Hematology Practice Questions

Q: Which immunoglobulin class is NOT typically affected in multiple myeloma?

IgM. **Explanation:** Multiple myeloma (MM) is a neoplastic proliferation of a single clone of **plasma cells** derived from the B-cell lineage [1]. These malignant plasma cells typically produce a monoclonal (M) protein, which is most commonly an intact immunoglobulin of the **IgG** or **IgA** class. **Why IgM is the correct answer:** IgM is the characteristic immunoglobulin associated with **Waldenström Macroglobulinemia (WM)**, not Multiple Myeloma [1]. While rare cases of "IgM Myeloma" exist, they are clinically distinct and often represent a hybrid between MM and WM. In the context of standard medical examinations, IgM is excluded from the typical presentation of MM because the malignant transformation in MM usually occurs in plasma cells that have already undergone **isotype class switching** (from IgM to IgG, IgA, or IgD). **Analysis of incorrect options:** * **IgG (Option A):** The most common subtype, accounting for approximately 50-60% of cases. * **IgA (Option B):** The second most common subtype, accounting for about 20-25% of cases. * **IgD (Option D):** A rare but recognized subtype (approx. 1-2%). It is often associated with a more aggressive clinical course, younger age of onset, and a higher frequency of Bence-Jones proteinuria and renal failure. **High-Yield Clinical Pearls for NEET-PG:** * **M-Spike:** Found on Serum Protein Electrophoresis (SPEP); usually in the Gamma or Beta region. * **CRAB Criteria:** Calcium (elevated), Renal insufficiency, Anemia, and Bone lesions (lytic). * **Diagnosis:** Requires ≥10% clonal plasma cells on bone marrow biopsy plus a myeloma-defining event. * **Bence-Jones Proteins:** These are free monoclonal light chains (Kappa or Lambda) found in the urine. * **Rule of Thumb:** If the question mentions IgM + Hyperviscosity + Lymphadenopathy, think Waldenström Macroglobulinemia [1]. If it mentions IgG/IgA + Lytic bone lesions, think Multiple Myeloma.

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 a fever for 1 month. What is the most appropriate initial drug to use?

Intravenous Ciprofloxacin. **Explanation:** The patient presents with clinical features suggestive of **Acute Lymphoblastic Leukemia (ALL)** (high lymphoblast count, severe anemia) [1] and **Febrile Neutropenia** [2]. The key to this question lies in calculating the **Absolute Neutrophil Count (ANC)**. * ANC = Total Leukocyte Count (TLC) × % of Neutrophils * ANC = 9000 × 3% = **270/mm³** **Febrile Neutropenia** is defined as a single oral temperature of >101°F (38.3°C) or >100.4°F (38.0°C) for over one hour, in a patient with an ANC <500/mm³. This is a medical emergency [2]. The standard of care is the immediate administration of **empiric broad-spectrum intravenous antibiotics** to prevent life-threatening sepsis. **Analysis of Options:** * **Option A (Correct):** Intravenous antibiotics (like Ciprofloxacin or more commonly Beta-lactams like Piperacillin-Tazobactam) are the priority to cover potential Gram-negative and Gram-positive infections in a neutropenic state. * **Option B:** Colony-stimulating factors (G-CSF) are used to shorten the duration of neutropenia but do not treat the acute infection. * **Option C:** While the patient is severely anemic (Hb 5g%), stabilizing the infection in a febrile neutropenic patient takes precedence over transfusion unless there is active hemodynamic instability. * **Option D:** Oral antibiotics are only reserved for "low-risk" patients (MASCC score ≥21). A patient with new-onset leukemia and prolonged fever is considered "high-risk" and requires IV therapy. **Clinical Pearls for NEET-PG:** * **Most common source of infection:** Endogenous flora (skin/gut). * **Most common organisms:** Historically Gram-negative (*Pseudomonas*), but currently Gram-positive cocci are more frequent. * **Initial Management:** Start IV antibiotics within **60 minutes** of presentation ("The Golden Hour").

Q: A 26-year-old female presents with postpartum hemorrhage on her second postnatal day. Her activated partial thromboplastin time (APTT) is prolonged, while bleeding time, prothrombin time, and platelet count are normal. What is the likely diagnosis?

Acquired hemophilia A. **Explanation:** The clinical presentation of delayed postpartum hemorrhage (PPH) associated with an **isolated prolongation of APTT** (with normal PT, BT, and platelet count) is a classic hallmark of **Acquired Hemophilia A (AHA)**. **1. Why Acquired Hemophilia A is correct:** AHA is a rare but life-threatening autoimmune disorder caused by the development of autoantibodies (inhibitors) against Factor VIII. It has a bimodal age distribution, with one peak occurring in women during the postpartum period (usually within 1–4 months, but can occur within days). Because only Factor VIII is affected, the intrinsic pathway is disrupted, leading to a prolonged APTT, while the extrinsic pathway (PT) and primary hemostasis (Platelets/BT) remain unaffected. **2. Why the other options are incorrect:** * **Lupus Anticoagulant:** While it prolongs APTT, it is clinically associated with **thrombosis** (pro-thrombotic state) rather than active mucosal or postpartum bleeding. * **DIC:** This is a consumptive coagulopathy. You would expect **abnormalities in all parameters**: prolonged PT/APTT, decreased platelet count, and decreased fibrinogen. * **Inherited Congenital Hemophilia:** This is an X-linked recessive disorder that almost exclusively affects **males**. A 26-year-old female presenting with a new-onset bleeding disorder is highly unlikely to have a congenital form. **Clinical Pearls for NEET-PG:** * **Mixing Study:** In AHA, the prolonged APTT **does not correct** upon mixing the patient's plasma with normal plasma (distinguishes it from simple factor deficiency). * **Treatment:** Management involves bypassing agents (e.g., Recombinant Factor VIIa or Activated Prothrombin Complex Concentrate) and immunosuppression (steroids/cyclophosphamide) to eliminate the inhibitor. * **High-Yield Association:** Postpartum state is the most common "trigger" for AHA in young women.

Q: A 28-year-old female presented with malaise and generalized weakness for the past 6 months. Her appetite is reduced, and she experiences intermittent giddiness and palpitations. There was no organomegaly. Laboratory studies showed normochromic to hypochromic anemia with an MCV of 80. What is the diagnosis?

Iron deficiency anemia. **Explanation:** The clinical presentation of a young female with chronic malaise, weakness, palpitations, and reduced appetite is highly suggestive of **Iron Deficiency Anemia (IDA)**, the most common cause of anemia worldwide, especially in women of reproductive age [1], [2]. **Why Iron Deficiency Anemia is correct:** IDA typically presents as a **microcytic hypochromic** anemia. However, in the early stages (Stage 2: Iron-deficient erythropoiesis), the MCV may still be within the **low-normal range (around 80 fL)** before it progressively drops [2]. The absence of organomegaly is a key negative finding that supports IDA over hemolytic or infiltrative disorders [2]. **Analysis of Incorrect Options:** * **Thalassemia minor:** While it presents with microcytosis, the MCV is usually significantly lower (often 100 fL) and macrocytic blood picture, which contradicts the normo-hypochromic findings here [3]. **NEET-PG High-Yield Pearls:** * **Mentzer Index:** MCV/RBC count. 13 suggests IDA. * **Best Initial Test for IDA:** Serum Ferritin (decreased). It is the most sensitive and specific lab test. * **Earliest Sign of Response to Iron Therapy:** Reticulocytosis (usually peaks within 7–10 days). * **Pica and Koilonychia:** Specific clinical signs associated with chronic, severe iron deficiency.

Q: Which of the following is NOT true regarding multiple myeloma?

Increased alkaline phosphatase. In Multiple Myeloma (MM), the hallmark of bone involvement is **purely osteoclastic (lytic) activity** without any compensatory osteoblastic activity [1]. **Explanation of the Correct Answer:** * **Option C (Increased Alkaline Phosphatase):** This is the correct answer because it is **NOT** true. Serum Alkaline Phosphatase (ALP) is a marker of osteoblastic (bone-forming) activity. In MM, malignant plasma cells produce "Osteoclast Activating Factors" (like RANKL and IL-6) and simultaneously secrete DKK-1, which **inhibits osteoblasts**. Since there is no new bone formation, ALP levels typically remain **normal**, even in the presence of extensive bone destruction. This distinguishes MM from bone metastases (e.g., prostate cancer) or Paget’s disease [3], where ALP is elevated. **Explanation of Incorrect Options:** * **Option A & B (Bone pain & Lytic lesions):** These are classic features [1]. Over 80% of patients present with bone pain. Lytic "punched-out" lesions are caused by uncontrolled osteoclast activation, commonly seen in the skull, spine, and pelvis. * **Option D (TRAP positive):** Tartrate-Resistant Acid Phosphatase (TRAP) is a histochemical marker for **osteoclasts** [2]. Since MM is characterized by intense osteoclastic resorption, TRAP staining is positive in areas of active bone destruction. (Note: TRAP is also a classic marker for Hairy Cell Leukemia). **High-Yield Clinical Pearls for NEET-PG:** * **CRAB Criteria:** Calcium (High), Renal insufficiency, Anemia, Bone lesions. * **Imaging:** X-rays (Skeletal Survey) are preferred over Bone Scans [1]. Bone scans (Technetium-99m) are often **false negative** because they require osteoblastic activity to show "hot spots." * **M-Spike:** Found on Serum Protein Electrophoresis (usually IgG > IgA) [1]. * **Bence-Jones Proteins:** Free light chains in urine (detected by sulfosalicylic acid test, not by standard dipstick).

Q: What is the primary indication for initiating intramuscular iron therapy?

Oral iron intolerance. **Explanation:** The primary indication for parenteral iron therapy (intramuscular or intravenous) is the **inability to tolerate or absorb oral iron**. Oral iron is the first-line treatment for iron deficiency anemia due to its safety and low cost. However, many patients experience significant gastrointestinal side effects (nausea, abdominal cramps, constipation, or diarrhea) or have malabsorption syndromes (e.g., Celiac disease, post-gastrectomy), making oral therapy ineffective or impossible. **Analysis of Options:** * **Oral iron intolerance (Correct):** This is the most common clinical reason to switch to parenteral routes. If the patient cannot take the medication, the deficiency cannot be corrected. * **Pregnancy (Incorrect):** Oral iron is the standard of care during pregnancy. Parenteral iron is reserved only for severe anemia in late pregnancy or when oral iron fails/is not tolerated. * **Postpartum period (Incorrect):** Routine postpartum anemia is managed with oral iron unless there is severe hemodynamic instability or significant blood loss requiring transfusion. * **Emergency surgery (Incorrect):** Parenteral iron takes 1–2 weeks to significantly raise hemoglobin levels. In an emergency surgical setting with acute blood loss, **blood transfusion** is the treatment of choice for immediate stabilization. **High-Yield NEET-PG Pearls:** * **Rate of Response:** Parenteral iron does **not** raise hemoglobin levels faster than oral iron; it only replenishes iron stores more rapidly. * **Calculation:** The total dose of parenteral iron required is calculated using the **Ganzoni Formula**: *Body weight (kg) × (Target Hb - Actual Hb) × 2.4 + Iron stores (500mg).* * **Adverse Effects:** The most serious risk of IM/IV iron is **anaphylaxis**. For IM injections, the **Z-track technique** must be used to prevent skin staining.

Q: A patient with a blood pressure of 90/60 mm Hg presents with pronounced cyanosis. Blood drawn from peripheral veins is observed to be chocolate brown in colour. What is the most likely diagnosis?

Methemoglobinemia. The clinical presentation of **pronounced cyanosis** unresponsive to oxygen, combined with **chocolate-brown colored blood**, is a classic hallmark of **Methemoglobinemia**. **1. Why Methemoglobinemia is correct:** Methemoglobinemia occurs when the iron in hemoglobin is oxidized from the **ferrous (Fe²⁺)** state to the **ferric (Fe³⁺)** state. Ferric iron cannot bind oxygen. Furthermore, the presence of ferric iron causes a "left shift" in the oxygen-dissociation curve, meaning the remaining ferrous heme groups bind oxygen too tightly, preventing its release to tissues [2]. The characteristic chocolate-brown color of the blood is due to the dark pigment of methemoglobin, which does not change color even when exposed to 100% oxygen [1]. **2. Why the other options are incorrect:** * **Hypovolemic, Cardiogenic, and Hemorrhagic Shock:** While these conditions can cause hypotension (90/60 mm Hg) and peripheral cyanosis due to poor tissue perfusion (stagnant hypoxia), they **do not** change the color of the blood to chocolate brown. In these types of shock, the blood remains dark red (deoxygenated) but turns bright red upon exposure to oxygen or during arterial sampling. **3. Clinical Pearls for NEET-PG:** * **The "Saturation Gap":** A key diagnostic clue is a significant difference (>5%) between the oxygen saturation measured by pulse oximetry (which is falsely low, often hovering around 85%) and the arterial oxygen saturation (SaO₂) calculated on an ABG. * **Common Triggers:** Exposure to oxidizing agents like **Nitrites, Benzocaine, Dapsone, or Primaquine** [1], [2]. * **Antidote:** The treatment of choice is **Methylene Blue** (acts as an electron donor to reduce Fe³⁺ back to Fe²⁺). * **Note:** Methylene blue is ineffective in patients with **G6PD deficiency**; in such cases, Vitamin C or exchange transfusion is used.

Q: A 32-year-old male presents with abdominal pain and vomiting. He also complains of psychiatric symptoms and visual hallucinations. What is the most likely diagnosis?

Intermittent Porphyria. ### Explanation The correct diagnosis is **Acute Intermittent Porphyria (AIP)**. This condition is an autosomal dominant metabolic disorder caused by a deficiency in the enzyme **Porphobilinogen deaminase (PBG-D)**, leading to the accumulation of porphyrin precursors like ALA and PBG. **Why it is correct:** AIP is classically characterized by the **"Triad of Ps"**: 1. **P**ain in abdomen (most common symptom, often severe and colicky). 2. **P**sychological symptoms (anxiety, agitation, hallucinations, or psychosis). 3. **P**olyneuropathy (motor weakness). The patient’s presentation of abdominal pain, vomiting, and visual hallucinations fits the classic "neurovisceral" attack of AIP. Notably, unlike other porphyrias, AIP **does not** present with cutaneous photosensitivity. **Why other options are incorrect:** * **Hypo/Hyperthyroidism:** While thyroid disorders can cause psychiatric symptoms (depression in hypo; anxiety/psychosis in hyper), they do not typically present with acute, severe abdominal pain and vomiting as the primary clinical feature. * **Hysteria:** This is a diagnosis of exclusion. Given the systemic nature of the symptoms (vomiting and abdominal pain), an organic cause like porphyria must be ruled out first. AIP is often misdiagnosed as a psychiatric disorder or a surgical emergency. **NEET-PG High-Yield Pearls:** * **Enzyme Defect:** Porphobilinogen deaminase (also known as Hydroxymethylbilane synthase). * **Urine Finding:** Urine turns **"Port-wine red"** on standing due to the oxidation of porphobilinogen to porphobilin. * **Precipitating Factors:** Barbiturates, sulfonamides, alcohol, and fasting (the "5 Ps": **P**ills, **P**upping/Pregnancy, **P**aint/Alcohol, **P**hage/Starvation, **P**eriods). * **Treatment:** Intravenous **Hemin** (suppresses ALA synthase) and high-dose glucose.

Question 1

Which immunoglobulin class is NOT typically affected in multiple myeloma?

Accepted Answer

IgM

Answer

IgG

Answer

IgA

Answer

IgD

Question 2

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 a fever for 1 month. What is the most appropriate initial drug to use?

Accepted Answer

Intravenous Ciprofloxacin

Answer

Colony stimulating factor

Answer

Packed cell transfusion

Answer

Oral Ciprofloxacin

Question 3

A 26-year-old female presents with postpartum hemorrhage on her second postnatal day. Her activated partial thromboplastin time (APTT) is prolonged, while bleeding time, prothrombin time, and platelet count are normal. What is the likely diagnosis?

Accepted Answer

Acquired hemophilia A

Answer

Lupus anticoagulant

Answer

Disseminated intravascular coagulation (DIC)

Answer

Inherited congenital hemophilia

Question 4

A 28-year-old female presented with malaise and generalized weakness for the past 6 months. Her appetite is reduced, and she experiences intermittent giddiness and palpitations. There was no organomegaly. Laboratory studies showed normochromic to hypochromic anemia with an MCV of 80. What is the diagnosis?

Accepted Answer

Iron deficiency anemia

Answer

Thalassemia minor

Answer

Chronic malaria

Answer

Folate deficiency

Question 5

Which of the following is NOT true regarding multiple myeloma?

Accepted Answer

Increased alkaline phosphatase

Answer

Bone pain

Answer

Lytic lesions

Answer

Tartrate-resistant acid phosphatase positive

Question 6

Which of the following is true for Stage IA of Hodgkin's lymphoma?

Accepted Answer

Radiotherapy is the best treatment.

Answer

Chemotherapy is the best treatment.

Answer

Total radiation therapy is the best treatment.

Answer

Fever and weight loss are always present.

Question 7

What is the primary indication for initiating intramuscular iron therapy?

Accepted Answer

Oral iron intolerance

Answer

Pregnancy

Answer

Postpartum period

Answer

Emergency surgery

Question 8

Which of the following agents is of value in the postoperative care of the hemophilic patient?

Accepted Answer

Aminocaproic acid

Answer

Vitamin K

Answer

Monsel's solution

Answer

Factor 8 cryoprecipitate

Question 9

A patient with a blood pressure of 90/60 mm Hg presents with pronounced cyanosis. Blood drawn from peripheral veins is observed to be chocolate brown in colour. What is the most likely diagnosis?

Accepted Answer

Methemoglobinemia

Answer

Hypovolemic shock

Answer

Cardiogenic shock

Answer

Hemorrhagic shock

Question 10

A 32-year-old male presents with abdominal pain and vomiting. He also complains of psychiatric symptoms and visual hallucinations. What is the most likely diagnosis?

Accepted Answer

Intermittent Porphyria

Answer

Hypothyroidism

Answer

Hyperthyroidism

Answer

Hysteria

Hematology — MCQs

Hematology — MCQs

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