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Endocrine Surgery, An Issue of Surgical Clinics, E-Book

Endocrine Surgery, An Issue of Surgical Clinics, E-Book

Peter J. Mazzaglia

(2014)

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Book Details

Abstract

Editor Peter Mazzaglia and authors review the current management and procedures in endocrine surgery. Articles will cover: central compartment lymph node dissection for papillary thyroid cancer; evaluation of thyroid incidentaloma; the role of genetic markers in the evaluation and management of thyroid nodules; medical therapy for advanced forms of thyroid cancer; follicular lesions of the thyroid; controversy over radio-iodine ablation: who benefits?; minimizing cost while maximizing success in the pre-operative localization strategy for primary hyperparathyroidism; operative treatment for primary hyperparathyroidism; evaluation of adrenal incidentalomas: biochemical and radiographic characterization; hyperaldosteronism: diagnosis, lateralization, and treatment; subclinical Cushing’s syndrome; adrenocortical cancer update; and pancreatic neuroendocrine tumors.

Table of Contents

Section Title Page Action Price
Front Cover Cover
Endocrine Surgery i
copyright\r ii
Contributors iii
Contents vii
Surgical Clinics\rOf North America\r xi
Foreword\r xiii
Preface\r xv
Evaluation of Thyroid Incidentaloma 485
Key points 485
Introduction 485
Detection of incidental thyroid nodules 486
CT scan detection of incidental thyroid nodules 486
Case Presentation 486
PET scan detection of incidental thyroid nodules 489
Case Presentation 489
Neck U/S and carotid duplex scan detection of incidental thyroid nodules 490
The role of the incidental thyroid nodule in the rising incidence of thyroid cancer 493
Summary 495
References 495
Follicular Lesions of the Thyroid 499
Key points 499
Introduction 499
Clinical presentation 500
Preoperative diagnosis 500
Ultrasonography 500
Fine-Needle Aspiration 501
Molecular Markers 502
Pathologic diagnosis 503
Follicular Adenoma and Carcinoma 503
Follicular Variant of Papillary Cancer 503
Differential diagnosis 505
Treatment 506
Surgical Management 506
Role of Intraoperative Frozen Section 506
Radioactive Iodine 507
Follow-Up 507
Prognosis 507
Tumor histology 508
MIFC 508
WIFC 509
FVPTC 509
Summary 509
References 509
The Role of Genetic Markers in the Evaluation and Management of Thyroid Nodules 515
Key points 515
Introduction 515
Background 516
Currently available techniques 516
Gene expression profiling 517
Available Gene Expression Profiling Tests 517
Which Patients Should Be Considered for Afirma Testing? 518
Which Patients Should Not Undergo Afirma Testing? 519
Timing and Details of Sample Collection for Afirma Testing 519
Mutational panels 520
BRAF Mutations 521
RAS Oncogenes 522
Rearrangment during transfection/PTC proto-oncogene rearrangements 522
PAX8/PPARG rearrangements 522
Telomerase reverse transcriptase promoter mutations 522
Available mutational panel tests 522
Which Patients Should Be Considered for Mutational Testing? 523
Which Patients Should Not Get Mutational Testing? 523
Timing and Details of Sample Collection for Mutational Testing 523
Discussion 524
Cost-effectiveness 525
Future direction 525
References 526
Prophylactic Central Compartment Neck Dissection for Papillary Thyroid Cancer 529
Key points 529
Introduction 529
Lymph node metastases in patients with papillary thyroid cancer 531
Central compartment recurrence for clinically node-negative PTC with or without pCCND 532
Effect of pCCND on postoperative serum thyroglobulin levels and radioiodine uptake 533
Effect of pCCND on indications for radioiodine ablation and dosing of 131I 533
Morbidity of CCND 534
Summary 535
References 535
Medical Therapy for Advanced Forms of Thyroid Cancer 541
Key points 541
Introduction 541
Historical overview 542
Medical therapy for advanced DTC 545
Targets and Mechanisms 545
Therapeutic Agents 555
Medical therapy for advanced MTC 559
Targets and Mechanisms 560
Therapeutic Agents 560
Medical therapy for ATC 561
Targets and Mechanisms 561
Therapeutic Agents 561
Innovative studies in prospective drugs 562
Advanced DTC and MTC 562
ATC 563
Algorithm for management: targeted therapy for thyroid cancer 563
Advanced DTC 563
MTC 563
ATC 564
Efficacy of medical therapy for advanced thyroid cancer 564
Summary 565
References 565
Controversy Over Radioiodine Ablation In Thyroid Cancer 573
Key points 573
Introduction 573
Epidemiology 574
Overdiagnosis 575
Extent of surgery 576
Advantages of radioiodine treatment 577
Recent guidelines 577
Who benefits? 578
High-Risk Patients 578
Lack of Benefit for Low-risk Patients 579
Patients Who May Benefit from Radioiodine Treatment: Intermediate-Risk 579
Changing approaches to radioiodine therapy 580
The role of preablation, diagnostic whole-body scans 581
Side effects and risk of secondary malignancy 582
Summary 582
References 583
Minimizing Cost and Maximizing Success in the Preoperative Localization Strategy for Primary Hyperparathyroidism 587
Key points 587
Introduction 587
Parathyroid Embryology and Anatomy As It Relates to Imaging Interpretation 588
Superior parathyroid anatomic and imaging location 588
Inferior parathyroid anatomic and imaging location 589
US 589
Typical US Appearance and Location of Parathyroid Adenomas 591
Accuracy of US 591
Cost-Effectiveness of US 592
MIBI 593
Choosing the Appropriate Scintigraphy Study 596
Accuracy and Cost-Effectiveness of Scintigraphy 596
4DCT 597
Accuracy of 4DCT 598
Cost-Effectiveness of 4DCT 598
Other Considerations Regarding 4DCT 598
Differential jugular venous sampling 599
Summary and recommendations 600
References 602
Operative Treatment of Primary Hyperparathyroidism 607
Key points 607
Introduction 608
The arguments in favor of routine 4-gland exploration 609
Learn from History or Be Doomed to Repeat It 609
Four-gland Exploration May Yield the Highest Long-term Cure Rate 610
Four-gland Exploration Is a Low-risk, Safe Operation 611
Reoperation Has a Lower Cure Rate and Higher Complication Rate Than Initial Surgery 611
Four-gland Exploration Is Mandatory in Patients with High Risk of Multigland Disease 611
Preoperative Localization Studies and Their Costs Are Not Necessary Before 4-Gland Exploration 612
Intraoperative Adjuncts, Including IOPTH, Are Not Necessary in 4-Gland Exploration 612
Depending on the Time Required for IOPTH, 4-Gland Exploration May Be Faster 612
Summary of the arguments in favor of routine 4-gland exploration 613
The arguments in favor of focused parathyroidectomy 613
Focused Parathyroidectomy and 4-Gland Exploration Have Similar Cure Rates 613
Focused Parathyroidectomy Is Less Costly Than 4-Gland Exploration 614
Focused Parathyroidectomy May Have Lower Complication Rates Than 4-Gland Exploration 615
Focused Parathyroidectomy Should Be Faster Than 4-Gland Exploration 615
Focused Parathyroidectomy Is Associated with Less Patient Discomfort 615
A Policy of Routine Bilateral Exploration Is Equivalent to Performing Unnecessary Dissection 95% of the Time 616
Summary of the arguments in favor of focused parathyroid exploration 616
Summary 617
References 618
Radiographic Evaluation of Nonfunctioning Adrenal Neoplasms 625
Key points 625
Adrenal incidentaloma and rates of adrenocortical carcinoma 625
Initial radiographic presentation 627
Adrenal CT 628
Adrenal MRI 628
CT washout techniques 630
PET scan 632
Imaging characteristics of individual lesions 632
Myelolipoma 633
Cyst 633
Hemorrhage 633
Adrenocortical Cancer 634
Patients with a Known Nonadrenal Malignancy 636
Adrenal metastases 636
Protocol for radiographic workup 636
Follow-up 637
References 638
Hyperaldosteronism 643
Key points 643
History and epidemiology 643
Pathophysiology and clinical impact 644
Diagnosis 645
Screening 645
Confirmatory Testing 646
Lateralization 648
Anatomic imaging 648
AVS 649
Additional lateralization tests 650
Genetic testing 651
Treatment 651
Surgical 651
Summary 652
References 652
Subclinical Cushing Syndrome 657
Key points 657
Introduction 657
Definition 658
Diagnosis 658
Rationale 658
Dexamethasone-Suppression Testing 659
Corticotropin (Adrenocorticotropic Hormone) 660
Dehydroepiandrosterone Sulfate 661
Urinary Free Cortisol 661
Midnight Cortisol 661
Approach to SCS Diagnosis in Adrenal Incidentaloma 662
Adrenal scintigraphy 663
Indications for surgery in SCS 663
Summary 664
References 664
Adrenocortical Cancer Update 669
Key points 669
Introduction 669
Clinical presentation 670
Imaging evaluation 670
Computed Tomography 670
Magnetic Resonance Imaging 671
Fluorodeoxyglucose Positron Emission Tomography 672
Metomidate-Based Imaging 672
Pathologic evaluation, prognostic factors, and staging 672
Pathologic Evaluation 672
Prognostic Factors 673
Surgical management of locoregional and locally advanced disease 674
Role of Lymphadenectomy 675
Role of Nephrectomy 676
Laparoscopic Versus Open Adrenalectomy 676
Surgical management of systemic and recurrent disease 678
Adjuvant therapy 678
Mitotane 679
Patients with low-risk to intermediate-risk ACC 679
Patients with locally advanced or metastatic disease 679
Radiotherapy 680
Local and Targeted Ablative Therapies 680
Targeted Cytotoxic Therapies 681
Summary 682
References 682
Nonfunctional Pancreatic Neuroendocrine Tumors 689
Key points 689
Introduction 689
Relevant anatomy/pathophysiology 690
Clinical presentation 691
Diagnosis 693
Diagnostic procedures 694
CT 694
MRI 695
Endoscopic Ultrasonography 695
Somatostatin Receptor Scintigraphy (Indium In Pentetreotide [Octreoscan]) 695
Surgical management 695
Management of hepatic metastases 700
Systemic therapy 700
Somatostatin Analogues 700
Cytotoxic Chemotherapy 702
Targeted Therapy 702
Everolimus 702
Sunitinib 703
Bevacizumab 703
Summary 703
References 704
Index 709