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: 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 1354: Flow cytometry is primarily used for analysis of which of the following cell types?

A. Lymphocytes (Correct Answer)
B. Platelets
C. Erythrocytes
D. Basophils

Explanation: ***Lymphocytes*** - Flow cytometry is excellently suited for **lymphocyte analysis** due to their distinct surface markers (CD antigens) that can be labeled with fluorescent antibodies. - It allows for the **identification and quantification of various lymphocyte subsets** (e.g., T cells, B cells, NK cells), crucial in diagnosing immunodeficiencies, autoimmune diseases, and hematologic malignancies. *Erythrocytes* - While flow cytometry can detect erythrocytes, their primary role is oxygen transport, and they **lack cell surface markers** commonly analyzed by flow cytometry for classification. - **Complete blood count (CBC)** is the standard method for erythrocyte quantification and morphological analysis. *Platelets* - Flow cytometry can be used to study platelet activation and surface markers, but it's not their **primary or routine analytical tool** for mere count or general assessment. - **Automated hematology analyzers** are routinely used for platelet counts and basic morphology. *Basophil* - Basophils are a type of granulocyte and can be identified by flow cytometry, but they are a **very small percentage of circulating leukocytes**, making them less commonly the *primary* target of a typical flow cytometry panel focused on overall leukocyte populations. - While they can be analyzed, lymphocytes offer a much **broader range of clinical utility** due to their diverse subpopulations and roles in immunity and disease.

Question 1355: Where are Dutcher bodies typically seen?

A. Brain
B. Spleen
C. Bone marrow (Correct Answer)
D. Liver

Explanation: ***Bone marrow*** - **Dutcher bodies** are **intranuclear inclusions** of immunoglobulin, characteristically seen in **plasma cells** within the bone marrow. - Their presence is a classic morphological feature of **Waldenström macroglobulinemia** and other lymphoproliferative disorders. *Brain* - The brain is not the typical site for finding Dutcher bodies; structures like **Lewy bodies** (Parkinson's disease) or **neurofibrillary tangles** (Alzheimer's disease) are seen here. - Dutcher bodies are specifically associated with plasma cell abnormalities and **B-cell lymphomas**. *Spleen* - While the spleen can be involved in various hematological malignancies, Dutcher bodies are not primarily identified within splenic tissue but rather in the **plasma cells** of the **bone marrow**. - Splenic pathology typically involves changes in spleen size and cellular architecture, not intranuclear inclusions like Dutcher bodies. *Liver* - The liver is not the primary site for the detection of Dutcher bodies. Liver pathology might show infiltration by malignant cells in some systemic diseases, but not these specific inclusions within hepatocytes or other liver cells. - **Councilman bodies** (apoptotic hepatocytes in viral hepatitis) are an example of liver-specific microscopic findings.

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: 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 1358: What is the neutrophil count for moderate neutropenia?

A. <500/mm3
B. 500 - 1000/mm3 (Correct Answer)
C. >1000/mm3
D. 100/mm3

Explanation: ***500 - 1000/mm3*** - **Moderate neutropenia** is defined as an absolute neutrophil count (ANC) between **500 and 1000 cells/mm³**. - Patients in this range have an increased risk of infection, although generally less severe than those with very low counts. *<500/mm3* - An absolute neutrophil count of **less than 500 cells/mm³** indicates **severe neutropenia**, which is associated with a significantly higher risk of life-threatening infections. - Patients with counts below 500 cells/mm³ are often considered to be at risk for **febrile neutropenia**. *>1000/mm3* - An absolute neutrophil count of **greater than 1000 cells/mm³** is generally considered within the **mild neutropenia** or even **normal** range, depending on the exact cutoff used in specific contexts (normal range typically 1500-8000 cells/mm³). - This level of neutropenia is usually not clinically significant in terms of increased infection risk. *100/mm3* - An absolute neutrophil count of **100 cells/mm³** falls into the category of **severe neutropenia** (also known as agranulocytosis), which is a critical level. - This count indicates an extremely high risk of serious bacterial and fungal infections.

Question 1359: 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 1360: 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.

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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