Hematopathology Practice Questions

Q: Which of the following findings is diagnostic of iron deficiency anemia?

Increased TIBC, decreased serum ferritin. ***Increased TIBC, decreased serum ferritin*** - **Iron deficiency anemia** is characterized by depleted iron stores, leading to a **decreased serum ferritin** level, which is the most sensitive and specific marker for iron deficiency [4]. - In response to low iron stores, the body upregulates iron absorption and transport mechanisms, resulting in an **increased Total Iron Binding Capacity (TIBC)**, as there are more transferrin molecules available to bind iron [1]. *Decreased TIBC, decreased serum ferritin* - While a **decreased serum ferritin** is consistent with iron deficiency, a **decreased TIBC** is more indicative of **anemia of chronic disease** [1], where the body sequesters iron, leading to reduced iron availability for binding. - In **anemia of chronic disease**, both ferritin (an acute phase reactant) and TIBC can be reduced due to the inflammatory state [1], [2]. *Increased TIBC, increased serum ferritin* - An **increased TIBC** is seen in iron deficiency, but an **increased serum ferritin** indicates adequate or even **overloaded iron stores**, which contradicts the diagnosis of iron deficiency anemia. - High ferritin levels can be seen in conditions like **hemochromatosis** (iron overload) or **inflammation**, where ferritin acts as an acute phase reactant [5]. *Decreased TIBC, increased serum ferritin* - This combination is typical of **anemia of chronic disease**, where inflammation causes **increased serum ferritin** (as an acute phase reactant) and a **decreased TIBC** due to reduced production of transferrin [1]. - In this type of anemia, iron is often trapped within macrophages, making it unavailable for erythropoiesis despite seemingly normal or elevated stores [3].

Q: Which antigen is tested in routine Rh typing?

D antigen. ***D antigen*** - Routine Rh typing specifically tests for the **D antigen**, which determines the Rh status of an individual as Rh-positive or Rh-negative [1]. - The presence of the **D antigen** is crucial for blood transfusions and pregnancy management [1]. *A antigen* - The **A antigen** is tested in the context of the ABO blood group system, not specifically for Rh typing. - It does not provide information regarding the Rh factor which is critical in blood compatibility. *C antigen* - Similar to the **A antigen**, the **C antigen** is part of the broader Rh system but is not routinely assessed in standard Rh typing. - Its testing is typically reserved for specific clinical scenarios involving Rh incompatibility. *B antigen* - The **B antigen** pertains to the ABO blood group and does not relate to the Rh factor or routine Rh typing. - Rh typing is solely focused on the **presence of the D antigen** to determine the Rh status. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 627-628.

Q: Which antibody is primarily associated with warm autoimmune hemolytic anemia (AIHA)?

IgG. ***IgG*** - **Warm autoimmune hemolytic anemia (AIHA)** is primarily associated with **IgG antibodies**, which mediate hemolysis at body temperature [1]. - IgG antibodies typically bind to red blood cells and lead to their destruction by the **reticuloendothelial system** [1]. *IgM* - Often involved in **cold agglutinin disease**, not warm AIHA, as it primarily reacts at lower temperatures [2]. - Usually results in **hemolysis** in peripheral areas, like the extremities, rather than at normal body temperature [2]. *IgD* - Known primarily as a marker on **B cells**, it plays a minimal role in hemolytic anemia and is not involved in antibody-mediated hemolysis. - Lack of significant **serological presence** in autoimmune hemolytic processes makes it an unlikely candidate. *IgE* - Primarily associated with **allergic reactions** and parasitic infections rather than autoimmune hemolytic conditions [2]. - Does not typically participate in **hemolysis** or bind to red blood cells in AIHA.

Q: What does ristocetin testing indicate in von Willebrand disease?

Decreased agglutination. ***Decreased agglutination*** - In von Willebrand disease, **ristocetin induces less agglutination** due to a deficiency or dysfunction of von Willebrand factor. - This results in **impaired platelet adhesion** [1], crucial for effective hemostasis. *Increased agglutination* - Would suggest an increased platelet interaction, which is **not characteristic of von Willebrand disease**. - It can occur in conditions with enhanced von Willebrand factor, unlike in this case. *No agglutination* - Suggests complete lack of platelet interaction, which is **not typical** in von Willebrand disease. - There is often some level of interaction, albeit reduced, not a total absence of agglutination. *Normal agglutination* - Indicates no abnormalities, which **contradicts the known pathology** of von Willebrand disease. - Patients typically demonstrate decreased levels of agglutination, not normal findings in this test.

Q: The most common translocation seen in patients with Multiple Myeloma is:

t(11;14). ***t(11;14)*** - This translocation is the **most common cytogenetic abnormality** found in patients with multiple myeloma, occurring in approximately 15-20% of cases. - It results in the juxtaposition of the **IgH gene on chromosome 14** with the **cyclin D1 gene on chromosome 11**, leading to overexpression of cyclin D1. *t(4;14)* - This translocation, occurring in about 5-10% of patients, is associated with a **poor prognosis** in multiple myeloma. - It involves the IgH gene on chromosome 14 and the **FGFR3 and MMSET genes on chromosome 4**, leading to their upregulation. *t(14;16)* - This translocation is also associated with a **poor prognosis** and is less common than t(11;14) or t(4;14), found in about 2-5% of cases. - It involves the **IgH gene on chromosome 14** and the **c-MAF gene on chromosome 16**, leading to overexpression of c-MAF. *t(14;20)* - This translocation is **rarely observed** in multiple myeloma patients, typically occurring in less than 1% of cases. - It involves the **IgH gene on chromosome 14** and the **MAFB gene on chromosome 20**, which can also contribute to disease progression.

Q: ABO isoantibodies are of which class?

IgM. ***IgM*** - Naturally occurring **ABO isoantibodies** are predominantly of the **IgM class**. - These **pentameric antibodies** are highly effective at causing **agglutination** of incompatible red blood cells, which is crucial in transfusion reactions [1]. *IgG* - While IgG antibodies can be formed against ABO antigens (e.g., in hemolytic disease of the newborn), the **naturally occurring isoantibodies** are primarily IgM. - IgG antibodies are **monomeric** and can cross the **placenta**, which is a key difference from the primary IgM ABO antibodies. *IgD* - **IgD** antibodies are primarily found on the surface of **B cells** and play a role in B cell activation. - They are **not a primary mediator** of ABO isoantibody response or red blood cell agglutination. *IgA* - **IgA** antibodies are predominantly found in **mucosal secretions** and play a role in mucosal immunity. - While some IgA may be present, it is **not the predominant class** for naturally occurring ABO isoantibodies involved in transfusion reactions. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 154-155.

Q: The most common subtype of Non-Hodgkin's lymphoma in India is:

Diffuse large B cell lymphoma. ***Diffuse large B cell lymphoma*** - It is the most common subtype of **Non-Hodgkin's lymphoma** observed in India, reflecting a higher prevalence in the population. - Characterized by **aggressive clinical behavior** [1] and typically presents as a rapidly enlarging mass, often involving lymph nodes or extranodal sites. *Burkitt's lymphoma* - This subtype is known for its **high proliferation rate** and is more common in specific demographics, such as children and immunocompromised individuals. - It typically presents with **jaw lesions** or abdominal masses, which is not typical in the broader Indian population. *Diffuse small cell lymphocytic lymphoma* - More accurately classified as **chronic lymphocytic leukemia** (CLL), it is not the most common subtype of Non-Hodgkin's lymphoma. - Characterized by a **milder clinical course** and presents with lymphocytosis in peripheral blood, lacking aggressive features. *Follicular lymphoma* - This is usually a **low-grade lymphoma** associated with **indolent behavior** and may not be the most commonly diagnosed subtype in India. - It typically involves multiple lymph nodes and is characterized by **nodular patterns on histology**, making it less prevalent than diffuse large B cell lymphoma. Follicular lymphoma is rare in Asian populations [2]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 563-564. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, pp. 602-604.

Q: Which of the following statements about sickle cell anemia is false?

Ringed sideroblasts are associated with sickle cell anemia.. ***Ringed sideroblast*** - **Ringed sideroblasts** are not typically associated with sickle cell anemia; they are indicative of disorders like **sideroblastic anemia**. - In sickle cell anemia, the primary findings include **hemolysis** and ineffective erythropoiesis, not ringed sideroblasts [3]. *Howell jolly bodies* - These bodies are remnants of nuclear material and can be found in individuals with **spleen dysfunction**, which can occur in sickle cell anemia [1]. - They are actually a common finding due to **hyposplenism** or **asplenia** in patients with sickle cell disease [2]. *Sickle cells* - The presence of **sickle-shaped red blood cells** is a hallmark of sickle cell anemia, caused by the mutation in the **beta-globin chain** [3]. - These sickle cells are responsible for the characteristic complications of the disease, such as **vaso-occlusive crises** [1][3]. *Target cells* - Target cells, or **codocytes**, are often seen in disorders like **thalassemia** and liver disease, and can also be present in sickle cell anemia. - They are formed due to an increase in the **surface area to volume ratio** of red blood cells, often secondary to **membrane abnormalities** seen in sickle cell changes [2]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, pp. 644-646. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 570-571. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 598-599.

Q: What is the typical bone marrow finding in myelofibrosis?

Dry tap (hypocellular). ***Dry tap (hypocellular)*** - In myelofibrosis, the bone marrow is often **hypocellular** due to fibrosis [1][2], leading to a **dry tap** during aspiration. - The presence of **reticulin** and collagen deposition replaces normal hematopoietic cells [2], resulting in ineffective hematopoiesis. *Thrombocytosis* - Myelofibrosis typically leads to **thrombocytopenia**, not thrombocytosis, due to ineffective megakaryopoiesis and splenic sequestration. - Though elevated platelets can occur, they are generally a **secondary response** to the disease and not a hallmark finding. *Megaloblastic cells* - Megaloblastic changes are associated with **vitamin B12** or **folate deficiencies**, which do not occur in myelofibrosis. - In myelofibrosis, the predominant issue is **marrow fibrosis** [1][2], which does not lead to megaloblastosis. *Microcytic cells* - Microcytic cells are commonly linked to **iron deficiency anemia**, not myelofibrosis. - Myelofibrosis typically results in **variable red cell morphology** [1], but microcytic anemia is not a primary characteristic. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, pp. 628-629. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 615-616.

Question 1

Which of the following findings is diagnostic of iron deficiency anemia?

Accepted Answer

Increased TIBC, decreased serum ferritin

Answer

Decreased TIBC, decreased serum ferritin

Answer

Increased TIBC, increased serum ferritin

Answer

Decreased TIBC, increased serum ferritin

Question 2

Which antigen is tested in routine Rh typing?

Accepted Answer

D antigen

Answer

C antigen

Answer

A antigen

Answer

B antigen

Question 3

Which antibody is primarily associated with warm autoimmune hemolytic anemia (AIHA)?

Accepted Answer

IgG

Answer

IgE

Answer

IgM

Answer

IgD

Question 4

What does ristocetin testing indicate in von Willebrand disease?

Accepted Answer

Decreased agglutination

Answer

Normal agglutination

Answer

Increased agglutination

Answer

No agglutination

Question 5

The most common translocation seen in patients with Multiple Myeloma is:

Accepted Answer

t(11;14)

Answer

t(14;16)

Answer

t(4;14)

Answer

t(14;20)

Question 6

ABO isoantibodies are of which class?

Accepted Answer

IgM

Answer

IgG

Answer

IgD

Answer

IgA

Question 7

The most common subtype of Non-Hodgkin's lymphoma in India is:

Accepted Answer

Diffuse large B cell lymphoma

Answer

Diffuse small cell lymphocytic lymphoma

Answer

Follicular lymphoma

Answer

Burkitt's lymphoma

Question 8

What is the Thomsen Friedenreich phenomenon?

Accepted Answer

Exposure of cryptic T-antigen on red blood cells

Answer

Agglutination of red blood cells by all blood group sera

Answer

Agglutination of red blood cells by anti-T antibodies

Answer

Association with certain malignancies

Question 9

Which of the following statements about sickle cell anemia is false?

Accepted Answer

Ringed sideroblasts are associated with sickle cell anemia.

Answer

Sickle cells are present in sickle cell anemia.

Answer

Target cells are commonly seen in sickle cell anemia.

Answer

Howell Jolly bodies can be found in sickle cell anemia.

Question 10

What is the typical bone marrow finding in myelofibrosis?

Accepted Answer

Dry tap (hypocellular)

Answer

Megaloblastic cells

Answer

Microcytic cells

Answer

Thrombocytosis

Hematopathology — MCQs

Hematopathology — MCQs

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