Hematology Practice Questions

Q: Which of the following is true about Chronic Lymphocytic Leukemia (CLL)?

Can present as acute leukemia. **Explanation:** Chronic Lymphocytic Leukemia (CLL) is a monoclonal proliferation of mature, functionally incompetent B-lymphocytes. **Why Option A is Correct:** While CLL is typically an indolent (slow-growing) chronic disease, it can undergo a sudden transformation into an aggressive, high-grade malignancy. This is known as **Richter’s Transformation**. In approximately 2–10% of cases, CLL transforms into Diffuse Large B-cell Lymphoma (DLBCL) or, less commonly, into **Prolymphocytic Leukemia (PLL)** or acute leukemia. This clinical shift presents with rapidly worsening lymphadenopathy, fever, and weight loss, mimicking an acute leukemic state. **Analysis of Incorrect Options:** * **Option B:** While CLL is often *incidentally* discovered during routine blood tests (as asymptomatic lymphocytosis), the question asks what is "true" regarding its nature/presentation. Option A is a more specific pathological characteristic of the disease's progression [1]. * **Option C:** Leukocytosis (specifically lymphocytosis >5,000/µL) is a hallmark of CLL. However, in the context of standardized exams, if a "transformation" or "complication" option is provided, it often tests the student's knowledge of the disease's natural history (Richter’s). * **Option D:** CLL is a malignancy of **B-lymphocytes** (CD5+, CD19+, CD20+, and CD23+). **NEET-PG High-Yield Pearls:** * **Smudge Cells (Basket Cells):** Characteristically seen on peripheral smear due to the fragility of lymphocytes. * **Immunophenotype:** Characterized by the co-expression of **CD5** (normally a T-cell marker) and B-cell markers (**CD19, CD23**). * **Hypogammaglobulinemia:** Most common complication leading to recurrent infections [1]. * **Autoimmune Hemolytic Anemia (AIHA):** A frequent paraneoplastic association [1].

Q: A 34-year-old man presents with a 5-month history of weakness and fatigue. There is no history of drug or alcohol abuse. A CBC shows megaloblastic anemia and a normal reticulocyte count. Further laboratory studies reveal vitamin B12 deficiency. Anemia in this patient is most likely caused by which of the following?

Autoimmune gastritis. The patient presents with **megaloblastic anemia** due to **Vitamin B12 deficiency**. In the absence of dietary restrictions (like strict veganism) or drug use, the most common cause of B12 deficiency is **Pernicious Anemia**, which is the end-stage of **Autoimmune Gastritis (Type A Gastritis)** [1, 2]. **Why Autoimmune Gastritis is correct:** Autoimmune gastritis involves the production of autoantibodies against **gastric parietal cells** and **Intrinsic Factor (IF)** [2]. Parietal cells, located in the body and fundus of the stomach, are responsible for secreting hydrochloric acid and IF. Since IF is essential for the absorption of Vitamin B12 in the terminal ileum, its absence leads to malabsorption, resulting in megaloblastic anemia [1]. **Why other options are incorrect:** * **A. Acute erosive gastritis:** This typically presents with hematemesis or melena due to superficial mucosal injury (often from NSAIDs or alcohol) [2]. It does not cause B12 malabsorption. * **C. Helicobacter pylori gastritis:** This is **Type B Gastritis**, primarily affecting the antrum. While it can cause iron deficiency, it does not typically cause the profound parietal cell atrophy required to produce B12 deficiency [2]. * **D. Menetrier disease:** A rare protein-losing hypertrophic gastropathy characterized by enlarged gastric folds and TGF-α overexpression. It leads to hypoproteinemia, not B12 deficiency. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Autoimmune Gastritis affects the **Body and Fundus** (spares the antrum) [2]. * **Markers:** Increased serum **Gastrin** (due to loss of acid feedback) and decreased **Pepsinogen I**. * **Associations:** Often associated with other autoimmune conditions like Vitiligo, Hashimoto’s thyroiditis, and Type 1 Diabetes. * **Risk:** Increased risk of **Gastric Adenocarcinoma** and **Carcinoid tumors**.

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.

Question 1

Which of the following is true about Chronic Lymphocytic Leukemia (CLL)?

Accepted Answer

Can present as acute leukemia

Answer

Diagnosed in routine blood tests

Answer

Leukocytosis is present

Answer

More T lymphocytes are seen

Question 2

All of the following are criteria for diagnosing severe aplastic anemia except?

Accepted Answer

Absolute neutrophil count < 1500/µL

Answer

Bone marrow cellularity < 25%

Answer

Reticulocyte count < 1%

Answer

Platelet count < 20,000/µL

Question 3

A 34-year-old man presents with a 5-month history of weakness and fatigue. There is no history of drug or alcohol abuse. A CBC shows megaloblastic anemia and a normal reticulocyte count. Further laboratory studies reveal vitamin B12 deficiency. Anemia in this patient is most likely caused by which of the following?

Accepted Answer

Autoimmune gastritis

Answer

Acute erosive gastritis

Answer

Helicobacter pylori gastritis

Answer

Menetrier disease

Question 4

Which immunoglobulin class is NOT typically affected in multiple myeloma?

Accepted Answer

IgM

Answer

IgG

Answer

IgA

Answer

IgD

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 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 6

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 7

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 8

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 9

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 10

What is the primary indication for initiating intramuscular iron therapy?

Accepted Answer

Oral iron intolerance

Answer

Pregnancy

Answer

Postpartum period

Answer

Emergency surgery

Hematology — MCQs

Hematology — MCQs

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