Hematology — MCQs

Hematology Indian Medical PG Practice Questions and MCQs

Question 1001: What dietary recommendation should be made for individuals with glucose-6-phosphate dehydrogenase deficiency?

A. Avoid fava beans to prevent hemolytic anemia. (Correct Answer)
B. Increase iron intake to support red blood cell production.
C. Reduce carbohydrate intake to manage energy levels.
D. Increase vitamin C intake to enhance overall health.

Explanation: ***Avoid fava beans to prevent hemolytic anemia. [1]*** - Individuals with **glucose-6-phosphate dehydrogenase (G6PD) deficiency** lack a crucial enzyme that protects red blood cells from oxidative damage. [3], [4] - **Fava beans** contain compounds that trigger oxidative stress, leading to **hemolytic anemia** in G6PD deficient individuals. [1] *Increase iron intake to support red blood cell production.* - While **anemia** can be a complication of G6PD deficiency due to hemolysis, routine iron supplementation is not a primary dietary recommendation and could even be harmful if not indicated by iron deficiency. [2] - The main goal is to prevent hemolysis by avoiding triggers, not solely to manage the secondary effects of anemia. [4] *Reduce carbohydrate intake to manage energy levels.* - Carbohydrate intake is not directly related to the pathophysiology of **G6PD deficiency** or its management. - There is no evidence to suggest that altering carbohydrate intake would prevent **hemolytic crises** or improve overall health outcomes in G6PD deficient individuals. *Increase vitamin C intake to enhance overall health.* - While **vitamin C** is an antioxidant, excessive intake can sometimes act as a pro-oxidant, and it is not specifically recommended or contraindicated for G6PD deficiency. - The focus of dietary recommendations for G6PD deficiency is to avoid specific oxidative stressors, not to broadly increase antioxidant consumption.

Question 1002: A 35-year-old woman presents with fatigue and pallor. A peripheral blood smear shows hypochromic, microcytic red blood cells with anisopoikilocytosis and a low reticulocyte count. What is the next best step in management?

A. Start treatment with iron supplements and monitor response.
B. Perform diagnostic tests to confirm iron deficiency. (Correct Answer)
C. Conduct an invasive procedure to evaluate bone marrow.
D. Provide immediate blood transfusion for anemia.

Explanation: ***Order serum ferritin and total iron-binding capacity (TIBC)*** - This test is essential to confirm **iron deficiency anemia**, indicated by hypochromic, microcytic red blood cells [1]. [1]. - Measurement of **serum ferritin** helps assess iron stores and **TIBC** can indicate the body's iron-binding capacity, guiding proper treatment. *Administer iron supplements and re-evaluate in 3 months* - While this may seem appropriate for **iron deficiency anemia**, it is premature without confirming the diagnosis through testing. - Immediate iron supplementation without evaluating iron status can lead to **excessive iron intake** if not needed [2]. *Transfuse packed red blood cells* - This option is used for **acute severe anemia** or significant symptoms, but not unless the diagnosis is clear [1]. - The current clinical presentation does not warrant immediate transfusion, as underlying causes need to be confirmed. *Perform bone marrow biopsy* - This is generally reserved for cases where there is suspicion of **bone marrow pathology** [3] or when other tests have not yielded results. - The presentation is more consistent with **iron deficiency**, making less invasive tests preferable initially.

Question 1003: A 40-year-old woman presents with fatigue and pallor. A peripheral blood smear shows hypochromic microcytic anemia. She has a history of heavy menstrual bleeding. What is the most likely cause of her anemia?

A. Iron deficiency anemia (Correct Answer)
B. Thalassemia minor
C. Sideroblastic anemia
D. Vitamin B12 deficiency

Explanation: ***Iron deficiency anemia*** - The patient's **heavy menstrual bleeding** likely leads to **iron loss**, causing hypochromic microcytic anemia [1][2]. - The peripheral blood smear findings are characteristic of **iron deficiency**, which is the most common cause of anemia in women of reproductive age [1][2]. *Vitamin B12 deficiency* - Typically presents with **macrocytic anemia** and neurological symptoms, which are absent in this patient. - Blood smear would show **megaloblasts** rather than hypochromic microcytic cells. *Thalassemia minor* - Although it can cause **microcytic anemia**, it usually does not present with significant **fatigue** or **pallor** without a family history. - It is typically associated with an elevated **HbA2** level found in hemoglobin electrophoresis, which is not indicated here. *Sideroblastic anemia* - Characterized by the presence of **ringed sideroblasts** in the bone marrow, not typically seen in a peripheral smear. - It often presents with **microcytic anemia**, but causes are often related to **congenital disorders** or certain **toxins** rather than heavy menstrual bleeding.

Question 1004: A 35-year-old man presents with bone pain and high blood calcium levels. Imaging reveals lytic bone lesions, and a bone marrow biopsy shows plasma cell proliferation. Which serum protein is likely to be elevated?

A. IgG (Correct Answer)
B. IgA
C. C-reactive protein
D. Alpha-1 antitrypsin

Explanation: Detailed explanation of the characteristic findings in multiple myeloma. ***IgG*** - Elevated **serum IgG** levels are characteristic of multiple myeloma, a condition marked by plasma cell proliferation and lytic bone lesions [1]. - High blood calcium levels, or **hypercalcemia**, are often associated with the release of osteoclastic factors by these expanded plasma cells. *IgE* - Primarily involved in **allergic reactions** and **parasitic infections**, not in multiple myeloma. - IgE levels do not correlate with **bone pain** or **lytic lesions**, making this option inappropriate. *Fibrinogen* - Not typically elevated in multiple myeloma; it is more associated with **inflammatory states** or **coagulation disorders**. - This protein does not indicate **plasma cell proliferation** or relate to the symptoms presented in bone pathology. *Albumin* - Generally a **negative acute phase reactant**; levels may actually decrease in systemic illness or malignancy. - Albumin does not contribute to the **diagnostic picture** of multiple myeloma or its typical serum protein elevation.

Question 1005: A patient with severe thrombocytopenia is given a platelet transfusion. What is the primary indication for this treatment?

A. To increase oxygen-carrying capacity
B. To replace coagulation factors
C. To prevent bleeding (Correct Answer)
D. To treat anemia

Explanation: ***To prevent bleeding*** - The primary indication for platelet transfusion is to **prevent bleeding** in patients with severe thrombocytopenia [1]. - Low platelet counts significantly increase the risk of **spontaneous bleeding**, particularly in critical situations [1]. *To increase oxygen-carrying capacity* - This option is irrelevant as platelet transfusions do not influence **hemoglobin levels** or oxygen transport. - Oxygen-carrying capacity is primarily a function of **red blood cells**, not platelets. *To treat anemia* - Anemia is treated with **red blood cell transfusions**, not platelet transfusions. - Platelets are crucial for **clotting**, not for carrying oxygen to tissues. *To replace coagulation factors* - Coagulation factors are replaced with **fresh frozen plasma or factor concentrates**, not platelets. - Platelets play a role in **hemostasis**, but do not serve to replace factors that aid in blood clotting.

Question 1006: A patient with fatigue and pallor has a low hemoglobin level and a high total iron-binding capacity (TIBC). Which condition is most likely?

A. Iron Deficiency Anemia (Correct Answer)
B. Anemia of Chronic Disease
C. Sideroblastic Anemia
D. Hemolytic Anemia

Explanation: ***Iron Deficiency Anemia*** - Characterized by **low hemoglobin** levels and **high total iron-binding capacity (TIBC)**, indicating low iron stores [1]. - Commonly presents with **fatigue** and **pallor**, consistent with this patient's symptoms [1]. *Sideroblastic Anemia* - Often presents with **normal or low TIBC**, as iron may be trapped in the mitochondria. - Symptoms may include **microcytic anemia**, but TIBC levels and presentation differ significantly from iron deficiency anemia. *Hemolytic Anemia* - Characterized by **increased reticulocyte count** and **normal to low TIBC**, as hemolysis leads to iron release [1]. - Symptoms typically include **jaundice** and **dark urine**, which are not mentioned here. *Anemia of Chronic Disease* - Typically presents with **low TIBC** and **normal or increased ferritin** due to sequestration of iron in chronic inflammation [1]. - Symptoms may overlap with other forms of anemia but would show different laboratory findings than in this case [1].

Question 1007: A 35-year-old woman presents with fatigue, weakness, and pallor. Laboratory tests reveal microcytic hypochromic anemia, low serum ferritin, and increased total iron-binding capacity. What is the most likely cause of her condition?

A. Vitamin B12 deficiency
B. Chronic blood loss (Correct Answer)
C. Hemolytic anemia
D. Thalassemia

Explanation: ***Chronic blood loss*** - Chronic blood loss is the most common cause of **iron deficiency anemia** in premenopausal women, leading to the **microcytic, hypochromic** red blood cells, low **ferritin**, and high **total iron-binding capacity (TIBC)** seen in this patient [1]. Menorrhagia is a particularly common cause in pre-menopausal females, necessitating a thorough history of menstrual cycles [2]. - The patient's fatigue, weakness, and pallor are classic symptoms of anemia, and the iron studies are highly indicative of iron depletion due to ongoing blood loss [1]. [2]. *Vitamin B12 deficiency* - Vitamin B12 deficiency typically causes **macrocytic (megaloblastic) anemia**, characterized by large red blood cells, which contradicts the **microcytic** finding in this case [2]. - It would not lead to low serum **ferritin** or increased **TIBC**; these are specific indicators of iron deficiency. *Hemolytic anemia* - Hemolytic anemia involves the premature destruction of red blood cells, often leading to **normocytic or macrocytic anemia**, elevated **reticulocyte count**, and signs like **jaundice** or **splenomegaly**, none of which are mentioned [2]. - It would not present with low **ferritin** and high **TIBC**, as these values point directly to iron deficiency. *Thalassemia* - Thalassemia is a genetic disorder causing **microcytic, hypochromic anemia**, but it is characterized by **normal or elevated iron stores** (including ferritin) and normal **TIBC**, as the problem is with globin chain synthesis, not iron availability. - The differential diagnosis often includes iron deficiency anemia, but the distinguishing iron studies (normal/high ferritin, normal TIBC) rule it out in this scenario.

Question 1008: Which of the following is the MOST COMMON condition that can lead to an abnormal Schilling test?

A. None of the options
B. Intrinsic factor deficiency (Correct Answer)
C. Ileal disease
D. Chronic pancreatitis

Explanation: Intrinsic factor deficiency - Pernicious anemia, caused by intrinsic factor deficiency, is the most common reason for an abnormal Schilling test due to impaired vitamin B12 absorption [1]. - In this condition, the stomach's parietal cells fail to produce intrinsic factor, which is essential for B12 absorption in the ileum [2]. Ileal disease - While ileal diseases (e.g., Crohn's disease, resection) can cause an abnormal Schilling test due to malabsorption of the B12-intrinsic factor complex, they are less common causes overall compared to pernicious anemia [2]. - The Schilling test would typically show low urinary excretion in both phases, but this is a secondary cause rather than the most frequent primary cause. Chronic pancreatitis - Chronic pancreatitis can lead to vitamin B12 malabsorption, but it's typically due to a failure to release B12 from its binding proteins in the stomach and duodenum, not a direct problem with intrinsic factor or ileal absorption. - This condition is a less common cause of an abnormal Schilling test, and the test's second phase (with intrinsic factor) usually corrects the malabsorption. None of the options - This option is incorrect because intrinsic factor deficiency is indeed a major and the most common cause of an abnormal Schilling test.

Question 1009: Which of these is increased in iron deficiency anemia?

A. Serum ferritin
B. Serum transferrin saturation
C. Serum iron
D. Total iron-binding capacity (Correct Answer)

Explanation: ***Total iron-binding capacity*** - In **iron deficiency anemia**, the body tries to compensate by increasing the production of **transferrin**, the protein responsible for binding iron. [1] - This increase in unbound transferrin leads to a higher **total iron-binding capacity (TIBC)**, reflecting the increased potential for iron binding. [1] *Serum ferritin* - **Ferritin** is an iron storage protein, and its levels are typically **decreased** in iron deficiency anemia as the body mobilizes its iron reserves. [1] - Low serum ferritin is a highly sensitive and specific indicator of **iron depletion**. [1] *Serum transferrin saturation* - **Transferrin saturation** represents the percentage of transferrin binding sites occupied by iron. - In iron deficiency anemia, both **serum iron** and the iron bound to transferrin are low, leading to a **decreased** transferrin saturation. [1] *Serum iron* - **Serum iron** measures the amount of iron circulating in the blood, primarily bound to transferrin. - In iron deficiency anemia, the availability of iron is reduced, resulting in **decreased** serum iron levels. [1]

Question 1010: A 30-year-old female with a history of fatigue and jaundice presents with pallor. A peripheral blood smear reveals spherocytes and polychromasia. Which additional laboratory test would be most appropriate to evaluate the underlying cause of these findings?

A. Direct Coombs test (Correct Answer)
B. Serum ferritin level
C. Bone marrow biopsy
D. Hemoglobin electrophoresis

Explanation: ***Direct Coombs test*** - A positive **Direct Coombs test** helps diagnose **autoimmune hemolytic anemia**, which aligns with the findings of **spherocytes** [1] and **polychromasia** in the peripheral smear. - This test distinguishes between **immune-mediated** and **non-immune hemolytic anemias** [1], making it crucial for further evaluation. *Serum ferritin level* - Measures iron stores and does not directly assess the cause of **hemolytic anemia** seen in this patient. - It's more relevant in cases of **iron deficiency anemia**, which is unlikely given the symptoms and smear findings. *Bone marrow biopsy* - Usually indicated for evaluating **aplastic anemia** or **malignancies**, not typically for hemolytic processes [2]. - The peripheral smear findings suggest a hemolytic process rather than a primary bone marrow disorder, reducing the necessity of this test [2]. *Hemoglobin electrophoresis* - Primarily used to identify **hemoglobinopathies** like **sickle cell disease** or **thalassemia**, which are not suggested by the current clinical picture. - The presence of **spherocytes** [1] and **polychromasia** indicates hemolysis rather than a problem related to hemoglobin structure.

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Anemia Evaluation and Management

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Hemoglobinopathies

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Thalassemias

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Platelet Disorders

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Coagulation Disorders

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Thrombotic Disorders

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Leukemias

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Lymphomas

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Multiple Myeloma and Plasma Cell Disorders

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Myeloproliferative Neoplasms

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Transfusion Medicine

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Hematopoietic Stem Cell Transplantation

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Hematology — MCQs

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