Hematology Practice Questions

Q: Hypersplenism is associated with which of the following hematological findings?

Pancytopenia. ### Explanation **Concept Overview:** Hypersplenism is a clinical syndrome characterized by an overactive spleen that excessively sequesters and destroys circulating blood cells. It is defined by the classic **Dameshek’s Criteria**, which includes: 1. Splenomegaly [2]. 2. Reduction in one or more cell lines (anemia, leukopenia, and/or thrombocytopenia). 3. Normal or hypercellular bone marrow (compensatory response). 4. Correction of cytopenias following splenectomy. **Why Pancytopenia is Correct:** While hypersplenism can manifest as an isolated reduction in one cell line (most commonly thrombocytopenia), the hallmark of the syndrome is **Pancytopenia**. The enlarged spleen acts as a massive reservoir; normally, it holds 30% of the body's platelets, but in hypersplenism, it can sequester up to 90% [1]. Simultaneously, increased splenic macrophages lead to the premature destruction of erythrocytes and leukocytes. Therefore, a reduction in all three cell lines is the most characteristic finding. **Analysis of Incorrect Options:** * **B & C (Thrombocytopenia/Leukopenia):** These are components of hypersplenism, but they are incomplete. "Pancytopenia" is the more comprehensive and superior answer as it encompasses the reduction of all hematopoietic lineages. * **D (Polycythemia):** This is the opposite of hypersplenism. Polycythemia involves an increase in red cell mass, whereas hypersplenism leads to anemia. **NEET-PG High-Yield Pearls:** * **Most common cause:** Portal hypertension (due to Cirrhosis) is the leading cause of congestive splenomegaly and hypersplenism. * **Peripheral Smear:** Unlike hyposplenism (where you see Howell-Jolly bodies), hypersplenism typically shows a "clean" smear but with cytopenias. * **Treatment:** Splenectomy is only indicated if the cytopenia is symptomatic (e.g., severe bleeding or recurrent infections) or if the primary disease requires it.

Q: A 71-year-old man presents for evaluation of a recently discovered elevated erythrocyte sedimentation rate (ESR) from a routine blood test. His medical history includes well-controlled hypertension, managed with metoprolol. A physical examination reveals no abnormalities. Laboratory findings include hemoglobin 12.6 gm/dL, leukocyte count 8500/mL, platelet count 265,000/mL, total protein 6.2 g/dL, albumin 3.4 g/dL, BUN 16 mg/dL, creatinine 0.75 mg/dL, and calcium 9.2 mg/dL. Serum protein electrophoresis shows a sharp, narrow spike, and serum immunofixation identifies M-protein at 1.2 gm/dL. Bone marrow examination reveals fewer than 10% monoclonal plasma cells, and a skeletal survey is negative for lytic lesions. What is the most likely diagnosis?

Monoclonal gammopathy of undetermined significance. This case describes a classic presentation of **Monoclonal Gammopathy of Undetermined Significance (MGUS)**, a common premalignant condition in the elderly. ### 1. Why MGUS is the Correct Diagnosis The diagnosis of MGUS is based on three specific criteria, all of which are met by this patient: * **M-protein level:** < 3 g/dL (Patient has 1.2 g/dL). * **Bone marrow plasma cells:** < 10% (Patient has < 10%). * **Absence of end-organ damage (CRAB features):** No **C**alcium elevation, **R**enal insufficiency, **A**nemia (significant), or **B**one lesions. The patient’s ESR is elevated due to the presence of the M-protein (paraproteinemia), which causes "rouleaux formation" of RBCs [1]. [1] ### 2. Why Other Options are Incorrect * **Multiple Myeloma (MM):** Requires M-protein ≥ 3 g/dL OR marrow plasma cells ≥ 10%, **PLUS** evidence of CRAB features [1]. This patient lacks end-organ damage. * **Smoldering Multiple Myeloma (SMM):** Requires M-protein ≥ 3 g/dL OR marrow plasma cells 10–60%, but **without** CRAB features. This patient’s M-protein and plasma cell counts are below these thresholds. * **Waldenstrom Macroglobulinemia:** This is a B-cell lymphoma characterized by **IgM** monoclonal protein [1] and lymphoplasmacytic infiltration of the bone marrow, typically presenting with hyperviscosity and hepatosplenomegaly, which are absent here. ### 3. NEET-PG High-Yield Pearls * **Risk of Progression:** MGUS progresses to Multiple Myeloma at a rate of approximately **1% per year**. * **Management:** MGUS requires "watchful waiting" (observation) rather than chemotherapy. * **Most common M-protein in MGUS:** IgG (followed by IgA). * **Skeletal Survey:** Always use plain X-rays or low-dose CT; **Technetium-99m bone scans are often negative** in myeloma because they detect osteoblastic activity, whereas myeloma is purely osteolytic.

Q: What is the formula for parenteral iron therapy?

4.4 x body weight (kg) x Hb deficit (g/dL). The correct formula for calculating the total dose of parenteral iron required to restore hemoglobin levels and replenish iron stores is known as the **Ganzoni Formula**. ### 1. Why Option A is Correct The standard Ganzoni formula is: **Total Iron Deficit (mg) = Body weight (kg) × (Target Hb - Actual Hb) (g/dL) × 2.4 + Iron stores (mg)** In many simplified clinical calculations and exam-based questions, the factor **4.4** is used as a shorthand. This is derived from: * **2.4:** A constant representing the blood volume (approx. 7% of body weight) and the iron content of hemoglobin (0.34%). * **Iron Stores:** Usually estimated at 500 mg for adults. * When the iron store requirement is integrated into the multiplier for a standard adult weight, the coefficient effectively becomes **4.4**. This ensures both the hemoglobin deficit is corrected and the depleted stores are replenished. ### 2. Why Other Options are Incorrect * **Options B, C, and D:** These multipliers (3.3, 2.2, 1.1) are mathematically insufficient. Using these lower constants would result in under-replacement, correcting only the circulating hemoglobin without addressing the essential 500–1000 mg of storage iron (ferritin) required to prevent immediate recurrence of anemia. ### 3. NEET-PG High-Yield Pearls * **Target Hb:** Usually taken as 15 g/dL. * **Iron Stores:** If the body weight is >35 kg, stores are calculated as 500 mg. If <35 kg, stores are calculated as 15 mg/kg. * **Indication:** Parenteral iron is indicated in cases of oral iron intolerance, malabsorption (e.g., Celiac disease), or when rapid replenishment is needed (e.g., 3rd-trimester pregnancy or CKD). * **Adverse Effect:** While rare with newer formulations like Iron Sucrose or Ferric Carboxymaltose, always monitor for **anaphylaxis**.

Q: What is the best test for assessing iron status?

Ferritin. Explanation: **Serum Ferritin** is considered the most reliable and specific initial test for assessing total body iron stores. Ferritin is an intracellular protein that stores iron and releases it in a controlled manner; its serum levels are directly proportional to the total iron reserves in the reticuloendothelial system (liver, spleen, and bone marrow) [1]. In Iron Deficiency Anemia (IDA), a low serum ferritin level (<15–30 ng/mL) is the **earliest laboratory indicator** of depleted iron stores, often occurring before changes in hemoglobin or red cell indices [1]. **Analysis of Incorrect Options:** * **A. Transferrin:** This is a transport protein. While Total Iron Binding Capacity (TIBC) increases in IDA, it is an indirect measure and can be influenced by liver function and nutritional status. * **C. Serum Iron:** This measures iron bound to transferrin. It is subject to significant daily fluctuations (diurnal variation) and can be affected by recent dietary intake, making it an unreliable marker of overall status when used alone. * **D. Hemoglobin:** This is a marker of anemia, not iron status. Hemoglobin levels only drop during the final stage of iron deficiency (Iron Deficiency Anemia) after storage and transport iron are already exhausted. **Clinical Pearls for NEET-PG:** * **The "Gold Standard":** While Ferritin is the best *non-invasive* test, the **Prussian Blue stain of bone marrow aspirate** remains the definitive gold standard for assessing iron stores [1]. * **The Diagnostic Dilemma:** Ferritin is an **acute-phase reactant**. In the presence of inflammation, infection, or malignancy, ferritin levels may be falsely normal or elevated despite underlying iron deficiency. In such cases, a ferritin level <100 ng/mL may still suggest deficiency. * **Soluble Transferrin Receptor (sTfR):** This is a high-yield marker used to differentiate IDA (where sTfR is elevated) from Anemia of Chronic Disease (where sTfR is normal) [2].

Q: What is the most common manifestation of moderate/severe Hemophilia A?

Recurrent hemarthrosis. **Explanation:** Hemophilia A is an X-linked recessive disorder caused by a deficiency of **Clotting Factor VIII**. In moderate to severe cases (factor levels <5%), the hallmark of the disease is spontaneous or post-traumatic bleeding into deep tissues [1]. **1. Why Recurrent Hemarthrosis is Correct:** The most common and characteristic clinical manifestation of severe Hemophilia A is **hemarthrosis** (bleeding into joint spaces), accounting for nearly 75–80% of all bleeding episodes. The knees are the most frequently affected joints, followed by the elbows and ankles [1]. Repeated episodes lead to "Target Joints," eventually causing chronic synovial hypertrophy and **hemophilic arthropathy**, which is a major cause of morbidity [1]. **2. Why Other Options are Incorrect:** * **B. Recurrent muscle bleeding:** While hematomas in muscles (like the iliopsoas) are common in hemophilia, they occur less frequently than joint bleeds [1]. * **C. Recurrent bleeding from gums:** Mucosal bleeding (epistaxis, gum bleeding, menorrhagia) is more characteristic of **Platelet disorders** or **von Willebrand Disease**, rather than coagulation factor deficiencies. * **D. Recurrent hematuria:** Though spontaneous hematuria can occur in severe hemophiliacs, it is not the primary or most common presenting manifestation. **NEET-PG High-Yield Pearls:** * **Most common joint involved:** Knee joint [1]. * **Screening Test:** Prolonged aPTT; Normal PT and Bleeding Time. * **Confirmatory Test:** Specific Factor VIII assay. * **Treatment of Choice:** Recombinant Factor VIII concentrate [1]. * **Desmopressin (DDAVP):** Useful only in **Mild** Hemophilia A (releases stored Factor VIII from endothelial cells) [2].

Q: Pancytopenia with splenomegaly is seen in all of the following conditions EXCEPT:

Aplastic anemia. **Explanation:** The core clinical concept here is the relationship between bone marrow function and the spleen. **Pancytopenia** refers to a decrease in all three peripheral blood cell lines (RBCs, WBCs, and platelets). **1. Why Aplastic Anemia is the correct answer:** Aplastic anemia is characterized by primary bone marrow failure leading to a "dry tap" or hypocellular marrow. Crucially, **splenomegaly is characteristically absent** in aplastic anemia. If a patient with pancytopenia has a palpable spleen, the clinician must look for alternative diagnoses like leukemia or hypersplenism. **2. Analysis of Incorrect Options:** * **Myelofibrosis:** This condition involves marrow fibrosis leading to extramedullary hematopoiesis. The spleen takes over blood cell production, becoming massive (**massive splenomegaly**). While it starts with high counts, the "spent phase" results in pancytopenia. * **Hairy Cell Leukemia:** This is a classic "NEET-PG favorite." It presents with the triad of **pancytopenia, massive splenomegaly, and a dry tap** on marrow aspiration. * **Polycythemia Vera (Spent Phase):** While PV initially presents with erythrocytosis, it can progress to a "spent phase" (post-polycythemic myelofibrosis), where the marrow fails and the spleen enlarges significantly, leading to pancytopenia. **Clinical Pearls for NEET-PG:** * **Rule of Thumb:** Pancytopenia + Splenomegaly = Think of "Infiltration" or "Sequestration" (e.g., Leukemia, Gaucher disease, Kala-azar, Cirrhosis). * **Rule of Thumb:** Pancytopenia + NO Splenomegaly = Think of "Production Failure" (e.g., Aplastic anemia, PNH, Vitamin B12 deficiency). * **Hairy Cell Leukemia** is uniquely associated with **TRAP** (Tartrate-Resistant Acid Phosphatase) positivity and "hairy" projections on peripheral smear.

Question 1

Hypersplenism is associated with which of the following hematological findings?

Accepted Answer

Pancytopenia

Answer

Thrombocytopenia

Answer

Leukopenia

Answer

Polycythemia

Question 2

A 71-year-old man presents for evaluation of a recently discovered elevated erythrocyte sedimentation rate (ESR) from a routine blood test. His medical history includes well-controlled hypertension, managed with metoprolol. A physical examination reveals no abnormalities. Laboratory findings include hemoglobin 12.6 gm/dL, leukocyte count 8500/mL, platelet count 265,000/mL, total protein 6.2 g/dL, albumin 3.4 g/dL, BUN 16 mg/dL, creatinine 0.75 mg/dL, and calcium 9.2 mg/dL. Serum protein electrophoresis shows a sharp, narrow spike, and serum immunofixation identifies M-protein at 1.2 gm/dL. Bone marrow examination reveals fewer than 10% monoclonal plasma cells, and a skeletal survey is negative for lytic lesions. What is the most likely diagnosis?

Accepted Answer

Monoclonal gammopathy of undetermined significance

Answer

Multiple myeloma

Answer

Smoldering multiple myeloma

Answer

Waldenstrom macroglobulinemia

Question 3

According to the Ann Arbor staging of Hodgkin's lymphoma, which of the following defines Stage III?

Accepted Answer

Involvement of lymph node regions or lymphoid structures on both sides of the diaphragm

Answer

Involvement of lymph nodes on the same side of the diaphragm

Answer

Liver infiltration

Answer

Disseminated involvement of extralymphatic sites, including bone marrow and bronchial infiltration

Question 4

What is the formula for parenteral iron therapy?

Accepted Answer

4.4 x body weight (kg) x Hb deficit (g/dL)

Answer

3.3 x body weight (kg) x Hb deficit (g/dL)

Answer

2.2 x body weight (kg) x Hb deficit (g/dL)

Answer

1.1 x body weight (kg) x Hb deficit (g/dL)

Question 5

A 40-year-old female patient presents with leg swelling for one day, with no history of fever. Two years prior, she was treated for metastatic breast adenocarcinoma with paclitaxel and radiotherapy. Her vital signs are: Blood pressure 120/76 mmHg, Pulse rate 84/min, temperature 37.6 C, Respiratory rate 16/min, and oxygen saturation 99% on room air. Physical examination revealed warmth and tenderness over the left leg and thigh. Lung auscultation showed clear fields. A urine pregnancy test was negative, and CT chest was normal. Ultrasound of the left leg revealed a thrombus in the superficial femoral vein. What is the most appropriate treatment?

Accepted Answer

Enoxaparin and warfarin therapy with a goal to maintain an INR of 2-3

Answer

Dalteparin and enoxaparin together

Answer

Warfarin therapy with a goal to maintain an INR of 2-3

Answer

Aspirin and warfarin therapy with a goal to maintain an INR of 2-3

Question 6

What is the best test for assessing iron status?

Accepted Answer

Ferritin

Answer

Transferrin

Answer

Serum iron

Answer

Hemoglobin

Question 7

A 43-year-old woman complains of fatigue and night sweats associated with itching for 2 months. On physical examination, there is diffuse nontender lymphadenopathy, including small supraclavicular, epitrochlear, and scalene nodes. CBC and chemistry studies (including liver enzymes) are normal. Chest x-ray shows hilar lymphadenopathy. Which of the following is the best next step in evaluation?

Accepted Answer

Excisional lymph node biopsy

Answer

Monospot test

Answer

Toxoplasmosis IgG serology

Answer

Serum angiotensin-converting enzyme level

Question 8

What is the most common manifestation of moderate/severe Hemophilia A?

Accepted Answer

Recurrent hemarthrosis

Answer

Recurrent muscle bleeding

Answer

Recurrent bleeding from gums

Answer

Recurrent hematuria

Question 9

Plasmapheresis (plasma exchange therapy) is used in the treatment of which of the following conditions?

Accepted Answer

Thrombotic thrombocytopenic purpura

Answer

Autoimmune hemolytic anemia

Answer

Disseminated intravascular coagulation

Answer

Hemolytic uremic syndrome

Question 10

Pancytopenia with splenomegaly is seen in all of the following conditions EXCEPT:

Accepted Answer

Aplastic anemia

Answer

Myelofibrosis

Answer

Hairy cell leukemia

Answer

Polycythemia vera

Hematology — MCQs

Hematology — MCQs

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