Hematopathology — MCQs

Hematopathology Indian Medical PG Practice Questions and MCQs

Question 1351: Richter's syndrome refers to which of the following malignant transformations?

A. CLL evolving into aggressive lymphoma (Correct Answer)
B. Hairy cell leukemia evolving to AML
C. Blast crisis in CML
D. Splenic infiltration in NHL

Explanation: ***CLL evolving into aggressive lymphoma*** - **Richter's transformation** specifically describes the malignant transformation of Chronic Lymphocytic Leukemia (CLL) into a more aggressive form of B-cell non-Hodgkin lymphoma, most commonly **diffuse large B-cell lymphoma (DLBCL)**. - This transformation is characterized by a rapid clinical decline, palpable lymphadenopathy, and splenomegaly, with a distinct change in morphology and immunophenotype of the malignant cells. *Hairy cell leukemia evolving to AML* - Hairy cell leukemia (HCL) is a chronic lymphoproliferative disorder that rarely transforms into secondary malignancies; however, transformation into **acute myeloid leukemia (AML)** is not a hallmark of HCL and is not referred to as Richter's syndrome. - HCL is characterized by pancytopenia and distinctive hairy-looking lymphocytes, distinct from the progression pattern seen in Richter's. *Blast crisis in CML* - **Blast crisis** is the terminal phase of chronic myeloid leukemia (CML), where the number of myeloid blasts in the blood or bone marrow increases to >20%. - This is a progression of CML, a myeloproliferative neoplasm, and is distinct from the lymphoid transformation described by Richter's syndrome. *Splenic infiltration in NHL* - While non-Hodgkin lymphoma (NHL) can involve the spleen, **splenic infiltration** itself does not describe a malignant transformation syndrome like Richter's. - Richter's syndrome describes a transformation *from* CLL *to* a more aggressive lymphoma, not just a site of involvement for NHL.

Question 1352: Which condition is most commonly associated with basophilic leukocytosis?

A. Acute Myeloid Leukemia (AML)
B. Acute Lymphoblastic Leukemia (ALL)
C. Chronic Myeloid Leukemia (CML) (Correct Answer)
D. Chronic Lymphocytic Leukemia (CLL)

Explanation: ***Chronic Myeloid Leukemia (CML)*** - **Basophilic leukocytosis** is a characteristic feature of **CML**, resulting from the clonal expansion of myeloid stem cells. - The presence of **immature granulocytes**, including basophils, is key to diagnosing CML, particularly in the chronic phase. *Acute Myeloid Leukemia (AML)* - AML is characterized by an excessive proliferation of **myeloblasts** (immature myeloid cells) in the bone marrow and peripheral blood, not mature basophils. - While other myeloid lineages can be affected, basophilic leukocytosis is not a defining or common feature. *Acute Lymphoblastic Leukemia (ALL)* - ALL involves the uncontrolled proliferation of **lymphoblasts** (immature lymphoid cells). - This condition is specifically associated with the lymphoid lineage and does not typically cause an increase in myeloid cells like basophils. *Chronic Lymphocytic Leukemia (CLL)* - CLL is characterized by the accumulation of **mature, but dysfunctional, B lymphocytes**. - It involves the lymphoid lineage and does not lead to basophilic leukocytosis, which is a feature of myeloid disorders.

Question 1353: Left shift in Arneth's count is seen in?

A. Septicemia (Correct Answer)
B. Megaloblastic anemia
C. Liver disease
D. TB

Explanation: ***Septicemia*** - A **left shift** indicates a higher proportion of **immature neutrophils (bands or metamyelocytes)** in the blood, which is a hallmark of the body rapidly producing white blood cells to fight severe bacterial infections like **septicemia**. - This response is due to overwhelming bacterial load and systemic inflammation, prompting the bone marrow to release less mature neutrophils into circulation. *Megaloblastic anemia* - Characterized by **hypersegmented neutrophils** (a right shift), not a left shift, due to impaired DNA synthesis and delayed nuclear maturation. - The primary defect is in red blood cell production, although white blood cell morphology can also be affected. *Liver disease* - Liver disease does not typically cause a left shift in the Arneth count; instead, it can lead to various hematological abnormalities, including **anemia**, **thrombocytopenia**, or altered coagulation factors. - Neutrophil counts might fluctuate, but a sustained left shift is not a characteristic feature. *TB* - Tuberculosis usually causes a mild to moderate **neutrophilic leukocytosis** and sometimes a **monocytosis**, but a significant **left shift** is not a characteristic feature unless there is a severe acute exacerbation or secondary bacterial infection. - Chronic infections like TB are more often associated with changes like monocytosis or lymphocytosis.

Question 1354: Which factor is primarily found in cryoprecipitate?

A. Factor II
B. Factor V
C. Factor VIII (Correct Answer)
D. Factor IX

Explanation: ***Factor VIII*** - Cryoprecipitate is enriched with **Factor VIII**, essential for blood coagulation and hemophilia treatment [1]. - It also contains **fibrinogen**, **Factor XIII**, and von Willebrand factor, crucial for stable clot formation [1]. *Factor II* - Factor II, also known as **prothrombin**, is mainly found in **plasma**, not concentrated in cryoprecipitate. - It is not specifically extracted through cryoprecipitation, which focuses on fibrinogen and other factors. *Factor V* - Factor V is generally present in **plasma**, but not in significant amounts in cryoprecipitate. - It plays a role in the coagulation cascade but is not a primary component of cryoprecipitate. *Factor IX* - Factor IX is mainly associated with the **intrinsic pathway** of coagulation and is part of plasma, not concentrated in cryoprecipitate. - While it is vital for hemophilia B, it does not form part of the cryoprecipitate's key components. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, pp. 669-670.

Question 1355: Which of the following is considered a hypercoagulable factor?

A. Protein C
B. Protein S
C. Factor V Leiden (Correct Answer)
D. Antithrombin III

Explanation: ***Factor V Leiden*** - Factor V Leiden is a **mutation** of the Factor V gene, leading to a hypercoagulable state due to **increased resistance** to activated protein C [1]. - This condition substantially raises the risk of **venous thromboembolism**, making it a critical factor in thrombotic events [1]. *Protein S* - Protein S functions as a **cofactor** for activated protein C, promoting inactivation of coagulation factors and thus **decreasing** clot formation. - Deficiency in Protein S can lead to thrombosis, but it is not inherently a **hypercoagulable factor**. *Protein C* - Protein C is activated by the thrombin-thrombomodulin complex, which helps to **regulate coagulation** and **prevent clotting**. - It is protective against thrombosis, and its deficiency can predispose to clot formation, but it does not act as a hypercoagulable factor itself. *Antithrombin III* - Antithrombin III is a **natural anticoagulant** that inhibits thrombin and other proteases of the coagulation cascade, thus preventing excessive clotting. - Its deficiency also leads to hypercoagulability, but it is not classified as a hypercoagulable factor. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Hemodynamic Disorders, Thromboembolic Disease, and Shock, pp. 133-134.

Question 1356: In which condition is the 'Swiss cheese pattern' typically observed in pathology?

A. Endometrial hyperplasia (Correct Answer)
B. Disseminated intravascular coagulation (DIC)
C. Acute myocardial infarction
D. Chronic gastritis

Explanation: ***Metropathica hemorrhagica*** - Characterized by a **Swiss cheese pattern** due to multiple cystic changes in the endometrium [1], often associated with chronic endometrial irritation. - The pattern arises from **irregular endometrial proliferation** and is indicative of disturbances in menstrual function. *Mucinous cystadenoma* - Typically presents as a **smooth, multilocular cyst** with mucin production, but does not exhibit a Swiss cheese morphology. - Often associated with **abdominal masses** rather than the specific endometrial patterns seen in metropathica hemorrhagica. *Dermoid* - Consists of **teratoma-like tissues** and may show cystic areas, but lacks the Swiss cheese appearance associated with endometrial pathology. - Commonly found in **ovarian masses**, characterized by a variety of tissue types instead of the specific cystic changes related to metropathica hemorrhagica. *Serous cystadenoma* - Features a **serous fluid-filled cyst**, often uniform in appearance, without the Swiss cheese pattern. - Primarily occurs in the ovaries and is noted for its **smooth surface** rather than the cystic irregularities typical of metropathica hemorrhagica. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Female Genital Tract Disease, pp. 473-475.

Question 1357: Which of the following is a quantitative defect in globin synthesis?

A. Thalassemia (Correct Answer)
B. Sickle cell hemoglobinopathy
C. G6PD deficiency
D. Diamond-Blackfan syndrome

Explanation: ***Thalassemia*** - **Thalassemia** is characterized by a **quantitative defect** in globin chain synthesis, leading to reduced hemoglobin production [1][2][5]. - It results in **microcytic anemia** due to ineffective erythropoiesis and imbalanced globin chain production [2]. *Diamond-Blackfan syndrome* - This condition is a type of **macrocytic anemia** due to failure of red blood cell production, rather than a globin synthesis defect. - It generally presents with **normocytic or macrocytic** anemia and is associated with **erythroblastopenia**. *Sickle cell hemoglobinopathy* - Sickle cell disease involves a **qualitative defect** in hemoglobin (Hb S) rather than a quantitative one [3][4][5]. - Symptoms include pain episodes, **vaso-occlusive crises**, and organ damage due to sickling of red blood cells [3][4]. *G6PD deficiency* - G6PD deficiency is an **enzyme deficiency** leading to hemolytic anemia under oxidative stress, not a defect in globin synthesis [4][5]. - Characterized by **episodic hemolytic anemia**, it primarily affects red blood cell stability rather than hemoglobin production [4]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 587-588. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, pp. 646-647. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 598-599. [4] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, pp. 652-654. [5] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, p. 638.

Question 1358: What is the maximum recommended storage period for platelets in blood banks under standard storage conditions?

A. 5 days (Correct Answer)
B. 7 days
C. 3 days
D. 10 days

Explanation: ***5 days*** - The maximum recommended storage period for **platelets** in blood banks under standard conditions is **5 days** as per Indian guidelines (NACO, DGHS). - Platelets are stored at **20-24°C with continuous agitation** to maintain viability and function. - This duration balances optimal platelet function while minimizing the risk of **bacterial contamination**, which increases significantly with longer storage. *3 days* - This is an outdated storage limit that was used in earlier protocols. - While still safe, limiting storage to 3 days would significantly reduce the **availability of platelets** for transfusion and increase wastage. *7 days* - The **US FDA** has approved 7-day storage for platelets with advanced **bacterial detection systems** (since 2020). - However, this is **not the standard in India**; Indian blood banks follow the 5-day protocol unless equipped with approved bacterial testing technology. - Extended storage beyond 5 days requires special regulatory approval and validated bacterial detection methods. *10 days* - Storing platelets for 10 days significantly increases the risk of **bacterial contamination** and marked decline in **platelet viability** and hemostatic function. - There are **no current standard recommendations** that permit routine platelet storage for 10 days in any major blood banking guideline.

Question 1359: Which of the following is a feature not typically associated with Hereditary Spherocytosis?

A. Gall stones
B. Direct Coombs Positive (Correct Answer)
C. Splenomegaly
D. Increased Osmotic Fragility

Explanation: ***Direct Coomb's Positive*** - In Hereditary Spherocytosis, the **Coomb's test** is typically **negative**, indicating that hemolysis is not due to autoimmune factors. - Presence of **spherocytes** on the blood smear and increased fragility are hallmark findings, not antibodies against red cells [1]. *Splenomegaly* - **Splenomegaly** is common in Hereditary Spherocytosis as the spleen actively removes abnormal spherocytes from circulation [1]. - It can lead to **hypersplenism**, with resultant anemia and thrombocytopenia. *Increased Osmotic Fragility* - Increased osmotic fragility is a key feature of Hereditary Spherocytosis, as red blood cells are less able to withstand hypotonic solutions [1]. - This results from a defect in the red cell membrane, causing spherocyte shape and fragility. *Gall stones* - Patients may develop **gallstones** due to increased bilirubin from the breakdown of spherocytes, leading to **bilirubin stones** [1]. - Gallstones are a common complication due to chronic hemolysis. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 597-598.

Question 1360: What is the most important diagnostic feature for beta thalassemia trait?

A. Increased HbF
B. Decreased MCH
C. Decreased MCV
D. Increased HbA2 (Correct Answer)

Explanation: ***Raised HbA2*** - In beta thalassemia trait, the most significant diagnostic feature is an **increased level of HbA2** (>3.5%), which helps differentiate it from other types of anemias [1]. - This is due to a compensatory mechanism as the body attempts to produce more **alpha globin chains** in response to decreased beta globin production. *Reduced MCV* - While **reduced mean corpuscular volume (MCV)** can indicate microcytic anemia, it is not specific enough for beta thalassemia trait as it can appear in other conditions. - MCV can vary in individuals, making it less reliable as a **diagnostic feature** compared to HbA2 levels. *Raised HbF* - An increase in **hemoglobin F (HbF)** is more characteristic of beta thalassemia major rather than the trait; levels in the trait do not typically rise significantly. - This feature can also be elevated in other conditions, thus not serving as a definitive marker for the trait. *Reduced MCH* - A **decreased mean corpuscular hemoglobin (MCH)** is indicative of microcytic anemia but lacks specificity for beta thalassemia trait alone. - Similar to MCV, it can occur in various types of anemia and does not pinpoint the diagnosis effectively. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, pp. 649-650.

Practice by Chapter

Anemias: Classification and Approach

Practice Questions

Hemolytic Anemias

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Myeloproliferative Neoplasms

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Myelodysplastic Syndromes

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Acute Leukemias

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Chronic Leukemias

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Lymphomas and Lymphoid Neoplasms

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Plasma Cell Disorders

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Bleeding Disorders

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Thrombotic Disorders

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