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Iron Disorders, An Issue of Hematology/Oncology Clinics, E-Book

Iron Disorders, An Issue of Hematology/Oncology Clinics, E-Book

Matthew M. Heeney

(2014)

Additional Information

Abstract

This issue of Hematology/Oncology Clinics, guest edited by Drs. Matthew Heeney and Alan Cohen, is devoted to Iron Disorders.  Articles in this issue include: Hereditary Hemochromatosis (HFE and Non-HFE); Iron Refractory Iron Deficiency Anemia (IRIDA); Sideroblastic Anemia; Anemia of Chronic Disease/Inflammation; Pathophysiology of Transfusional Iron Overload; Transfusional Iron Overload and Iron Chelation Therapy; Iron Overload and its Management in Non-Transfusion-Dependent Thalassemia; Treatment of Iron Deficiency Anemia; and Iron Overload Assessment.

Table of Contents

Section Title Page Action Price
Front Cover Cover
Iron Disorders\r i
Copyright\r ii
Contributors\r iii
Contents\r v
Hematology/Oncology Clinics Of North America\r viii
Preface\r ix
Diagnostic Evaluation of Hereditary Hemochromatosis (HFE and Non-HFE) 625
Key points 625
Introduction 625
Iron Metabolism 625
Iron absorption and export 625
Hepcidin 626
Hepcidin regulation 626
Iron Overload 626
Hepcidin deficiency 626
Ferroportin disease 626
Penetrance 627
Diagnostic Work-up 627
Patient history 627
Physical examination 628
Organs Involved in Hereditary Hemochromatosis 628
Liver disease 628
Bones and joints 628
Heart 629
Pancreas 629
Pituitary 629
Clinical Presentation According the Type of Hereditary Hemochromatosis 630
Hepcidin deficiency 630
Ferroportin disease 630
Types of hereditary hemochromatosis and genetic testing 630
The Different Types of Hereditary Hemochromatosis 630
Type 1 (HFE related) hemochromatosis 630
Type 2 (HJV and HAMP related) hemochromatosis 631
Type 3 (TFR2 related) hemochromatosis 631
Type 4 hemochromatosis: ferroportin disease 631
Other rare iron overload diseases 632
Genetic Testing 632
Increased transferrin saturation 632
Normal or low transferrin saturation 633
Summary 633
References 633
Iron-Refractory Iron Deficiency Anemia (IRIDA) 637
Key points 637
Introduction 637
Clinical presentation 638
Genetics 641
Differential diagnosis 645
Treatment 648
Acknowledgments 648
References 648
Sideroblastic Anemia 653
Key points 653
General overview 653
Diagnosis 654
Nonsyndromic CSAs 654
Syndromic CSAs 658
Undefined CSAs 659
Acquired Clonal SAs 660
Acquired Metabolic SAs 661
Disease courses and treatment options 661
Nonsyndromic CSA 661
Syndromic CSA 662
Acquired Clonal SA 662
Splenectomy in SA 662
Iron overload 663
Summary 665
References 665
Anemia of Inflammation 671
Key points 671
Clinical presentation 671
Definitions 671
Related Conditions 672
Diagnosis 672
Diagnostic Challenges 672
Prevalence 673
Pathophysiology 673
Overview of the Causative Factors 673
Erythrocyte Destruction 673
Hypoferremia 673
Increased Hepcidin Causes an Iron-Restricted Anemia Even in the Absence of Inflammation 674
Suppression of Erythropoiesis by Inflammation 675
Hepcidin-induced Hypoferremia and Interferon-γ Synergize to Suppress Erythropoiesis 675
Animal Models of AI Show Partial Dependence on Hepcidin 676
Treatment of AI 676
Current Therapy 676
Experimental Therapy 678
References 678
The Pathophysiology of Transfusional Iron Overload 683
Key points 683
Iron homeostatic mechanisms 683
Body Iron Homeostasis 684
Cellular Iron Homeostasis 685
Impact of blood transfusion on iron balance 685
Thalassemia Major 686
Sickle Cell Disease 686
Other Conditions 686
Mechanisms of iron toxicity in transfusional overload 687
Distribution and consequences of TIO 688
Iron Distribution and Consequences in Thalassemia Major 688
Iron Distribution and Consequences in SCD 690
Iron Distribution in Other Forms of TIO 691
Mechanisms underlying distribution of transfused iron 691
References 694
Transfusional Iron Overload and Iron Chelation Therapy in Thalassemia Major and Sickle Cell Disease 703
Key points 703
Introduction 703
Blood transfusions 704
TM 704
SCD 704
Erythrocytapheresis in SCD 704
Iron overload 705
Does Iron Overload Differ Between SCD and TM? 705
Iron-induced Organ Damage in SCD 706
Complications of Iron Overload 706
Heart 706
Liver 707
Endocrine organs 707
Iron chelation 708
Deferoxamine B 708
Deferiprone 708
Deferasirox 709
New Chelators 713
Combination Therapy 713
New Combinations 715
Alternating Therapy 715
Can Ferritin Be Too Low? 716
Compliance 716
Chelation After Bone Marrow Transplantation 717
Costs 717
Availability of Chelation 717
Summary 718
Supplementary data 718
References 718
Diagnosis and Management of Iron Deficiency Anemia 729
Key points 729
History of iron therapy 729
Problem of IDA 730
Incidence/Prevalence 730
Clinical features and sequelae of IDA 730
Prevention and early diagnosis are the ideal 731
Management of IDA 732
Confirmation of the Diagnosis 732
Other Causes of Microcytic Anemia 733
Identification and Management of the Primary Cause: Children and Adolescents 733
Identification and Management of Primary Cause: Adults 734
Providing Iron Therapy 734
Reasons for Near Absence of Data to Inform Treatment 734
Oral iron therapy 734
Iron Preparation 734
Dosing 735
Hematologic Response and Duration of Therapy 736
Advantages and Disadvantages of Oral Iron 737
Intravenous iron therapy 737
Indications for Intravenous Iron 737
Intravenous Iron Preparations 737
Dosing and Administration 739
Intravenous Iron in Children 739
Oral Versus Intravenous Iron 739
Future research 740
Need for Pragmatic Therapeutic Trials 740
Summary 740
References 741
Use of Magnetic Resonance Imaging to Monitor Iron Overload 747
Key points 747
Monitoring transfusion burden 747
Serum markers of iron overload 748
Measurement of liver iron concentration 749
Liver Biopsy 749
Computed Tomography 750
Magnetic Detectors 750
Magnetic Resonance Imaging 751
Measurement of nonhepatic iron stores 753
Heart Iron 754
Pancreas Iron 754
Pituitary Iron 757
Kidney Iron 758
Spleen Iron 758
Impact of disease state on extrahepatic iron loading 758
Rational monitoring practices 759
Availability of MRI iron assessments 760
Summary 760
References 761
Index 765