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What is MKSAP 19 Hematology (2022)?

MKSAP 19: Hematology (2022) is a medical education and self-assessment resource published by the American College of Physicians (ACP). It covers major hematologic conditions, including anemia, blood cancers, platelet and coagulation disorders, thrombosis, and transfusion medicine. It is designed primarily for internal medicine physicians, residents, and other clinicians seeking to strengthen their clinical knowledge and prepare for professional examinations.

Introduction

Hematology is an essential part of internal medicine, connecting laboratory interpretation with the diagnosis and management of a wide range of clinical conditions. An abnormal complete blood count, unexplained anemia, thrombocytopenia, or suspected venous thromboembolism may be the first indication of a significant underlying disorder. 

Recognizing these findings and selecting appropriate investigations are important skills for physicians working in outpatient clinics, emergency departments, and hospital settings.

MKSAP 19: Hematology is a clinical education and self-assessment resource published by the American College of Physicians (ACP) in 2022. It is part of the nineteenth edition of the Medical Knowledge Self-Assessment Program, a broader educational initiative designed to support continuing learning in internal medicine.

Rather than focusing exclusively on one disease group, this hematology volume addresses a broad range of blood-related conditions. Its coverage extends from common problems, such as iron-deficiency anemia and abnormal leukocyte counts, to complex disorders involving bone marrow failure, hematologic malignancies, abnormal coagulation, and transfusion complications.

The book is particularly relevant to physicians who need to recognize hematologic problems in general medical practice. It also offers a structured way for residents and examination candidates to review important concepts and test their understanding through self-assessment questions.

For medical students, interns, and early-career doctors, the book can help organize hematology knowledge around clinical problems. For experienced internists, it provides an opportunity to revisit important diagnostic and management principles and identify areas requiring further study.

This review examines the book's documented scope, educational organization, major subject areas, and potential value for clinical learning and examination preparation.

Book overview

MKSAP 19: Hematology

Medical Knowledge Self-Assessment Program

Publisher: American College of Physicians (ACP)

Publication year: 2022

Edition: 19th edition of MKSAP

Specialty: Hematology within internal medicine

ISBN: 978-1-938245-85-5

Editorial information

• Editor-in-chief: Davoren Chick, MD, FACP
• Hematology section editor: Karen Quillen, MD, MPH
• Senior deputy editor: Patrick C. Alguire, MD, FACP
• Deputy editor: Richard S. Eisenstaedt, MD, MACP

The hematology section is designed to address the learning needs of generalists and subspecialists outside hematology as well as clinicians who need a systematic review of blood disorders. The book's editorial committee includes physicians with experience in hematology, oncology, pathology, laboratory medicine, and internal medicine.

The publication also identifies a broader educational purpose: helping learners close gaps between their clinical practice and preferred standards of care, recognize less common or easily overlooked diseases, improve patient-safety decisions, and prepare for internal medicine certification and maintenance-of-certification examinations.

The printed volume is accompanied by information about the wider MKSAP educational program. Digital features described in the book's introductory material include self-assessment tools, individualized learning plans, and additional learning resources. Availability of particular digital features depends on the applicable MKSAP product and subscription.

WHAT THIS BOOK COVERS

The book organizes hematology around major clinical problems and disease categories. Its contents move from abnormal blood counts and bone marrow disorders to plasma-cell diseases, anemia, platelet abnormalities, bleeding, thrombosis, transfusion medicine, and hematologic issues in pregnancy.

1. Abnormal white blood cell counts

The opening section addresses the evaluation of nonmalignant leukopenia and leukocytosis, including lymphopenia, neutropenia, neutrophilia, lymphocytosis, and monocytosis.

These topics are useful for clinicians interpreting complete blood counts and deciding when an abnormal result may reflect a benign variation, medication effect, infection, inflammatory process, nutritional deficiency, or a more serious hematologic disorder.

The discussion also addresses the significance of persistent abnormalities and circumstances that warrant further investigation or referral.

2. Hematopoietic stem cells and bone marrow disorders

This section explains the role of hematopoietic stem cells in producing mature blood cells and examines disorders that disrupt normal blood-cell production.

Major topics include:

• Aplastic anemia and pure red cell aplasia.
• Myeloproliferative neoplasms.
• Chronic myeloid leukemia.
• Polycythemia vera and essential thrombocythemia.
• Primary myelofibrosis.
• Eosinophilia and hypereosinophilic syndrome.
• Mastocytosis.
• Myelodysplastic syndromes.
• Acute myeloid leukemia and acute lymphoblastic leukemia.
• Hematopoietic growth factors, stem cell transplantation, and cellular therapies.

For learners, this material provides a framework for understanding how abnormal blood counts can arise from impaired marrow function, clonal proliferation, or disordered cellular maturation. It also introduces diagnostic concepts involving genetic abnormalities and the distinction between reactive changes and hematologic malignancy.

3. Multiple myeloma and related disorders

The book devotes a section to plasma-cell disorders and related conditions. It covers the evaluation of monoclonal gammopathies, monoclonal gammopathy of undetermined significance (MGUS), multiple myeloma, immunoglobulin light-chain amyloidosis, Waldenström macroglobulinemia, and cryoglobulinemia.

This material is particularly relevant when clinicians encounter a monoclonal protein, unexplained anemia, or other findings that raise suspicion for a plasma-cell or lymphoplasmacytic disorder.

The section's structure supports a progression from recognizing a monoclonal gammopathy to considering its clinical significance and understanding the distinctions among related diagnoses.

4. Erythrocyte disorders and anemia

Anemia is a major component of the hematology curriculum. The book addresses the general approach to anemia before examining specific causes and mechanisms.

Topics include:

• Iron-deficiency anemia.
• Anemia of inflammation.
• Thalassemia.
• Anemia associated with kidney disease.
• Cobalamin (vitamin B12) deficiency.
• Folate deficiency.
• Hemolytic anemia.
• Intrinsic and extrinsic erythrocyte abnormalities.
• Primary or hereditary hemochromatosis.
• Secondary iron overload.

This organization is valuable for learning how to approach anemia systematically rather than memorizing individual conditions in isolation. It encourages consideration of the underlying mechanism, relevant laboratory findings, and the clinical context.

The separate coverage of hemolytic disorders and iron overload also helps readers distinguish problems involving red-cell destruction from those involving ineffective production, nutritional deficiency, or excess iron accumulation.

5. Platelet disorders

Platelet disorders are addressed through normal platelet physiology, the evaluation of thrombocytopenia, thrombocytopenic disorders, qualitative platelet abnormalities, acquired platelet dysfunction, and platelet function testing.

This material is important because a low platelet count does not have a single explanation. Clinicians must consider whether the abnormality reflects decreased production, increased destruction, or another mechanism, while also assessing the patient's bleeding risk and broader clinical presentation.

The section provides a foundation for understanding the investigation of platelet abnormalities and recognizing when additional evaluation is appropriate.

6. Bleeding disorders and hemostasis

The bleeding-disorders section covers normal hemostasis and the evaluation of patients with suspected bleeding disorders.

It includes:

• Congenital coagulation-factor deficiencies, including hemophilia A and B.
• Von Willebrand disease.
• Acquired bleeding disorders.
• Coagulopathy associated with liver disease.
• Disseminated intravascular coagulation (DIC).
• Vitamin K deficiency.
• Acquired von Willebrand disease.
• Acquired hemophilia.

These topics are relevant when evaluating unexplained bruising, mucosal bleeding, abnormal coagulation studies, or excessive bleeding after a procedure. They also help learners distinguish inherited disorders from acquired abnormalities associated with systemic illness or other underlying conditions.

7. Transfusion medicine

Transfusion medicine is another substantial component of the book. Its coverage includes blood donor screening, blood-group antigens, pretransfusion compatibility testing, the direct antiglobulin test, blood components, plasma derivatives, recombinant coagulation factors, blood management, transfusion complications, transfusion in special circumstances, and therapeutic apheresis.

The practical value of this section lies in its relevance to everyday hospital care. Physicians need to understand not only when blood products may be appropriate but also how compatibility testing, component selection, and recognition of transfusion reactions contribute to patient safety.

The inclusion of both routine transfusion practice and complications makes the subject relevant to general internists, hospitalists, and clinicians involved in acute care.

8. Thrombotic disorders

The book addresses thrombosis from its pathophysiology through risk assessment, diagnosis, prevention, and treatment.

Major areas include:

• Thrombophilia and thrombophilia testing.
• Inherited and acquired thrombophilias.
• Deep venous thrombosis (DVT).
• Pulmonary embolism (PE).
• Long-term complications of venous thromboembolism.
• Superficial vein thrombosis and thrombophlebitis.
• Unexplained arterial thrombosis.
• Upper-extremity deep venous thrombosis.
• Parenteral and oral anticoagulants.

These topics are particularly important in internal medicine, where clinicians frequently evaluate patients with suspected venous thromboembolism or must balance the benefits of anticoagulation against bleeding risk.

The inclusion of testing strategies and prevention alongside treatment encourages a broader approach to thrombotic disease rather than focusing only on drug selection.

9. Hematologic issues in pregnancy

The final major clinical area covers hematologic conditions in pregnancy, including gestational anemia, sickle cell disease, thrombocytopenia in pregnancy, gestational thrombocytopenia, immune thrombocytopenic purpura, microangiopathy of pregnancy, and thrombophilia and venous thromboembolism in pregnancy.

The pregnancy section includes epidemiology, pathophysiology, risk factors, prevention, diagnosis, and treatment of relevant thrombotic conditions.

This material is useful for clinicians who need to recognize how pregnancy changes the context in which anemia, platelet abnormalities, and thrombotic risks are evaluated.

Key Features

The book's principal educational strengths arise from its broad clinical scope and its integration of learning objectives with self-assessment.

• Broad hematology coverage: Addresses major red-cell, white-cell, platelet, coagulation, transfusion, and thrombotic disorders.
• Clinically oriented organization: Arranges material around recognizable clinical problems and disease categories.
• Diagnostic emphasis: Covers evaluation strategies for abnormal blood counts, monoclonal gammopathies, bleeding, and suspected thrombosis.
• Treatment discussions: Includes management topics across multiple hematologic conditions, as detailed in the individual sections.
• High Value Care recommendations: Highlights selected diagnostic and treatment decisions that balance clinical benefit against potential harm and cost.
• Self-assessment questions: Includes a hematology test with one-best-answer multiple-choice questions, answers, critiques, and bibliographies.
• Internal medicine examination relevance: The wider MKSAP 19 program was developed with ABIM certification and maintenance-of-certification requirements in mind.
• Hospital medicine relevance: The program integrates hospital-focused content and identifies selected hospitalist-oriented questions.
• Digital learning options: The introductory material describes customized quizzes, linked learning resources, multimedia content, and additional examination-preparation features in applicable digital products.

Who Should Read This Book?

Medical students

Medical students with an interest in internal medicine can use the book to organize their understanding of common hematologic presentations and the major categories of blood disease. Its breadth is especially useful for revising concepts across anemia, abnormal blood counts, hemostasis, and thrombosis.

However, the book's depth and examination-oriented approach may make it more suitable as a supplementary reference than as a first introduction to every hematology concept.

Interns and junior doctors

Interns can benefit from reviewing the clinical approach to anemia, thrombocytopenia, leukocyte abnormalities, and suspected venous thromboembolism. These problems frequently arise during routine inpatient and outpatient work.

The book can also support structured revision when a clinical encounter reveals a gap in the learner's understanding.

Internal medicine residents

Residents are among the most relevant readers for this resource. The book's combination of clinical topics, diagnostic considerations, management principles, and multiple-choice questions fits the needs of trainees consolidating their internal medicine knowledge.

It can be incorporated into a rotation-based study schedule or used for targeted review of weaker areas.

Hematology specialists

Hematologists may find the book useful as a concise review of the broad hematology curriculum and as a resource for revisiting topics that intersect with general internal medicine.

Because the work is designed for the broader MKSAP learning program, it should not automatically be treated as a replacement for specialist references, detailed disease-specific guidelines, or dedicated hematology texts.

Exam candidates

For physicians preparing for the ABIM Internal Medicine Certification Examination or related maintenance-of-certification activities, the self-assessment approach is a particular strength. The wider MKSAP program also describes CME/MOC functionality for eligible subscribers.

Why This Book Is Useful

Clinical relevance

One of the book's most useful features is its attention to problems encountered outside specialist hematology practice. An internist may need to investigate an unexplained blood-count abnormality, determine whether a monoclonal gammopathy requires further evaluation, or assess a patient for bleeding or thrombosis.

The book's coverage of these presentations helps connect hematologic knowledge to the decisions clinicians face in routine care.

Evidence-informed learning

The introductory material explains that MKSAP 19's educational development incorporated emerging internal medicine knowledge, learner feedback, and ABIM examination requirements. It also describes peer review and the use of evidence and updated clinical-care guidelines where available.

These are important features of an educational program intended to support professional learning. Nevertheless, the publication's 2022 date matters: readers should verify current guidelines, drug information, and clinical recommendations before applying them in practice.

Practical application

The book can support several practical learning activities:

1. Review a topic after encountering a relevant patient presentation.
2. Revisit the diagnostic approach to an abnormal laboratory result.
3. Compare the distinguishing features of related hematologic disorders.
4. Work through the self-assessment questions to identify gaps in knowledge.
5. Revisit incorrect answers and use the accompanying explanations and bibliographies to guide further study.

This approach makes the book useful as part of a recurring learning routine rather than only as a reference consulted before an examination.

Board examination preparation

The MKSAP program explicitly identifies preparation for ABIM certification and maintenance-of-certification examinations among its educational objectives. Its multiple-choice questions are intended to reinforce the clinical knowledge assessed in internal medicine learning and assessment.

For examination candidates, the greatest benefit is likely to come from combining topic review with active question practice. Readers should not assume that completing one section guarantees examination readiness; the hematology volume represents only one part of the wider internal medicine curriculum.

Learning efficiency and high-value care

The inclusion of High Value Care (HVC) recommendations is another notable feature. These recommendations focus on balancing potential clinical benefit with cost and harm.

This framework is useful for developing a more thoughtful approach to diagnostic testing and treatment. It encourages learners to consider not only what can be done but also whether an intervention is appropriate in a particular clinical situation.

The book's topic-based structure can also help readers direct their revision toward specific areas of weakness, rather than repeatedly reviewing material they already understand.

Table of Contents Overview

The following overview follows the major sections and chapter headings listed in MKSAP 19: Hematology.

Major section	Topics covered
Nonmalignant leukocyte disorders	Leukopenia, leukocytosis, neutropenia, lymphopenia, and abnormal white-cell counts
Hematopoietic stem cell disorders	Bone marrow failure, myeloproliferative neoplasms, myelodysplastic syndromes, acute leukemias, and stem cell transplantation
Multiple myeloma and related disorders	Monoclonal gammopathies, multiple myeloma, light-chain amyloidosis, Waldenström macroglobulinemia, and cryoglobulinemia
Erythrocyte disorders	Anemia, iron deficiency, nutritional deficiencies, thalassemia, and hemolytic disorders
Iron overload syndromes	Hereditary hemochromatosis and secondary iron overload
Platelet disorders	Thrombocytopenia, platelet destruction, and qualitative platelet dysfunction
Bleeding disorders	Hemophilia, von Willebrand disease, DIC, liver-related coagulopathy, and acquired factor deficiencies
Transfusion medicine	Blood components, compatibility testing, transfusion reactions, blood management, and therapeutic apheresis
Thrombotic disorders	Thrombophilia, DVT, PE, anticoagulants, and other sites of thrombosis
Hematologic issues in pregnancy	Gestational anemia, sickle cell disease, pregnancy-associated thrombocytopenia, and thromboembolism

The printed volume also includes a hematology self-assessment test, answers and critiques, bibliographic material, and an index. The table above summarizes the organization rather than reproducing every individual subsection.

Strengths of the Book

1. Broad coverage of clinical hematology

A major strength is the range of conditions addressed within one volume. Readers can move between common problems, such as iron-deficiency anemia, and more complex disorders, such as acute leukemia, plasma-cell diseases, and acquired bleeding conditions.

This breadth is particularly relevant to general internists, who must recognize and initially evaluate many hematologic conditions before determining whether specialist referral is necessary.

2. A structured approach to clinical problems

The organization encourages readers to think in terms of clinical presentations and diagnostic categories. Sections on abnormal blood counts, anemia, thrombocytopenia, bleeding, and thrombosis are especially relevant to the initial evaluation of patients.

For learners, this structure can make it easier to connect laboratory abnormalities with possible mechanisms and appropriate next steps.

3. Integration of self-assessment

The inclusion of multiple-choice questions, answers, critiques, and bibliographies adds an active-learning component to the reading experience.

Instead of relying entirely on passive reading, learners can test their understanding, identify errors, and revisit topics that require additional attention. This is useful for both examination preparation and ongoing professional development.

4. Attention to high-value clinical decisions

The High Value Care recommendations are an important educational feature. They address decisions in which unnecessary testing or treatment may add cost or harm without improving patient outcomes.

This emphasis supports thoughtful clinical practice and reinforces the importance of selecting investigations and interventions according to the patient's clinical context.

5. Relevance to hospital and outpatient medicine

The content spans problems encountered in ambulatory practice and hospital care. This makes the book potentially useful across different stages of internal medicine training.

Its coverage of transfusion complications, thromboembolism, marrow disorders, and pregnancy-associated hematologic problems also gives readers opportunities to review topics that may arise in more specialized clinical settings.

Limitations

A balanced assessment should consider the book's scope, publication date, and intended educational purpose.

• Publication date: The 2022 publication date means that some clinical recommendations, diagnostic approaches, or treatment options may have changed. Current guidance should be checked before clinical application.
• Broad rather than exclusively specialist-focused: The volume covers a wide hematology curriculum for internal medicine learners. It should not automatically be considered a substitute for comprehensive specialist references on complex hematologic malignancies or rare disorders.
• Examination-oriented approach: Readers seeking an introductory, highly visual explanation of every hematology concept may need a complementary resource suited to their learning level.
• Limited format in print: Digital features described in the introductory material are associated with the broader MKSAP program. The extent of access depends on the relevant edition or subscription, so readers should not assume that every digital feature is included with the printed volume.
• Not a substitute for current clinical guidance: The book is an educational resource. Decisions involving diagnosis, medication selection, dosing, transfusion, and anticoagulation require consideration of current guidance and individual patient circumstances.

The available bibliographic and introductory material does not establish a formal reader-satisfaction rating, comparative clinical-outcome benefit, or independent ranking against competing textbooks. These should not be inferred.

Comparison With Similar Books

MKSAP 19: Hematology is best understood as a clinically oriented internal medicine education and self-assessment resource. Its broad scope and examination-focused design distinguish its intended purpose from that of a dedicated specialist textbook.

Resource type	Main educational purpose	How MKSAP 19: Hematology fits
General hematology textbook	Detailed study of hematologic diseases and underlying mechanisms	MKSAP offers broad clinical review, but the depth of coverage may differ
Hematology examination question bank	Repeated practice with assessment questions	MKSAP combines topic-based content with self-assessment
Internal medicine review resource	Consolidation of knowledge across internal medicine specialties	This is closely aligned with MKSAP's overall educational purpose
Clinical guidelines	Recommendations for specific clinical decisions	MKSAP supports learning, while current guidelines may be needed for up-to-date decisions

This compares educational purposes, not a verified head-to-head evaluation of named publications. The available material does not provide sufficient comparative evidence to rank MKSAP against specific competing hematology textbooks.

For an internal medicine resident, MKSAP may work well as a structured review and question-practice resource. A hematology fellow or specialist conducting an in-depth investigation of a complex disorder may need more detailed disease-specific references alongside it.

MKSAP 19 Hematology (2022)

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FAQs

1. What is MKSAP 19: Hematology?

MKSAP 19: Hematology is a 2022 medical education and self-assessment volume published by the American College of Physicians. It covers major hematologic disorders and includes a self-assessment test with answers, critiques, and bibliographies.

2. Who should read MKSAP 19: Hematology?

The book is particularly relevant to internal medicine residents, practicing internists, hospitalists, and physicians preparing for internal medicine certification or maintenance-of-certification activities. Medical students and other healthcare professionals may also benefit from selected sections, depending on their learning objectives.

3. What topics are covered in MKSAP 19: Hematology?

The book covers abnormal white blood cell counts, bone marrow disorders, multiple myeloma, anemia, erythrocyte disorders, platelet abnormalities, bleeding disorders, transfusion medicine, thrombosis, anticoagulants, and hematologic conditions associated with pregnancy.

4. Is MKSAP 19: Hematology useful for board exam preparation?

Yes. The broader MKSAP program was developed with ABIM certification and maintenance-of-certification requirements in mind. The hematology volume includes a self-assessment test that can help learners identify knowledge gaps. It should be used alongside a comprehensive study plan for the relevant examination.

5. Does MKSAP 19: Hematology include practice questions?

Yes. The printed volume contains a hematology self-assessment test featuring one-best-answer multiple-choice questions. Answers, critiques, and bibliographies immediately follow the questions.

6. Is MKSAP 19: Hematology suitable for clinical practice?

It can support clinical learning and review of hematologic conditions encountered in practice. However, because it was published in 2022, readers should verify current guidelines and drug information before applying recommendations to individual patients.

7. Does MKSAP 19: Hematology cover transfusion medicine and anticoagulation?

Yes. Its contents include blood-group antigens, pretransfusion compatibility testing, blood components, transfusion complications, therapeutic apheresis, thrombotic disorders, DVT, PE, and parenteral and oral anticoagulants.

8. What is the difference between MKSAP 19: Hematology and a specialist hematology textbook?

MKSAP 19: Hematology is designed as part of a broader internal medicine learning and self-assessment program. A specialist hematology textbook may offer greater depth in selected diseases or laboratory methods. The best choice depends on whether the reader needs broad clinical review, examination practice, or detailed specialist-level reference material.

Conclusion

MKSAP 19: Hematology is a broad clinical education resource for physicians who want to strengthen their understanding of hematologic disorders within internal medicine. Published by the American College of Physicians in 2022, it brings together major topics ranging from abnormal blood counts and anemia to hematologic malignancies, platelet dysfunction, transfusion medicine, and thromboembolism.

Its principal educational strengths are the breadth of its coverage, its clinically oriented organization, its attention to High Value Care, and the inclusion of self-assessment questions with answers and explanations. These features make it particularly relevant to internal medicine residents, practicing internists, and examination candidates.

The book is most useful when readers combine focused topic review with active question practice and follow up on areas of uncertainty. It can also serve as a supplementary reference for clinicians reviewing common hematologic presentations and the principles underlying their evaluation.

Its 2022 publication date should be considered when using the material for patient care. Current clinical guidelines and prescribing information remain important for confirming recommendations that may have changed.

Overall, MKSAP 19: Hematology is a useful option for structured hematology review and internal medicine self-assessment, especially for learners who value a combination of clinical content and examination-oriented learning. Readers seeking extensive specialist-level detail may wish to supplement it with dedicated hematology references.

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