Manifestations 405
Investigations 406
Hemogram 406
Liver Function Tests 406
Ultrasound Abdomen 406
Computed Tomography (CT) andCT Arterial Portography (CTAP) 406
Magnetic Resonance Imaging and MR Portography 407
ERCP and MRCP 407
Treatment 408
Management of the Acute Variceal Bleed 408
Endoscopy 408
Surgery 408
Other therapies 408
Secondary prophylaxis 408
Conclusion 410
Chapter 27 - Budd-Chiari Syndrome 413
Introduction 413
Etiology of Budd-Chiari Syndrome 413
Pathophysiology of BCS Classification[17] 415
Clinical Manifestations 415
Asymptomatic 416
Fulminant 416
Acute 416
Subacute (<6 months) 416
Chronic 416
Diagnosis 416
Ultrasound 416
Computerized Tomography 417
Magnetic Resonance Imaging (MRI) 417
Liver Biopsy 417
Angiography 417
Medical Therapy 417
Thrombolytic Therapy 417
Angioplasty and Stenting 418
Transjugular Intrahepatic Portosystemic Shunt (TIPS) 418
Surgery 418
Dorsocranial Resection (Senning Procedure) 419
Portosystemic Shunts 419
Mesoatrial Shunts 419
Liver Transplantation 419
Prognosis 420
Part VI Liver Failure 423
Chapter 28 - Acute Liver Failure 425
Definitions 425
Complications and Sequelae of ALF 426
Cerebral Edema 426
Encephalopathy 428
Immunologic Break Down and Infectious Complications 428
Metabolic Dysfunction 429
Coagulopathy 429
Cardiovascular Effects 429
Renal Failure 429
Hematologic Disturbances 430
Etiology 430
Hepatitis A (HAV) 430
Hepatitis B (HBV) 430
Hepatitis B Mutants 431
Reactivation of Hepatitis B 431
Hepatitis D (HDV):Superinfection/Coinfection 431
Hepatitis C 431
Hepatitis E 432
Mushrooms 432
Wilson's Disease 432
Other Viruses 432
Drugs 432
Prognostic Criteria 433
Management 434
Neurologic Support 434
Intracranial Pressure Monitoring 434
Reverse Jugular Venous Monitoring 435
Osmotherapy 435
Thiopentone 435
Hypothermia 436
Prophylactic Phenytoin 436
Hyperventilation 436
Ammonia Lowering Measures 436
Other Therapies 436
Prevention and Treatment of Infection 436
Hemodynamic Support 437
Coagulopathy 437
Mechanical Ventilation of Patients with Liver Failure 437
Microcirculation 438
Renal Support 438
Nutritional and Metabolic Support 438
Liver Transplantation 439
Nontransplant Therapies for Liver Support 439
Molecular adsorbent recirculating system (MARS) 440
Conclusions 440
Chapter 29 - Subacute Hepatic Failure 445
DEFINITION 445
Synonyms 445
ETIOLOGY 445
PATHOLOGY 446
INVESTIGATIONS 447
CLINICAL FEATURES 447
Clinical Course and Prognosis 447
TREATMENT 448
Chapter 30 - Benign Liver Tumors 450
Hepatic Adenoma 450
Pathology 451
Clinical Features 451
Imaging of Adenomas 452
Ultrasonography (USG) 452
Computed tomographic (CT) scan 452
Magnetic resonance imaging (MRI) 452
Radionuclide imaging 452
Angiography 453
Treatment 453
Focal Nodular Hyperplasia 453
Pathogenesis 453
Pathology 453
Multiple FNH Syndrome 454
Clinical Features 454
Imaging of FNH 454
USG 454
CT scan 455
MRI 455
Radionuclide imaging 455
Angiography 455
Natural History 456
Treatment 456
Nodular Regenerative Hyperplasia 456
Pathogenesis 456
Pathology 456
Clinical Features 456
Imaging of NRH 457
USG 457
CT scan 457
MRI 457
Treatment 457
Polycystic Liver Disease 457
Pathology 457
Clinical Features 457
Treatment 458
Simple Hepatic Cysts 458
Imaging of Liver Cysts 458
USG 458
CT scan 458
MRI 458
Biliary Microhamartomas (Von Meyenburg Complex) 458
Prevalence 458
Pathology 459
Imaging of Biliary Microhamartomas 459
USG 459
CT scan 459
MRI 459
Bile Duct Adenoma 459
Clinical Features 459
Part VII Gallbladder and Biliary Tract 467
Chapter 31 - Gallstone Disease 469
Composition of Gallstones 469
Composition of Gallstones in India 470
Incidence and Prevalence 470
Risk Factors 470
Genetic and Racial Factors 470
Age and Sex 471
Pregnancy and Parity 471
Obesity, Weight Loss, and Total Parental Nutrition 471
Dietary Factors and Hyperlipidemia 472
Drugs 472
Systemic Diseases 472
pathogenesis 473
Pathogenesis of Cholesterol Gallstones 473
Cholesterol supersaturation 473
Nucleating and antinucleating factors 474
Role of calcium in gallstone formation 474
Gallbladder hypomotility 474
Role of intestinal transit 475
Genetic factors 475
Recent advances in pathogenesisof gallstones 475
Pathogenesis of Pigment Stones 476
Natural History of Gallstone Disease 477
Clinical Manifestations of Gallstone Disease 477
Gallstones and Gallbladder Cancer 478
Gallstones and Xanthogranulomatous Cholecystitis 478
Diagnosis 478
Management of Gallstones 481
Asymptomatic Gallstones 481
Symptomatic Gallstones 481
Acute Cholecystitis 482
Choledocholithiasis 482
Chapter 32 - Gallbladder Cancer and Cholangiocarcinoma 485
Gallbladder Cancer 485
Epidemiology 485
Pathology and Modes of Spread 487
Staging 488
Clinical Presentation 488
Diagnosis 489
Imaging 490
Tumor Markers 491
Cytology 492
Upper Gastrointestinal Endoscopy 492
Laparoscopy 492
Management 492
Surgery 492
Radiotherapy and Chemotherapy 497
Palliation in GBC 497
Prevention 499
Cholangiocarcinoma 500
Incidence 500
Etiology 500
Clinical Presentation 501
Differential Diagnoses 501
Preoperative Work Up and Imaging 502
Cholangiography 502
Laparoscopy 503
Tumor Staging 503
Management 504
Extent of Surgery 505
Preoperative Biliary Drainage (PBD) 505
Portal Vein Embolization (PVE) 507
Orthotopic Liver Transplantation 507
Adjuvant Therapy 507
Palliation 507
Chapter 33 - Choledochal Cysts 514
Introduction 514
History 514
Classification 514
Epidemiology 515
Clinical Features 516
Infants 516
Older Children 516
Adults 516
Investigations 516
Pathology 517
Etiology 517
Abnormal Pancreaticobiliary Duct Junction 517
Oligoganglionosis 518
Heredity 518
Forme Fruste Choledochalcyst 518
Prenatally Diagnosed Choledochal Cyst 518
Complications 519
Rupture of Cyst 519
Pancreatic Complications 519
Carcinoma 520
Treatment 521
Type I Cyst 521
Type II Cysts (Diverticulum) 522
Type III Cysts (Choledochocele) 522
Type IV Cysts 522
Laparoscopic Excision of Choledochal Cysts 522
Chapter 34 - Benign Bile Duct Strictures 528
Operative Bile Duct Injury 528
Incidence 528
Classification of Injuries 528
Presentation 529
Consequences of Prolonged Biliary Obstruction 529
Investigations 530
Cholangiography 530
Other Imaging 531
Management and Outcome 531
Endoscopic Treatment 531
Surgery 531
Part VIII Pancreas 537
Chapter 35 - Acute Pancreatitis 539
Classification of Acute Pancreatitis 539
Development of Acute Pancreatitis[4-6] 539
Pathology 541
Etiology and Risk Factors 541
Biliary Tract Disease 541
Alcohol Abuse 542
Tumors and Other Obstructive Lesions 542
Infections and Infestations 543
Drugs and Toxins 543
Metabolic and Other Disorders 543
Postprocedure 544
Idiopathic Acute Pancreatitis 545
Clinical Features 545
Diagnosis 545
Serum Amylase and Lipase[13,80-83] 545
Other Laboratory Tests 546
Plain X-rays 546
Ultrasonography 546
CT cand MRI 547
ERCP 547
Treatment 548
Immediate Treatment 548
Feeding and Nutrition 548
Endoscopic Papillotomy in Severe Biliary Pancreatitis 549
Recurrence 549
Timing 550
Risks 550
Complications of Acute Pancreatitis 550
Acute Fluid Collection 550
Pseudocyst 551
Pancreatic Necrosis 551
Hemorrhage 552
Infectious Complications 552
Bacteriology 553
Prophylactic Antibiotics 553
Choice of Antibiotics 554
Gut Decontamination 554
Prognosis 554
Ranson's Criteria 555
Apache II Score 555
Ct Grading of Acute Pancreatitis 558
Chapter 36 - Chronic Pancreatitis 566
Introduction 566
Epidemiology of Chronic Pancreatitis 566
Epidemiology of Chronic Pancreatitis in India 567
Etiopathogenesis and Pathology 567
Pathophysiology 568
Pathophysiology of Tropical Chronic Pancreatitis (TCP) 569
Pathology of Chronic Pancreatitis 570
Molecular Events 571
Clinical Manifestations 571
Steatorrhea 572
Diabetes Mellitus 572
Cancer 573
Chronic Pancreatitis in the West and in India 573
Diagnosis of CP 573
Pancreatic Function Tests 573
Direct Tests 574
Imaging in Chronic Pancreatitis 574
Secretin Studies 576
Endoscopic Ultrasound (EUS) (Fig. 36.4) 576
Endoscopic Retrograde Cholangiopancreatography (ERCP) 577
A practical approach to diagnosis in India 578
The Mechanism of Pain in Chronic Pancreatitis 578
Neural Mechanisms 578
Ductal and Parenchymal Pressures 579
Natural Course of Pain in Chronic Pancreatitis 579
Nonsurgical Treatment of Pain in CP 580
Pancreatic enzyme supplements 580
Nerve blocks in the treatment of pain in CP 580
Surgery In CP 581
Surgery for Pain in Chronic Pancreatitis 582
Pancreaticojejunostomy 582
Pancreatectomy 587
Pancreaticoduodenectomy 588
Surgery for Complications of Chronic Pancreatitis 589
Biliary stenosis 589
Duodenal stenosis 590
Colonic obstruction 590
Portal venous obstruction 590
Pancreatic ascites and pleural effusion 590
chapter 37 - Cancer of the Pancreas 597
Epidemiology 597
Risk Factors 597
Age 597
Sex 597
Smoking 598
Diet 598
Diabetes mellitus 598
Chronic pancreatitis 598
Familial factors 598
Molecular biology 598
Genetics 599
Pathophysiology 599
Histological Findings 599
Cystic Lesions 600
Clinical Features 600
History 600
Physical Examination 601
Investigations 601
General Laboratory Studies 601
Tumor Markers 601
Imaging Studies 601
Ultrasound 601
CT scan (Computerized tomography) 602
MRI (Magnetic resonance imaging) 602
ERCP (Endoscopic retrograde cholangiopancreatography) 602
EUS (Endoscopic ultrasonography) 602
PET (Positron emission tomography scanning) 603
Laparoscopy 603
Preoperative Tissue Diagnosis 603
Staging 604
Treatment 604
General Principles 604
Preoperative Biliary Drainage 604
Surgical Treatment 605
PPPD (Pylorus preserving pancreaticoduodenectomy) 605
Resections of portal/mesenteric vein 606
Extended lymph node resection 606
Features suggestive of irresectability 606
Cancer of the Body and Tail of the Pancreas 606
Somatostatin Analogues 607
Adjuvant Therapy 607
Biological Therapy 607
Antiangiogenic therapy 607
Nutritional Support 607
Palliative Therapy 608
Pain 608
Jaundice 608
Duodenal Obstruction 608
Management Algorithm (Fig 37.5) 609
Prevention 609
Prognosis 610
Favorable Prognostic Factors 610
Summary 610
Part IX Parasitic Diseases 613
Chapter 38 - Intestinal and Extraintestinal Amebiasis 615
Introduction 615
Microbiology 616
Biology and Life Cycle 616
Trophozoite 616
Cyst 616
Life cycle 617
Epidemiology 617
Intestinal Amebiasis 618
Pathogenesis 618
Ulcers 618
Molecular events 618
Immunology 619
Clinical Features 619
Intestinal amebiasis 620
Surgical Complications 620
Diagnosis 620
Stool specimen 620
Sigmoidoscopic examination 621
Serology 621
Newer methods 621
Treatment 621
Uncomplicated amebiasis 621
Surgical Complications 622
Vaccine 622
Amebic Liver Abscess 622
Extraintestinal Amebiasis 622
Epidemiology 622
Clinical Features 622
Variants[35] 623
Multiple Liver Abscesses 623
Left lobe abscess 624
Compression lesions 624
Extension of the abscess 624
Diagnosis 624
Treatment 625
Medical therapy 625
Aspiration or drainage of abscess 625
Surgical therapy[29] 626
Long-term follow-up 626
Prognosis 626
Sexually Transmitted Amebiasis 626
Chapter 39 - Hydatid Cyst of the Liver 629
Introduction 629
Epidemiology 629
LIFE CYCLE OF E. GRANULOSUS 629
Development in the Intermediate Host (Humans) 630
Clinical Features 630
Complications 631
Infection 631
Rupture (Internal/External) 631
Diagnosis 632
Ultrasound 632
Cect/Mri 632
Ercp 632
Immunological Tests 633
Management 633
Medical Treatment 633
Efficacy 634
Mechanism of action 634
Dosage 634
Side effects and toxicity 635
Follow-up protocol for medicalmanagement 635
Surgical Treatment 635
Open surgical procedures 635
Laparoscopic surgery 637
Percutaneous Management (PAIR) 638
Chapter 40 - Schistosomiasis 641
Life Cycle of Schistosomes 641
Pathophysiology 641
Immunology of Hepatic Inflammation/Fibrosis in Schistosomiasis 642
Clinical Features 642
Schistosomiasis and Hepatitis 643
Diagnosis 644
Stool Examination 644
Serology 644
Imaging 644
Management 644
Medical Management 645
Reversibility of Schistosomal Hepatic Fibrosis 645
Future Therapies for Schistosomiasis 646
Surgical Management 646
Prevention of Schistosomiasis: Vaccine Development 646
Conclusion 647
Part X Special Topics 651
Chapter 41 - Abdominal Tuberculosis 653
Changing Profile of Tuberculosis 653
Epidemiology 653
World 653
India 653
Pathogenesis 654
Pathologic Appearance 655
Clinical Features 656
Diagnostic Criteria 658
Diagnostic Approach 659
Ascitic Presentation 659
Masses, Obstruction, Nonobstructive, and Vague Presentation 659
Diagnostic Aids 659
Supportive Diagnostic Aids 659
Barium contrast radiography 659
Ultrasonography 660
CT scan 662
Serodiagnosis 662
Biochemical markers of tuberculosis 663
Confirmatory Modalities 663
Histologic diagnosis 664
Upper GI Endoscopy 664
Enteroscopy 664
Laparoscopy 665
Colonoscopy 665
Bacteriologic Diagnosis 666
Smear Examination 666
AFB on Histology 667
Culture 667
Molecular Methods of Diagnosis 667
PCR in Abdominal Tuberculosis 667
Hepatic Tuberculosis 667
Pathogenesis 668
Clinical Presentation 668
Diagnosis 668
Imaging techniques 668
Liver biopsy 669
Laparoscopy 669
ERCP/PTC 669
Treatment 669
Special Situations 670
HIV confection 670
Hepatic disease 671
Pregnancy 671
Multiple drug resistant (MDR)tuberculosis 671
Adjuvants to Antitubercular Therapy 671
Corticosteroids 671
Surgery 672
Chapter 42 - Diarrhea In Children 678
Definition 678
Classification 678
chapter 43 - Nonvariceal Upper Gastrointestinal Tract Bleeding 703
Medical History and Physical Examinatio 703
Laboratory Testing 704
Initial Management 705
Nasogastric Aspiration 705
General Measures 705
Fluid Replacement 705
Transfusion Requirements 705
Acid Suppressive Therapy 706
Endoscopic Means of Hemostasis (Table 43.2) 706
Argon Plasma Coagulation 707
Endoscopic Injection Therapy for Bleeding Peptic Ulcer 707
Mechanical Means of Hemostasis 708
Endoscopic Electrocoagulation (EC) 709
Heater Probe 710
Laser 710
Technique 710
Management of Site Specific Bleeding 711
Peptic Ulcer Disease 711
H. pylori and peptic ulcer bleeding 711
Hemorrhagic Gastritis 712
Mallory-Weiss Tears 712
Dieulafoy's Lesion 712
Angiodysplasia 713
Risk Assessment in UGI Bleeding 713
Second Look Endoscopy 713
Interventional Radiology 713
Surgical Intervention in UGI Bleeding 714
Chapter 44 - Lower Gastrointestinal Bleeding 722
Incidence and Epidemiology 722
Etiology 722
Evaluation And Resuscitation 726
Endoscopy 728
Upper Gi Endoscopy 728
Diagnostic Colonoscopy 729
Radiography 730
Radionuclide Imaging 730
Angiography 731
Small Bowel Evaluation 732
Therapeutic Colonoscopy 732
Surgery 733
Complications 735
Morbidity and Mortality 735
Conclusion 736
Chapter 45 - Hepatorenal Syndrome 738
Historical Perspective Of Hrs 738
Incidence 738
Diagnostic Criteria 738
Classification 739
Pathogenesis 740
Precipitating Factors 740
Clinical And Laboratoryfindings 740
Approach To A Patient Withhrs 741
Management Of Hrs 741
Vasoconstrictors 741
Albumin Infusion along with Vasopressor 741
Transjugular IntrahepaticPortocaval Shunt (TIPS) 741
Liver Transplantation 743
Other Treatment Modalities 743
Prognosis 743
Chapter 46 - Hepatic Encephalopathy 746
Clinical Features 746
Differential Diagnosis 747
Investigations 748
Pathology 749
Prognosis 749
Pathogenesis (Fig. 46.1) 749
Treatment 750
General Measures 750
Control of Precipitating Factors 750
Caloric and Protein-administration, Enemas 750
Pharmacotherapy 752
Reduction of intestinal ammoniageneration 753
Enhancing the ammonia-detoxifying capacity of the liver 753
Reduction of extraintestinal ammonia formation and of false neurotransmitters 753
Inhibition of GABA-receptors 753
Other Treatments 753
Chapter 47 - Ascites In Cirrhosis 755
Clinical Features 755
Pathogenesis of Ascites in Cirrhosis 755
The Underfill Theory 755
The Overflow Theory 756
Forward Theory 756
Definitions 756
Evaluation of Ascites 757
Treatment Modalities 757
Dietary Salt Restriction 757
Diuretics 758
Aquaretics 758
Therapeutic Paracentesis 758
Transjugular Intrahepatic Portasystemic Shunt (TIPS) 759
Peritoneovenous Shunt 759
Liver Transplantation 759
Prognosis 759
Chapter 48 - Malignant Liver Tumors 761
Hepatocellular Carcinoma 761
Epidemiology 761
Risk Factors and Etiology 761
Pathophysiology 762
Clinical Presentation 763
Investigations 763
Staging 767
TNM definitions 767
Management 768
Surgical resection 768
Liver transplantation 770
Resection vs transplantation forpatients otherwise eligible for transplant 771
Percutaneous ethanol injection(PEI) 771
Hepatic artery embolization 771
Transarterial chemotherapy 771
Transarterial chemoembolization (TACE) 772
Radiofrequency ablation 772
Transarterial radioembolization 772
Systemic chemotherapy 772
Immunotherapy 773
Hormonal therapy 773
Survival and Prognosis 773
Fibrolamellar HCC 773
Intrahepatic Cholangiocarcinoma 773
Liver Metastases 773
Surgical Management 774
Malignant Tumors in Children 775
Index 780