Hematology Practice Questions

Q: A 30-year-old man presents with anemia, clinical jaundice, and splenomegaly. He has an autosomal dominant disorder for which splenectomy is the only treatment. What is the most likely diagnosis?

Hereditary spherocytosis. ### Explanation **Correct Option: B. Hereditary Spherocytosis (HS)** The clinical triad of **anemia, jaundice, and splenomegaly** in a young patient suggests chronic hemolysis. Hereditary Spherocytosis is an **autosomal dominant** disorder (most common inheritance) caused by defects in red blood cell membrane proteins (Ankyrin, Spectrin, or Band 3). This leads to the formation of spherical RBCs that are prematurely destroyed in the splenic cords. **Splenectomy** is considered the definitive treatment for HS as it stops the site of hemolysis, corrects the anemia, and prevents gallstone formation. **Why other options are incorrect:** * **A. Thalassemia:** This is an **autosomal recessive** disorder. While splenectomy may be performed for hypersplenism or to reduce transfusion requirements, it is not the "only" or definitive treatment; the mainstay is blood transfusion and iron chelation. * **C. Sickle Cell Disease:** This is also **autosomal recessive**. Splenectomy is rarely indicated because these patients usually undergo "autosplenectomy" (splenic infarction) by early childhood. * **D. Idiopathic Autoimmune Hemolytic Anemia (AIHA):** This is an **acquired** condition, not an autosomal dominant genetic disorder. The first-line treatment is typically corticosteroids, not surgery. **NEET-PG High-Yield Pearls:** * **Diagnosis of HS:** Increased MCHC (highly specific), positive Osmotic Fragility Test, and Eosin-5-maleimide (EMA) binding test (Gold Standard). * **Surgical Timing:** Splenectomy is ideally delayed until after age 5–6 to reduce the risk of OPSI (Overwhelming Post-Splenectomy Infection). * **Prophylaxis:** Post-splenectomy patients must receive vaccinations against *S. pneumoniae*, *H. influenzae*, and *N. meningitidis* (ideally 2 weeks before elective surgery). * **Associated Finding:** Pigmented (calcium bilirubinate) gallstones are common in HS; always check the gallbladder before splenectomy.

Q: All are true about thrombotic thrombocytopenic purpura except?

Grossly abnormal coagulation tests. Thrombotic Thrombocytopenic Purpura (TTP) is a microangiopathic disorder caused by a deficiency in the **ADAMTS13** enzyme (a vWF-cleaving protease). This leads to large von Willebrand factor (vWF) multimers that cause spontaneous platelet aggregation and microthrombi formation. **1. Why Option D is the Correct Answer:** In TTP, the primary pathology is **platelet consumption**, not a failure of the coagulation cascade [1]. Therefore, **coagulation tests (PT, aPTT, and Fibrinogen) remain normal**. If these tests were grossly abnormal (prolonged PT/aPTT and low fibrinogen), the diagnosis would shift toward **Disseminated Intravascular Coagulation (DIC)** [1]. This distinction is a classic high-yield differentiator in hematology. **2. Why other options are incorrect:** * **A & B (MAHA and Thrombocytopenia):** These are the two mandatory components of the TTP diagnosis [1]. Microangiopathic Hemolytic Anemia (MAHA) is characterized by schistocytes on a peripheral smear, while thrombocytopenia results from the consumption of platelets in microthrombi [1]. * **C (Normal complement level):** TTP is not an immune-complex-mediated consumption disorder like SLE or certain glomerulonephritides; thus, complement levels (C3, C4) are typically normal. **High-Yield Clinical Pearls for NEET-PG:** * **The Classic Pentad:** (1) Microangiopathic Hemolytic Anemia (MAHA), (2) Thrombocytopenia, (3) Fever, (4) Renal failure, and (5) Neurological symptoms. (Note: Only the first two are required for a presumptive diagnosis). * **Treatment:** The treatment of choice is **Plasmapheresis (Plasma Exchange)**. * **Contraindication:** Platelet transfusion is generally **contraindicated** as it may "fuel the fire" of microthrombi formation. * **Peripheral Smear:** Always look for **Schistocytes** (fragmented RBCs).

Q: A patient presents with a hemoglobin of 5 g%, total leukocyte count of 9000/cc, differential leukocyte count showing 3% neutrophils and 75% lymphoblasts, and has had a fever for 1 month. Which of the following management options would be appropriate?

Intravenous Ciprofloxacin. This question tests the clinical management of **Febrile Neutropenia** in the context of Acute Lymphoblastic Leukemia (ALL). ### **Explanation** The patient presents with **Febrile Neutropenia**. * **Neutropenia** is defined as an Absolute Neutrophil Count (ANC) < 1500 cells/mm³. * **Severe Neutropenia** is ANC < 500 cells/mm³. * In this patient, ANC = Total Leukocyte Count × % of Neutrophils = $9000 \times 0.03 = \mathbf{270\ cells/mm^3}$. Since the patient has severe neutropenia and a fever lasting one month, this is a medical emergency. The standard of care is the immediate administration of **Intravenous (IV) broad-spectrum antibiotics** to prevent life-threatening sepsis. ### **Why other options are incorrect:** * **B. Colony stimulating factor (G-CSF):** While G-CSF can shorten the duration of neutropenia, it is not the primary treatment for an active infection/fever. Antibiotics take precedence. * **C. Packed cell transfusion:** Although the patient is anemic (Hb 5 g%), the immediate life-threatening issue is the infection [2]. Transfusion is supportive, but the "management of choice" for the febrile component is antibiotics. * **D. Oral Ciprofloxacin:** Oral antibiotics are only reserved for "Low-Risk" patients (MASCC score ≥ 21). A patient with leukemia and prolonged fever is "High-Risk" and requires IV therapy [3]. ### **Clinical Pearls for NEET-PG:** 1. **ANC Calculation:** Always calculate the ANC (TLC × % Neutrophils + % Bands). 2. **Empiric Choice:** Monotherapy with an antipseudomonal beta-lactam (e.g., Piperacillin-Tazobactam, Cefepime, or Meropenem) is usually the first line. 3. **High-Risk Criteria:** Patients with ANC < 100, hemodynamic instability, or significant comorbidities must be admitted for IV antibiotics [1]. 4. **Blast Cells:** The presence of 75% lymphoblasts confirms a diagnosis of Acute Leukemia [1].

Q: In which condition is the following finding in the tongue commonly seen?

Iron deficiency anemia. ***Iron deficiency anemia*** - **Atrophic glossitis** is the classic tongue finding, presenting as a **smooth, pale, and depapillated tongue** due to loss of filiform papillae. - This finding occurs due to **iron's role in epithelial cell renewal** and is often accompanied by **angular cheilitis** and **koilonychia** (spoon-shaped nails). *Sickle cell anemia* - Primarily causes **vaso-occlusive crises** and **hemolytic anemia** but does not typically present with atrophic glossitis. - Tongue findings are uncommon; patients more often develop **leg ulcers**, **priapism**, and **acute chest syndrome**. *Acute myeloid leukemia (AML)* - Commonly presents with **gingival hyperplasia** and **bleeding gums** due to thrombocytopenia, not atrophic glossitis. - Oral manifestations include **petechiae**, **ecchymoses**, and **oral infections** due to neutropenia. *Myelodysplastic syndrome (MDS)* - Primarily causes **pancytopenia** with **dysplastic changes** in bone marrow cells, not specific tongue abnormalities. - Oral manifestations are usually related to **thrombocytopenia** (bleeding) and **neutropenia** (infections), not atrophic glossitis.

Q: Which of the following parameters will fall the earliest in iron deficiency?

MCV. In iron deficiency anemia (IDA), the depletion of iron stores occurs in a predictable sequence. Understanding the kinetics of red cell indices is crucial for NEET-PG. **Why MCV is the correct answer:** As iron stores are exhausted, the bone marrow begins to produce smaller red cells (microcytosis) before the hemoglobin concentration within those cells significantly drops [1]. **Mean Corpuscular Volume (MCV)** measures the average size of the RBC. In the progression of IDA, microcytosis (low MCV) typically precedes hypochromia (low MCH/MCHC) [1]. Therefore, MCV is the first of the standard indices (MCV, MCH, MCHC) to fall below the reference range. **Analysis of Incorrect Options:** * **B. MCH (Mean Corpuscular Hemoglobin):** This measures the average amount of hemoglobin per RBC. While it falls early, it generally follows the decrease in MCV. * **C. MCHC (Mean Corpuscular Hemoglobin Concentration):** This is the last index to decrease. It reflects the "concentration" of hemoglobin; cells become smaller first to maintain concentration before eventually becoming pale (hypochromic). * **D. Red Cell Distribution Width (RDW):** RDW actually **increases** (not falls) in iron deficiency. It is often the very first sign of IDA on a CBC, representing anisocytosis (variation in cell size) as new small cells mix with older normal-sized cells. **High-Yield Clinical Pearls for NEET-PG:** 1. **Earliest Biochemical Marker:** Serum Ferritin (reflects storage iron). 2. **Earliest Hematological Change:** Increased RDW (Red Cell Distribution Width). 3. **Earliest Index to Fall:** MCV. 4. **Gold Standard Diagnosis:** Bone marrow aspiration (Perl’s Prussian Blue stain) showing absent haemosiderin [1]. 5. **Mentzer Index:** MCV/RBC count. If 13, suggests Iron Deficiency Anemia.

Q: A 26-year-old woman presents with weakness, dyspnea, and palpitations. Examination reveals severe pallor. She recently experienced a viral infection. Liver function tests show elevated bilirubin levels. Ultrasound reveals splenomegaly and gallstones. Her mother, who is standing nearby, also appears pale and has splenomegaly. What is the probable diagnosis?

Hereditary spherocytosis. **Explanation:** The clinical presentation points toward **Hereditary Spherocytosis (HS)**, an autosomal dominant disorder caused by defects in red blood cell (RBC) membrane proteins (most commonly **Ankyrin**, followed by Spectrin) [1]. **Why Option B is correct:** 1. **Hemolytic Anemia:** Weakness, pallor, and elevated bilirubin indicate hemolysis [1]. 2. **Triad:** The classic triad of HS is **anemia, jaundice, and splenomegaly**. 3. **Complications:** Chronic hemolysis leads to increased bilirubin excretion, resulting in **pigment gallstones** (cholelithiasis), even in young patients. 4. **Family History:** The mother’s similar symptoms suggest an autosomal dominant inheritance pattern. 5. **Trigger:** Viral infections (like Parvovirus B19) can trigger "aplastic crises" or "hemolytic crises," worsening the symptoms. **Why other options are incorrect:** * **A. Gilbert’s Syndrome:** Causes isolated indirect hyperbilirubinemia without anemia, splenomegaly, or gallstones. * **C. G6PD Deficiency:** An X-linked recessive disorder (rare in females) characterized by episodic hemolysis triggered by oxidative stress (drugs/fava beans) [2]. It does not typically cause chronic splenomegaly. * **D. Paroxysmal Nocturnal Hemoglobinuria (PNH):** An acquired stem cell defect presenting with intravascular hemolysis and venous thrombosis; it lacks a strong family history. **NEET-PG High-Yield Pearls:** * **Gold Standard Test:** Eosin-5-maleimide (EMA) binding test via flow cytometry. * **Screening Test:** Osmotic Fragility Test (increased fragility). * **Peripheral Smear:** Spherocytes (small, dark RBCs lacking central pallor) and increased MCHC (>36 g/dL) [1]. * **Treatment of Choice:** Splenectomy (usually deferred until after age 6 to reduce sepsis risk) [1].

Q: All are TRUE about paroxysmal cold hemoglobinuria (PCH), EXCEPT:

Lysis of red blood cells occurs at low temperatures. Explanation: Paroxysmal Cold Hemoglobinuria (PCH) is a rare form of autoimmune hemolytic anemia characterized by the presence of the **Donath-Landsteiner antibody**, a biphasic IgG autoantibody directed against the P-antigen on red blood cells (RBCs). **Why Option D is the Correct Answer (The False Statement):** The hallmark of PCH is its **biphasic** nature. The Donath-Landsteiner antibodies bind to RBCs only at **low temperatures** (cold phase), but the actual **lysis (complement-mediated hemolysis) occurs at 37°C** (warm phase) when the blood recirculates to the body's core. Therefore, stating that lysis occurs at low temperatures is physiologically incorrect. **Analysis of Other Options:** * **Option A:** PCH is most commonly seen in **children**, often following a viral (e.g., Measles, Mumps, EBV) or upper respiratory infection. * **Option B:** In its acute form (post-viral), PCH is typically **self-limited**, resolving within a few days to weeks once the inciting infection clears. * **Option C:** The **Donath-Landsteiner antibody** is the pathognomonic finding. It is an IgG antibody that fixes complement (C3) in the cold [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Antibody Type:** IgG (unlike Cold Agglutinin Disease, which is typically IgM) [1]. * **Specificity:** Anti-P antibody. * **Direct Antiglobulin Test (DAT):** Usually positive for **C3** only; negative for IgG (as the antibody dissociates at warmer temperatures) [1]. * **Historical Context:** Historically associated with late-stage syphilis; currently most common in pediatric post-viral settings. * **Clinical Presentation:** Sudden onset of dark "cola-colored" urine (hemoglobinuria) after cold exposure, accompanied by fever and chills.

Q: A patient receiving low molecular weight heparin (LMWH) suddenly develops hemorrhage. What is the next step in management?

Level of Factor Xa activity. The correct management for monitoring or assessing complications of **Low Molecular Weight Heparin (LMWH)** is the measurement of **Factor Xa activity**. [1] **1. Why Factor Xa activity is correct:** LMWH (e.g., Enoxaparin) acts primarily by inhibiting Factor Xa rather than Thrombin (Factor IIa), with a ratio of approximately 3:1 to 4:1. [1] Unlike Unfractionated Heparin (UFH), LMWH has a predictable pharmacokinetic profile and usually does not require routine monitoring. [4] However, in specific scenarios—such as **active hemorrhage**, renal failure, pregnancy, or extreme obesity—monitoring is essential. Since LMWH does not significantly prolong global coagulation tests, the **anti-Xa assay** is the only reliable method to quantify its anticoagulant effect. **2. Why other options are incorrect:** * **APTT (Option B):** This is the standard test for monitoring **Unfractionated Heparin (UFH)**. [3], [4] LMWH molecules are too short to bridge antithrombin to thrombin effectively, resulting in minimal to no change in APTT even at therapeutic doses. * **Platelet Count (Option C):** While used to screen for Heparin-Induced Thrombocytopenia (HIT), it does not measure the anticoagulant intensity or explain an acute hemorrhage caused by drug overdose. * **Prothrombin Time (Option D):** PT/INR is used to monitor Warfarin (extrinsic pathway) [2] and is not affected by LMWH. **Clinical Pearls for NEET-PG:** * **Antidote:** Protamine sulfate only partially neutralizes LMWH (approx. 60-75%), whereas it completely reverses UFH. * **Renal Clearance:** LMWH is renally excreted; thus, it is contraindicated in patients with ESRD (CrCl <30 ml/min). UFH is preferred in such cases. * **Monitoring:** Routine monitoring is NOT required for LMWH, unlike UFH. Anti-Xa levels should be drawn 4 hours after the dose (peak level). [4]

Question 1

A 30-year-old man presents with anemia, clinical jaundice, and splenomegaly. He has an autosomal dominant disorder for which splenectomy is the only treatment. What is the most likely diagnosis?

Accepted Answer

Hereditary spherocytosis

Answer

Thalassemia

Answer

Sickle cell disease

Answer

Idiopathic autoimmune hemolytic anemia

Question 2

What is the primary abnormality in the sequence of events leading to Disseminated Intravascular Coagulation (DIC)?

Accepted Answer

Uncontrolled thrombin generation

Answer

Fibrin deposits in multiple sites

Answer

Abnormal adhesion and consumption of platelets

Answer

Destruction of red cells

Question 3

All are true about thrombotic thrombocytopenic purpura except?

Accepted Answer

Grossly abnormal coagulation tests

Answer

Microangiopathic hemolytic anemia

Answer

Thrombocytopenia

Answer

Normal complement level

Question 4

A 63-year-old woman experiences a burning sensation in her hands and feet. Two months prior, she had an episode of swelling with tenderness in the right leg, followed by dyspnea and right-sided chest pain. Physical examination reveals splenomegaly and hepatomegaly. CBC shows hemoglobin, 13.3 g/dL; hematocrit, 40.1%; MCV, 91 mm3; platelet count, 657,000/mm3; and WBC count, 17,400/mm3. The peripheral blood smear shows abnormally large platelets. Which of the following is the most likely diagnosis?

Accepted Answer

Essential thrombocytosis

Answer

Acute myelogenous leukemia

Answer

Chronic myelogenous leukemia

Answer

Myelofibrosis with myeloid metaplasia

Question 5

A patient presents with a hemoglobin of 5 g%, total leukocyte count of 9000/cc, differential leukocyte count showing 3% neutrophils and 75% lymphoblasts, and has had a fever for 1 month. Which of the following management options would be appropriate?

Accepted Answer

Intravenous Ciprofloxacin

Answer

Colony stimulating factor

Answer

Packed cell transfusion

Answer

Oral Ciprofloxacin

Question 6

In which condition is the following finding in the tongue commonly seen?

Accepted Answer

Iron deficiency anemia

Answer

Sickle cell anemia

Answer

Acute myeloid leukemia (AML)

Answer

Myelodysplastic syndrome (MDS)

Question 7

Which of the following parameters will fall the earliest in iron deficiency?

Accepted Answer

MCV

Answer

MCH

Answer

MCHC

Answer

Red cell distribution width

Question 8

A 26-year-old woman presents with weakness, dyspnea, and palpitations. Examination reveals severe pallor. She recently experienced a viral infection. Liver function tests show elevated bilirubin levels. Ultrasound reveals splenomegaly and gallstones. Her mother, who is standing nearby, also appears pale and has splenomegaly. What is the probable diagnosis?

Accepted Answer

Hereditary spherocytosis

Answer

Gilbert's syndrome

Answer

G6PD deficiency

Answer

Paroxysmal nocturnal hemoglobinuria

Question 9

All are TRUE about paroxysmal cold hemoglobinuria (PCH), EXCEPT:

Accepted Answer

Lysis of red blood cells occurs at low temperatures

Answer

It occurs mostly in children

Answer

It is self-limited

Answer

Donath-Landsteiner antibody is present

Question 10

A patient receiving low molecular weight heparin (LMWH) suddenly develops hemorrhage. What is the next step in management?

Accepted Answer

Level of Factor Xa activity

Answer

Activated partial thromboplastin time (APTT)

Answer

Platelet count

Answer

Prothrombin time (PT)

Hematology — MCQs

Hematology — MCQs

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