Hematopathology Practice Questions

Q: Which of the following is a characteristic feature of Hereditary Spherocytosis?

Increased Osmotic Fragility. ***Direct Coomb's Positive*** - In hereditary spherocytosis, the **Coomb's test is typically negative**, indicating that the hemolysis is non-immune. - The condition is primarily due to defects in **red blood cell membrane proteins** [2], not autoimmune mechanisms. *Increased Osmotic Fragility* - A hallmark of hereditary spherocytosis; these red blood cells are more **sensitive to osmotic changes** due to their spherical shape [2]. - This fragility is used in clinical tests to help diagnose the condition [1]. *Gall stones* - Patients with hereditary spherocytosis may develop **pigment gallstones** due to chronic hemolysis and excess bilirubin [1]. - This is a common complication resulting from increased breakdown of red blood cells. *Splenomegaly* - Often presents in hereditary spherocytosis as the spleen works harder to clear **damaged red blood cells** [2]. - Splenomegaly is a common clinical feature due to the increased workload on the spleen. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 597-598. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, pp. 640-641.

Q: In which condition is Hemoglobin F typically elevated?

Beta-thalassemia. ***Beta-thalassemia*** - In **beta-thalassemia**, there is reduced or absent synthesis of beta-globin chains, leading to an excess of alpha-globin chains. - To compensate, the body markedly increases production of fetal hemoglobin (**HbF**, α2γ2), which can constitute **50-90% of total hemoglobin** in beta-thalassemia major. - This compensatory mechanism helps alleviate the severity of anemia and ineffective erythropoiesis, making elevated HbF a **defining laboratory feature** of beta-thalassemia. *Hereditary spherocytosis* - This condition is characterized by defects in **erythrocyte membrane proteins** (spectrin, ankyrin, band 3), leading to fragile, spherical red blood cells. - While it causes **hemolytic anemia**, it does not involve elevated HbF levels; the defect is structural, not related to globin chain synthesis. *Congenital red cell aplasia* - This condition (e.g., **Diamond-Blackfan anemia**) involves a primary defect in early **erythroid progenitor cells**, leading to severe anemia. - While some patients may have elevated HbF, it is not a consistent or defining feature; the main problem is the lack of adequate red blood cell production, not a compensatory shift in globin synthesis. *Sickle cell disease* - In **sickle cell disease**, there is an abnormal beta-globin chain leading to the production of **hemoglobin S (HbS)**. - While HbF is indeed elevated in most patients (typically **2-15%**, compared to <1% in normal adults), the elevation is **less marked and consistent** compared to beta-thalassemia. - The primary defect is the presence of HbS, and while HbF elevation provides some clinical benefit (it inhibits HbS polymerization), beta-thalassemia remains the condition most characteristically associated with high HbF levels.

Q: Which of the following is not typically screened for in blood donations?

Epstein-Barr Virus (EBV). ***Epstein-Barr Virus (EBV)*** ✓ - EBV is **NOT routinely screened** for in blood donations in India and most countries - While EBV is a common virus (>90% adults are seropositive), it is **not considered a major transfusion-transmitted infection** - The virus is primarily transmitted through saliva; transfusion-associated EBV transmission is **extremely rare and usually not clinically significant** in immunocompetent recipients - Risk-benefit analysis does not support routine screening due to **high prevalence, low clinical impact, and cost considerations** - EBV screening may only be considered for specific recipients (e.g., severely immunocompromised patients) *HIV* - **Routinely screened** in all blood donations worldwide - Screening includes HIV-1 and HIV-2 antibodies and/or HIV antigen/RNA testing - Transfusion-transmitted HIV causes AIDS with severe consequences - Mandatory screening under the Drugs and Cosmetics Act in India *HBV* - **Routinely screened** in all blood donations - Screening includes HBsAg (Hepatitis B surface antigen) testing, and often anti-HBc or HBV DNA - Can cause acute and chronic hepatitis, cirrhosis, and hepatocellular carcinoma - Mandatory screening in India and globally *HCV* - **Routinely screened** in all blood donations - Screening includes anti-HCV antibodies and/or HCV RNA (nucleic acid testing) - Major cause of chronic hepatitis, cirrhosis, and liver cancer - Mandatory screening under blood safety regulations

Q: Which of the following best describes the shape of Birbeck granules?

Resembling a tennis racket. ***Tennis racket*** [1] - Birbeck granules are distinctive for their **tennis racket shape**, consisting of an elongated area and a bulbous end [1]. - They are typically found in **Langerhans cell histiocytosis** and are associated with **CD1a+** staining [1]. *Bat* - The term "bat" does not accurately describe the structure or morphology of Birbeck granules. - Unlike bats, Birbeck granules have a **specific elongated shape** with a bulbous tip rather than bat wings. *Hockey stick* - This shape implies a straight handle and a flat blade, which does not represent the **widely tapered ends** of Birbeck granules. - The **characteristic morphology** does not align with any hockey stick features. *Ball* - The term "ball" indicates a spherical shape, which is not fitting for Birbeck granules, as they are **elongated** and striated. - Birbeck granules are defined specifically by their **tapered structure**, contrasting markedly with a circular form. **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, p. 630.

Q: Which condition is commonly associated with Disseminated Intravascular Coagulation (D.I.C.)?

Acute promyelocytic leukemia. ***Acute promyelocytic leukemia*** - **Disseminated Intravascular Coagulation (D.I.C.)** is commonly associated with acute promyelocytic leukemia due to the release of **tissue factor** from promyelocytes [1]. - Patients typically present with **severe bleeding** and coagulopathy [1], driven by the rapid proliferation of these abnormal cells. *Acute myelomonocytic leukemia* - While this type of leukemia presents with myelomonocytic features, it is less frequently associated with **D.I.C.** compared to acute promyelocytic leukemia. - This condition is often characterized by **monocytic infiltration** but does not typically cause the severe coagulopathy associated with D.I.C. *Autoimmune hemolytic anemia* - This condition causes **hemolysis** due to antibodies but is mainly associated with **anemia**, not a coagulation disorder like D.I.C. - **D.I.C.** involves widespread **consumption coagulopathy** [1], which is not a feature of autoimmune hemolytic anemia. *CMC* - CMC refers to **Chronic Myeloid Leukemia**, which does not commonly lead to **D.I.C.** and presents primarily with splenomegaly and **chronic symptoms**. - The coagulation profile in CMC tends to be stable, with no link to the acute coagulopathy seen in D.I.C.

Q: Which acquired condition is most commonly associated with spherocytes?

Autoimmune hemolytic anemia (AIHA). ***Autoimmune haemolytic anemia*** - This condition is characterized by the **production of antibodies** against the patient's own red blood cells, leading to **destruction** and the formation of spherocytes [1]. - The presence of ***maximum spherocytes*** in blood smears is a hallmark of this disorder due to **extravascular hemolysis** [1]. *Aplastic anemia* - Aplastic anemia is mainly due to **failure of hematopoiesis**, resulting in pancytopenia rather than spherocyte formation. - It typically presents with **normocytic** or **macrocytic anemia**, not spherocytes, as the bone marrow is not producing enough red blood cells [2]. *Vit B12 deficiency* - Vit B12 deficiency usually causes **macrocytic anemia** characterized by **megaloblastic changes** in the bone marrow and peripheral blood, not the formation of spherocytes. - The primary indicators would be **hypersegmented neutrophils** and large, ovalocytes rather than spherocytes. *None* - This option incorrectly implies that no condition causes maximum spherocytes, while autoimmune hemolytic anemia is the known condition for this finding. - Spherocytes are a specific sign in hemolytic processes and are definitely seen in conditions like **autoimmune hemolytic anemia**. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 602-603. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, pp. 662-663.

Q: In which type of Hodgkin's Lymphoma are lacunar cells typically observed?

Nodular Sclerosis type. ***Nodular Sclerosis Type*** - **Lacunar cells** are characteristically seen in **Nodular Sclerosis Hodgkin lymphoma**, which is the most common subtype [1][3]. - These cells are large **Reed-Sternberg cells** with a distinctive morphology, typically found in **fibrous areas** of the lymph node [1]. *Mixed cellularity type* - This subtype is associated with a diverse cell population but does not primarily feature **lacunar cells** [2][4]. - It predominantly contains **Reed-Sternberg cells** without the specific morphology seen in nodular sclerosis [2]. *Lymphocyte predominant* - Lymphocyte predominant type mainly consists of **lymphocytes** with few Reed-Sternberg cells, and lacks **lacunar cells** [5]. - The histology is significantly different, exhibiting a more lymphocytic composition and not the classic lucent spaces [5]. *All of the above* - This option is incorrect as neither **Mixed cellularity** nor **Lymphocyte predominant** types contain **lacunar cells** [2][4][5]. - Lacunar cells are a distinctive feature solely of the **Nodular Sclerosis type** in Hodgkin lymphoma [1]. **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, p. 616. [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. 616-618. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 558-559. [4] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 559-560. [5] 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, p. 618.

Q: What type of anaemia is primarily associated with leukaemia?

Myelophthisic anaemia. ***Myelophthisic anaemia*** - This condition arises from the **displacement of normal hematopoietic tissue** in the bone marrow by abnormal cells, like those seen in leukaemia, leading to **extramedullary hematopoiesis**. - Marrow infiltration causes **pancytopenia** and often results in the presence of **immature granulocytes** and **nucleated red blood cells** in the peripheral blood (leukoerythroblastosis). *Iron deficiency anaemia* - This type of anaemia is caused by insufficient iron for **hemoglobin synthesis**, often due to chronic blood loss or inadequate dietary intake. - While leukaemia patients can develop iron deficiency due to bleeding, it is not the **primary type of anaemia** directly resulting from the marrow infiltration by leukaemic cells. *Megaloblastic anaemia* - Characterized by the production of abnormally large, immature red blood cells, primarily due to **vitamin B12** or **folate deficiency**. - There is no direct causal link between leukaemia and the development of megaloblastic anaemia as a **primary haemato-pathological mechanism**. *Aplastic anaemia* - Characterized by **pancytopenia** due to bone marrow failure with hypocellular marrow, not marrow infiltration. - While both leukaemia and aplastic anaemia can present with cytopenias, aplastic anaemia shows a **hypocellular marrow** whereas leukaemia shows a **hypercellular marrow** with infiltration by malignant cells.

Q: What is the chromosomal translocation associated with Acute Myeloid Leukemia M3?

t(15;17). ***T (15,17)*** [1][2][3] - This translocation pertains to **Acute Promyelocytic Leukemia (APL)**, associated with the fusion gene **PML-RARA** [1][3]. - APL is characterized by **promyelocytes** with heavy granulation and a clinical presentation that includes coagulopathy [2][3]. *T (8, 21)* - This translocation is associated with **AML M2**, involving the **RUNX1-RUNX1T1** fusion gene [3]. - It does not correlate with the classic features of AML M3, which is specifically characterized by T (15,17). *T (9,11)* - Primarily seen in **AML M5**, this translocation is not related to the pathophysiology of AML M3. - The fusion commonly observed here is **MLL-AFF1**, which affects different types of leukemias, not APL. *T (18,21)* - This translocation does not have a significant association with any specific type of acute myeloid leukemia. - Unlike T (15,17), it is not linked to the classic features or unique clinical presentation seen in AML M3. **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. 620-621. [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. 621-622. [3] 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, p. 620.

Question 1

Which of the following is a characteristic feature of Hereditary Spherocytosis?

Accepted Answer

Increased Osmotic Fragility

Answer

Splenomegaly

Answer

Gallstones

Answer

Direct Coombs Test Negative

Question 2

All the following are true about multiple myeloma except for which of the following?

Accepted Answer

Chromosomal translocation t(8;14), commonly seen in Burkitt's lymphoma

Answer

Hypercalcemia

Answer

Presence of Bence-Jones proteins in urine

Answer

Osteolytic bone disease

Question 3

In which condition is Hemoglobin F typically elevated?

Accepted Answer

Beta-thalassemia

Answer

Congenital red cell aplasia

Answer

Hereditary spherocytosis

Answer

Sickle cell disease

Question 4

Which of the following is not typically screened for in blood donations?

Accepted Answer

Epstein-Barr Virus (EBV)

Answer

HIV

Answer

HBV

Answer

HCV

Question 5

Which of the following best describes the shape of Birbeck granules?

Accepted Answer

Resembling a tennis racket

Answer

Resembling a hockey stick

Answer

Resembling a bat

Answer

Resembling a ball

Question 6

Which condition is commonly associated with Disseminated Intravascular Coagulation (D.I.C.)?

Accepted Answer

Acute promyelocytic leukemia

Answer

Acute myelomonocytic leukemia

Answer

Chronic myeloid leukemia

Answer

Autoimmune hemolytic anemia

Question 7

Which acquired condition is most commonly associated with spherocytes?

Accepted Answer

Autoimmune hemolytic anemia (AIHA)

Answer

Vitamin B12 deficiency anemia

Answer

Aplastic anemia

Answer

None of the options

Question 8

In which type of Hodgkin's Lymphoma are lacunar cells typically observed?

Accepted Answer

Nodular Sclerosis type

Answer

Mixed cellularity type

Answer

Lymphocyte predominant type

Answer

All of the options

Question 9

What type of anaemia is primarily associated with leukaemia?

Accepted Answer

Myelophthisic anaemia

Answer

Aplastic anaemia

Answer

Iron deficiency anaemia

Answer

Megaloblastic anaemia

Question 10

What is the chromosomal translocation associated with Acute Myeloid Leukemia M3?

Accepted Answer

t(15;17)

Answer

t(18;21)

Answer

t(9;11)

Answer

t(8;21)

Hematopathology — MCQs

Hematopathology — MCQs

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