Hematology Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Hematology. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Hematology Indian Medical PG Question 1: Which of the following is the most common myeloproliferative disorder?
- A. Essential Thrombocythemia (Correct Answer)
- B. Polycythemia rubra vera
- C. CML
- D. Myelofibrosis
Hematology Explanation: ***Essential Thrombocythemia***
- **Essential thrombocythemia (ET)** is the **most common myeloproliferative neoplasm**, with an incidence of approximately 1.5-2.4 per 100,000 per year.
- It is characterized by **persistent thrombocytosis** (platelet count >450,000/μL) and megakaryocytic proliferation [1].
- Commonly associated with **JAK2 V617F mutation** (~55-60%), **CALR mutations** (~25-30%), and **MPL mutations** (~3-5%) [2].
*Polycythemia rubra vera*
- **Polycythemia vera (PV)** is the **second most common** classic MPN, with an incidence of approximately 0.8-2.3 per 100,000 per year.
- Characterized by increased red blood cell mass, often with leukocytosis and thrombocytosis [1].
- Strongly associated with **JAK2 V617F mutation** (present in >95% of cases) [2][3].
*CML*
- **Chronic myeloid leukemia (CML)** has similar incidence to PV (approximately 1-2 per 100,000 per year).
- Defined by the presence of the **Philadelphia chromosome (BCR-ABL1 fusion gene)** [2].
- Treated distinctly with tyrosine kinase inhibitors (TKIs).
*Myelofibrosis*
- **Primary myelofibrosis (PMF)** is the **least common** of the classic MPNs, with an incidence of approximately 0.3-1.5 per 100,000 per year.
- Characterized by bone marrow fibrosis, extramedullary hematopoiesis, and splenomegaly [3].
- Associated with **JAK2, CALR, or MPL mutations** [2].
**References:**
[1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, pp. 627-628.
[2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, p. 624.
[3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 614-615.
Hematology Indian Medical PG Question 2: A 69-year-old Caucasian man presents for a routine health maintenance examination. He feels well. He has no significant past medical history. He takes aspirin for the occasional headaches that he has had for over several years. He exercises every day and does not smoke. His father was diagnosed with a hematologic malignancy at 79 years old. The patient’s vital signs are within normal limits. Physical examination shows no abnormalities. The laboratory test results are as follows:
Hemoglobin 14.5 g/dL
Leukocyte count 62,000/mm3
Platelet count 350,000/mm3
A peripheral blood smear is obtained (shown on the image). Which of the following best explains these findings?
- A. Acute lymphoid leukemia
- B. Hairy cell leukemia
- C. Adult T cell leukemia
- D. Chronic lymphocytic leukemia (Correct Answer)
- E. Acute myeloid leukemia
Hematology Explanation: ***Chronic lymphocytic leukemia***
- The image displays characteristic **smudge cells** (also known as **basket cells**) and mature-looking lymphocytes with scant cytoplasm and condensed chromatin, which are hallmarks of CLL.
- The patient's age (69 years), elevated leukocyte count (62,000/mm³), and the presence of these particular cells on peripheral smear in an otherwise asymptomatic individual are all highly suggestive of CLL.
*Acute lymphoid leukemia*
- This condition is characterized by a proliferation of **blasts** (immature lymphocytes) in the bone marrow and peripheral blood, which are not depicted in the provided image.
- While it can present with a high leukocyte count, the cellular morphology would show a predominance of immature cells rather than the mature-appearing lymphocytes and smudge cells seen here.
*Hairy cell leukemia*
- This leukemia is characterized by lymphocytes with **fine cytoplasmic projections** (hairy cells) and typically leads to **pancytopenia**, particularly leukopenia, rather than the marked leukocytosis seen in this patient.
- The morphology in the image does not show these cytoplasmic projections.
*Adult T cell leukemia*
- This form of leukemia is caused by the **human T-lymphotropic virus type 1 (HTLV-1)** and is more prevalent in specific endemic regions (e.g., Japan, Caribbean).
- It usually presents with **atypical pleomorphic T-cells** with convoluted nuclei, often accompanied by skin lesions, hypercalcemia, and lymphadenopathy, none of which are mentioned or depicted.
*Acute myeloid leukemia*
- AML is characterized by an overgrowth of **myeloblasts** (immature myeloid cells) in the bone marrow and peripheral blood, often containing **Auer rods**.
- The cells in the image are clearly lymphoid in origin and do not show features of myeloblasts or Auer rods.
Hematology Indian Medical PG Question 3: Which parameter is primarily used to diagnose macrocytosis in a complete blood count (CBC)?
- A. Hematocrit
- B. Mean Corpuscular Hemoglobin Concentration (MCHC)
- C. Mean Corpuscular Volume (MCV) (Correct Answer)
- D. None of the options
Hematology Explanation: ***Mean Corpuscular Volume (MCV)***
- **MCV** measures the **average volume of red blood cells**, making it the primary indicator for classifying them as microcytic, normocytic, or macrocytic.
- An **elevated MCV** (typically above 100 fL) indicates **macrocytosis**, meaning the red blood cells are larger than normal.
*Mean Corpuscular Hemoglobin Concentration (MCHC)*
- **MCHC** reflects the **average concentration of hemoglobin** in red blood cells, primarily used to classify cells as normochromic or hypochromic.
- It does **not directly measure cell size** and therefore is not used to diagnose macrocytosis.
*Hematocrit*
- **Hematocrit** measures the **percentage of red blood cells** in a given volume of blood.
- While it indicates the overall red cell mass, it **does not provide information about the average size** of individual red blood cells.
*None of the options*
- As **MCV** is explicitly listed and is the correct parameter for diagnosing macrocytosis, this option is incorrect.
- The other parameters listed are important for other aspects of red blood cell analysis but not for classifying cell size.
Hematology Indian Medical PG Question 4: A 69-year-old woman, with poor dietary habits and alcoholism, is found to have a macrocytic anemia with hyper segmented neutrophils. Which of the following is the most appropriate diagnostic test?
- A. serum folate levels
- B. bone marrow
- C. RBC folate levels (Correct Answer)
- D. Schilling test
Hematology Explanation: RBC folate levels
- **RBC folate levels** reflect **tissue folate stores** and are less susceptible to daily dietary fluctuations than serum folate.
- This test is considered a more reliable indicator for diagnosing **chronic folate deficiency**, which is consistent with poor dietary habits and alcoholism.
*serum folate levels*
- **Serum folate levels** are easily influenced by recent dietary intake, making them less indicative of long-term folate stores [1].
- A normal serum folate level can be seen in patients with **tissue folate deficiency** if they have recently ingested folate-rich foods [1].
*bone marrow*
- A **bone marrow biopsy** might show megaloblastic changes, but it is an invasive procedure and is usually reserved for cases where the diagnosis remains unclear after less invasive tests [2].
- While it can confirm **megaloblastic anemia**, it does not specifically differentiate between **folate** and **B12 deficiencies** as the primary diagnostic tool.
*Schilling test*
- The **Schilling test** is used to diagnose **vitamin B12 malabsorption** (pernicious anemia or other causes), not folate deficiency.
- This patient's clinical picture points more towards a **folate deficiency** given the poor dietary habits and alcoholism, although B12 deficiency can also cause macrocytic anemia [3].
Hematology Indian Medical PG Question 5: Radiotherapy has the most significant therapeutic role in:
- A. Monoclonal gammopathy
- B. Tuberculosis
- C. Sarcomas (Correct Answer)
- D. Sarcoidosis
Hematology Explanation: ***Sarcomas***
- **Radiotherapy** plays a crucial therapeutic role in **sarcomas**, though typically as **adjuvant therapy** combined with surgical resection
- Used for **local control** in soft tissue sarcomas, particularly when wide margins cannot be achieved
- **Primary radiotherapy** is the treatment of choice for certain radiation-sensitive sarcomas like **Ewing's sarcoma** and in cases of **inoperable tumors**
- Essential for reducing **local recurrence rates** in high-grade soft tissue sarcomas
- Among the options listed, sarcomas have the **strongest and most established indication** for radiotherapy
*Monoclonal gammopathy*
- Generally **observation only** for MGUS (Monoclonal Gammopathy of Undetermined Significance)
- Radiotherapy used only for **solitary plasmacytoma**, which is a specific localized manifestation
- Multiple myeloma (if it progresses) is treated with **chemotherapy** and targeted agents, not radiotherapy as primary treatment
*Tuberculosis*
- An **infectious disease** caused by *Mycobacterium tuberculosis*
- Treated exclusively with **anti-tubercular drug regimens** (RIPE: Rifampicin, Isoniazid, Pyrazinamide, Ethambutol)
- Radiotherapy has **no role** in treating infections
*Sarcoidosis*
- A **systemic inflammatory condition** with non-caseating granulomas
- Primary treatment is **corticosteroids** for symptomatic cases
- Immunosuppressants used for refractory cases
- Radiotherapy has **no role** in inflammatory/granulomatous diseases
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