Hematology Practice Questions

Q: A patient presents with increased serum ferritin, decreased TIBC, increased serum iron, and increased % saturation. What is the most probable diagnosis?

Sideroblastic anemia. ### Explanation The correct answer is **Sideroblastic Anemia**. This condition is characterized by a defect in heme synthesis, leading to the accumulation of iron within the mitochondria of erythroid precursors (forming ringed sideroblasts). Because iron cannot be incorporated into hemoglobin, it leaks out of the cells, leading to **iron overload**. #### Why Sideroblastic Anemia is Correct: In Sideroblastic anemia, the body has an abundance of iron that it cannot utilize. This results in: * **Increased Serum Iron & % Saturation:** Iron is not being used for heme synthesis. * **Increased Ferritin:** Reflects high systemic iron stores. * **Decreased TIBC:** A compensatory response to high iron levels (the liver produces less transferrin when iron is plentiful). #### Why Other Options are Incorrect: * **Iron Deficiency Anemia (IDA):** This is the polar opposite. You would see **decreased** ferritin, **decreased** serum iron, and **increased** TIBC (the body’s attempt to "catch" more iron) [2]. * **Anemia of Chronic Disease (ACD):** While ferritin is increased (as an acute phase reactant), the hallmark is **decreased serum iron** and **decreased TIBC** because iron is "trapped" inside macrophages and unavailable for circulation [1]. * **Thalassemia Minor:** Usually presents with a normal iron profile. It is a defect in globin chain synthesis, not iron metabolism. #### NEET-PG High-Yield Pearls: * **Gold Standard Diagnosis:** Bone marrow aspiration showing **Ringed Sideroblasts** (Prussian Blue stain). * **Common Causes:** Alcohol (most common), Lead poisoning, Isoniazid (B6 deficiency), and X-linked ALAS2 mutation. * **Treatment:** Pyridoxine (Vitamin B6) is the first-line treatment for sideroblastic anemia, as it is a cofactor for the ALAS enzyme.

Q: Which of the following is NOT a cause of microcytic hypochromic anemia?

Sickle cell disease. Microcytic hypochromic anemia is characterized by a Mean Corpuscular Volume (MCV) < 80 fL and a Mean Corpuscular Hemoglobin Concentration (MCHC) < 32 g/dL. This occurs due to defects in hemoglobin synthesis (heme or globin). **Why Sickle Cell Disease is the correct answer:** Sickle cell disease (SCD) is a qualitative hemoglobinopathy [1] (substitution of valine for glutamic acid) [2]. It typically presents as a **Normocytic Normochromic Anemia** with a high reticulocyte count due to its hemolytic nature. While chronic hemolysis can lead to secondary iron deficiency (microcytosis), the primary disease process itself is normocytic. **Analysis of other options:** * **Iron Deficiency Anemia (IDA):** The most common cause of microcytic hypochromic anemia worldwide due to defective heme synthesis [2]. * **Aplastic Anemia:** This is a bone marrow failure syndrome characterized by pancytopenia. It typically presents as **Normocytic** or occasionally **Macrocytic** anemia (due to stress erythropoiesis), but never microcytic. * **Hereditary Spherocytosis:** This is a red cell membrane defect. It typically presents as **Normocytic** anemia, but it is unique for having an **elevated MCHC** (hyperchromic appearance) due to membrane loss and cellular dehydration. *(Note: The question as provided contains a technical discrepancy. Both A, B, and D are typically NOT microcytic. However, in the context of NEET-PG, if forced to choose the "most" correct among non-microcytic options, SCD is often grouped with hemolytic anemias which are normocytic.)* **NEET-PG High-Yield Pearls:** * **Mnemonic for Microcytic Anemia (TAILS):** **T**halassemia, **A**nemia of chronic disease (late), **I**ron deficiency, **L**ead poisoning, **S**ideroblastic anemia. * **Mentzer Index (MCV/RBC):** 13 suggests Iron Deficiency Anemia. * **Hereditary Spherocytosis:** Look for increased MCHC and a positive Osmotic Fragility Test.

Q: Which of the following is associated with Chronic Lymphocytic Leukemia (CLL)?

All of the above. Chronic Lymphocytic Leukemia (CLL) is the most common leukemia in the Western world, characterized by the monoclonal proliferation and accumulation of functionally incompetent, **mature B-lymphocytes**. 1. **Age (Option A):** CLL is primarily a disease of the elderly [1]. The median age at diagnosis is approximately 70 years, and it is rarely seen in individuals under 40. Therefore, being over 50 years of age is a significant demographic association. 2. **Peripheral Smear (Option B):** The hallmark of CLL is an absolute lymphocytosis (>5,000/µL). On a blood film, these cells appear as **mature, small lymphocytes** with a narrow rim of cytoplasm and condensed "block-type" chromatin. A classic finding is the presence of **Smudge cells** (Basket cells), which are fragile lymphocytes ruptured during slide preparation. 3. **Clinical Features (Option C):** While many patients are asymptomatic at diagnosis (detected on routine CBC), progressive disease leads to painless **generalized lymphadenopathy** and **hepatosplenomegaly** due to infiltration by leukemic cells [1]. **Conclusion:** Since all three statements accurately describe the demographic, morphological, and clinical profile of CLL, **Option D** is the correct answer. **High-Yield Clinical Pearls for NEET-PG:** * **Immunophenotype:** Characteristically positive for **CD5** (a T-cell marker), CD19, CD20 (weak), and **CD23**. * **Richter Transformation:** The sudden transformation of CLL into an aggressive High-Grade B-cell Lymphoma (usually DLBCL). * **Complications:** Hypogammaglobulinemia (leading to recurrent infections) and Autoimmune Hemolytic Anemia (AIHA) [1]. * **Staging:** Uses the **Rai System** (USA) or **Binet Classification** (Europe) [1].

Q: What is the most common cause for complications of blood transfusion?

Human error. Explanation: 1. Why Human Error is the Correct Answer: Despite advancements in screening and cross-matching technology, human error remains the leading cause of transfusion-related complications and fatalities. This most commonly manifests as ABO incompatibility [1] due to clerical mistakes, such as mislabeling a sample, improper patient identification at the bedside, or administering the wrong unit to the wrong patient. Studies consistently show that technical failures are rare compared to procedural lapses in the "chain of transfusion." [1] 2. Why the Other Options are Incorrect: * Anaphylaxis: While serious, IgA-deficient patients experiencing anaphylaxis represent a very small percentage of transfusion reactions. * Graft-versus-host disease (GVHD): This is a rare, albeit fatal, complication occurring primarily in immunocompromised patients or when receiving blood from HLA-homozygous donors (e.g., directed donations from relatives). It is prevented by irradiation, not a common occurrence. * Presensitization: This leads to delayed hemolytic transfusion reactions or febrile non-hemolytic reactions due to prior exposure (pregnancy/transfusion). While frequent, these are statistically less common as a primary cause of major morbidity compared to errors in the administration process. 3. High-Yield Clinical Pearls for NEET-PG: * Most common overall reaction: Febrile Non-Hemolytic Transfusion Reaction (FNHTR) [1]. * Most common cause of transfusion-related death: Historically ABO incompatibility (human error), but in modern well-monitored settings, TRALI (Transfusion-Related Acute Lung Injury) is often cited as the leading cause of mortality. * Bedside Check: The final "clerical check" at the patient's bedside is the most critical step in preventing fatal hemolytic reactions [2]. * Bacterial Contamination: Most common with Platelets (stored at room temperature). [1] Davidson's Principles and Practice of Medicine, 22E, pp. 1033-1037.

Q: Pancytopenia with hypercellular marrow is due to all EXCEPT:

Dyskeratosis congenita. **Explanation:** The core concept of this question lies in differentiating between **"Ineffective Hematopoiesis"** (where the marrow is full of cells that fail to mature or enter circulation) and **"Aplastic/Hypoplastic Anemia"** (where the marrow is empty). **1. Why Dyskeratosis Congenita is the Correct Answer:** Dyskeratosis congenita is a congenital form of **Aplastic Anemia** caused by telomere biology disorders. It is characterized by a **hypocellular (empty) bone marrow**. Because the hematopoietic stem cells themselves are depleted, the marrow cannot be hypercellular. It classically presents with the triad of abnormal skin pigmentation, nail dystrophy, and oral leukoplakia. **2. Analysis of Incorrect Options (Causes of Hypercellular Marrow with Pancytopenia):** * **Myelodysplasia (MDS):** This is the classic example of "ineffective hematopoiesis." The marrow is hypercellular or normocellular, but the cells are dysplastic and undergo apoptosis before reaching the peripheral blood. * **Paroxysmal Nocturnal Hemoglobinuria (PNH):** While PNH can be associated with aplastic anemia, it frequently presents with a hypercellular marrow during hemolytic phases or when evolving from/into other myelodysplastic processes. * **Sarcoidosis:** This represents "marrow infiltration" (Myelophthisic anemia). Granulomas infiltrate the bone marrow, leading to a reactive hypercellularity of the non-involved marrow spaces or a "packed" appearance, despite low peripheral counts. **NEET-PG High-Yield Pearls:** * **Pancytopenia + Hypercellular Marrow:** Think Vitamin B12/Folate deficiency (Megaloblastic anemia), MDS, Aleukemic Leukemia, and Subleukemic Leukemia. * **Pancytopenia + Hypocellular Marrow:** Think Aplastic Anemia, Dyskeratosis Congenita, and Fanconi Anemia. * **MDS** is often called "Pre-leukemia" and is the most common cause of macrocytic pancytopenia in the elderly with a hypercellular marrow.

Q: A 30-year-old woman presents with fatigue, dark "tea color" urine, and yellowish eyes. Her past medical history includes myasthenia gravis treated with azathioprine and pyridostigmine. Laboratory findings are consistent with autoimmune hemolytic anemia. A chest X-ray shows an anterior mediastinal mass. What is the most likely diagnosis?

thymoma. **Explanation:** The clinical presentation describes a classic triad: **Myasthenia Gravis (MG)**, **Autoimmune Hemolytic Anemia (AIHA)**, and an **Anterior Mediastinal Mass**. This constellation is highly characteristic of a **Thymoma**. **1. Why Thymoma is correct:** Thymomas are epithelial tumors of the thymus gland. They are unique for their strong association with paraneoplastic autoimmune syndromes due to the failure of T-cell self-tolerance within the tumor. * **Myasthenia Gravis:** The most common association (seen in ~30-45% of thymoma patients). All patients with MG should have a thoracic CT to exclude thymoma [1]. * **Hematologic disorders:** While Pure Red Cell Aplasia (PRCA) is the most classic hematologic association, **AIHA** (causing the "tea-colored" urine/jaundice) and Hypogammaglobulinemia (Good Syndrome) are also well-documented. **2. Why incorrect options are wrong:** * **Nodular Sclerosing Hodgkin Disease:** While it is the most common mediastinal lymphoma in young women, it typically presents with B-symptoms (fever, weight loss) and lymphadenopathy, not paraneoplastic MG or AIHA. * **Small Cleaved Cell NHL:** Usually presents with disseminated lymphadenopathy in older adults; it is not specifically associated with MG. * **Teratoma:** A common germ cell tumor in the anterior mediastinum, but it is usually asymptomatic or causes local pressure symptoms. It does not trigger the T-cell dysregulation required to cause MG or AIHA. **Clinical Pearls for NEET-PG:** * **Anterior Mediastinal Mass (The 4 Ts):** **T**hymoma, **T**eratoma (Germ cell tumors), **T**errible Lymphoma, and **T**hyroid (Retrosternal goiter). * **Thymoma Associations:** MG (most common), PRCA (most specific hematologic), and Good Syndrome (hypogammaglobulinemia). * **Management:** Surgical resection (thymectomy) is the treatment of choice and may improve the associated autoimmune conditions [1].

Q: Which of the following is NOT a poor prognostic factor for Hodgkin's disease?

Younger age. In Hodgkin’s Lymphoma (HL), prognosis is determined by clinical stage, histological subtype, and specific laboratory parameters. **Explanation of the Correct Answer:** **A. Younger age:** This is a **favorable** prognostic factor. Epidemiologically, HL shows a bimodal age distribution. Younger patients (typically 45–50 years), who often present with more aggressive disease and poorer outcomes. **Explanation of Incorrect Options:** * **B. Systemic manifestations:** Also known as **"B-symptoms"** (fever >38°C, drenching night sweats, and weight loss >10% in 6 months) [1]. Their presence indicates a higher tumor burden and is a well-established poor prognostic indicator. * **C. Lymphocyte depletion:** This is the **least common** and **worst prognosis** histological subtype of HL. It is characterized by a high number of Reed-Sternberg cells and a lack of reactive lymphocytes, often seen in HIV-positive or elderly patients. * **D. Stomach involvement:** Extranodal involvement (Stage IV) significantly worsens the prognosis [1]. Involvement of the gastrointestinal tract, bone marrow, or liver indicates advanced disseminated disease. **NEET-PG High-Yield Pearls:** * **Best Prognosis Subtype:** Lymphocyte Predominant (often presents in early stages). * **Most Common Subtype:** Nodular Sclerosis (common in young females; associated with mediastinal mass). * **Hasford/International Prognostic Index (IPI) for HL (Advanced Stage):** Poor factors include Age ≥45, Male sex, Stage IV, Albumin <4 g/dL, Hemoglobin <10.5 g/dL, WBC ≥15,000/µL, and Lymphocytes <600/µL (or <8%). * **Staging System:** Ann Arbor Staging (modified by Cotswolds) [1].

Question 1

A patient presents with increased serum ferritin, decreased TIBC, increased serum iron, and increased % saturation. What is the most probable diagnosis?

Accepted Answer

Sideroblastic anemia

Answer

Anemia of chronic disease

Answer

Iron deficiency anemia

Answer

Thalassemia minor

Question 2

Which of the following is NOT a cause of microcytic hypochromic anemia?

Accepted Answer

Sickle cell disease

Answer

Aplastic anemia

Answer

Iron deficiency anemia

Answer

Hereditary spherocytosis

Question 3

Which of the following is associated with Chronic Lymphocytic Leukemia (CLL)?

Accepted Answer

All of the above

Answer

Individuals over 50 years of age

Answer

Mature small lymphocytes in peripheral smear

Answer

Hepatosplenomegaly and lymphadenopathy

Question 4

A young person presents with a history of severe menorrhagia, palpable spleen, prolonged bleeding time, and normal clotting time and platelet count. What is the most likely diagnosis?

Accepted Answer

Thrombasthenia

Answer

Hemophilia

Answer

Henoch-Schonlein purpura

Answer

Allergic purpura

Question 5

Which of the following is characteristic of Chronic Myeloid Leukemia?

Accepted Answer

The fusion gene bcr-abl forms a protein with tyrosine kinase activity.

Answer

The ABL gene on chromosome 22 is translocated to the BCR gene on chromosome 9.

Answer

Splenomegaly is unusual.

Answer

Philadelphia chromosome positive patients respond poorly to Imatinib.

Question 6

What is the most common cause for complications of blood transfusion?

Accepted Answer

Human error

Answer

Anaphylaxis

Answer

Graft-versus-host disease (GVHD)

Answer

Presensitization

Question 7

Pancytopenia with hypercellular marrow is due to all EXCEPT:

Accepted Answer

Dyskeratosis congenita

Answer

Myelodysplasia

Answer

Paroxysmal nocturnal hemoglobinuria

Answer

Sarcoidosis

Question 8

A 30-year-old woman presents with fatigue, dark "tea color" urine, and yellowish eyes. Her past medical history includes myasthenia gravis treated with azathioprine and pyridostigmine. Laboratory findings are consistent with autoimmune hemolytic anemia. A chest X-ray shows an anterior mediastinal mass. What is the most likely diagnosis?

Accepted Answer

thymoma

Answer

nodular sclerosing Hodgkin disease

Answer

small cleaved cell non-Hodgkin lymphoma

Answer

teratoma

Question 9

Common findings in hemochromatosis include all of the following except?

Accepted Answer

Diabetes insipidus

Answer

Diabetes mellitus

Answer

Impotence

Answer

Hepatocellular carcinoma

Question 10

Which of the following is NOT a poor prognostic factor for Hodgkin's disease?

Accepted Answer

Younger age

Answer

Systemic manifestations

Answer

Lymphocyte depletion

Answer

Stomach involvement

Hematology — MCQs

Hematology — MCQs

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