Hematopathology Practice Questions

Q: All of the following conditions may be associated with pancytopenia and splenomegaly, except?

Aplastic Anemia. **Explanation:** The hallmark of **Aplastic Anemia** is pancytopenia resulting from bone marrow failure (hypocellular marrow). Because the pathology is a primary failure of production rather than peripheral destruction or infiltration, there is **no splenomegaly** [1]. In fact, the presence of a palpable spleen in a patient with pancytopenia should lead a clinician to look for diagnoses other than aplastic anemia. **Analysis of Options:** * **Hairy Cell Leukemia (B):** This is a classic cause of "massive splenomegaly" and pancytopenia. The pancytopenia occurs due to bone marrow infiltration and splenic sequestration. * **Myelofibrosis (C):** In the fibrotic stage, the marrow fails (pancytopenia), leading to compensatory **Extramedullary Hematopoiesis (EMH)**. This results in significant hepatosplenomegaly. * **Hypersplenism (D):** This is a functional state where an enlarged spleen (due to portal hypertension, storage disorders, etc.) excessively sequesters and destroys circulating blood cells, leading to pancytopenia [2]. **NEET-PG High-Yield Pearls:** 1. **Rule of Thumb:** If pancytopenia is present **without** splenomegaly, think Aplastic Anemia, PNH, or Vitamin B12 deficiency. 2. **Rule of Thumb:** If pancytopenia is present **with** splenomegaly, think Hairy Cell Leukemia, Myelofibrosis, Kala-azar, or Gaucher’s disease. 3. **Bone Marrow Finding:** In Aplastic Anemia, the marrow is replaced by fat cells ("Dry tap" is not common here; rather, a "fatty marrow" is seen on biopsy) [1]. 4. **Hairy Cell Leukemia** is uniquely associated with "Dry tap" on aspiration and TRAP (Tartrate-Resistant Acid Phosphatase) positivity. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, pp. 662-663. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 604-605.

Q: Birbeck’s granules in the cytoplasm are seen in:

Langerhans cells. **Explanation:** **Langerhans cells (Option A)** are specialized dendritic cells found primarily in the skin (stratum spinosum) and other squamous epithelia [1]. The pathognomonic ultrastructural feature of these cells is the **Birbeck granule** [1]. Under electron microscopy, these are rod-shaped, pentalaminar cytoplasmic organelles with a central striated line and a bulbous end, giving them a characteristic **"tennis racket" appearance** [1]. They contain the protein **langerin (CD207)**, which is involved in the endocytosis and degradation of viruses [1]. **Why other options are incorrect:** * **Mast cells (Option B):** These are characterized by dense, membrane-bound cytoplasmic granules containing histamine, heparin, and tryptase. They do not contain Birbeck granules. * **Myelocytes (Option C):** These are precursors in the granulocytic series. They contain primary (azurophilic) and secondary (specific) granules, but lack Birbeck granules. * **Thrombocytes (Option D):** Platelets contain alpha-granules (fibrinogen, vWF) and dense granules (ADP, ATP, serotonin, calcium), but no Birbeck granules. **High-Yield Clinical Pearls for NEET-PG:** * **Langerhans Cell Histiocytosis (LCH):** A group of disorders (e.g., Letterer-Siwe disease, Hand-Schüller-Christian disease) characterized by the proliferation of these cells [1]. * **Immunohistochemistry (IHC) Markers:** LCH cells are characteristically positive for **S-100**, **CD1a**, and **CD207 (Langerin)** [1]. * **Radiology:** Often presents with "punched-out" lytic bone lesions, especially in the skull. **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. 629-630.

Q: Which of the following statements regarding Fanconi anemia is incorrect?

It is an autosomal dominant disorder.. **Explanation** **1. Why Option A is the Correct (Incorrect Statement):** Fanconi Anemia (FA) is primarily an **autosomal recessive** disorder. While rare cases of X-linked inheritance (FANCB gene) exist, it is **not** an autosomal dominant condition. This is a common trap in NEET-PG; most inherited bone marrow failure syndromes are recessive. **2. Analysis of Other Options:** * **Option B & C:** FA is the most common cause of **inherited aplastic anemia** [1]. The defect leads to progressive bone marrow failure, which manifests as **pancytopenia** (reduction in RBCs, WBCs, and platelets). Bone marrow examination typically reveals hypocellularity with increased fat replacement [2]. * **Option D:** The fundamental pathogenesis involves mutations in the **FANC gene family**, which are responsible for the **DNA interstrand cross-link repair** pathway. This defect leads to genomic instability and hypersensitivity to DNA-damaging agents. **3. Clinical Pearls & High-Yield Facts for NEET-PG:** * **Physical Findings:** Look for "Thumb and Radius" defects (absent/hypoplastic), short stature, microcephaly, and **Café-au-lait spots**. * **Diagnostic Test:** The gold standard is the **Chromosomal Breakage Analysis** using Clastogenic agents like **Diepoxybutane (DEB)** or Mitomycin C. * **Malignancy Risk:** Patients have a significantly high risk of developing **AML** (Acute Myeloid Leukemia) and squamous cell carcinomas (head, neck, and anogenital). * **Treatment:** Hematopoietic stem cell transplant (HSCT) is the definitive treatment for hematologic manifestations. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 595-596. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, pp. 662-663.

Question 1

All of the following conditions may be associated with pancytopenia and splenomegaly, except?

Accepted Answer

Aplastic Anemia

Answer

Hairy Cell Leukemia

Answer

Myelofibrosis

Answer

Hypersplenism

Question 2

Which of the following are true about aplastic anemia?

Accepted Answer

Nucleated RBCs in peripheral blood

Answer

Splenomegaly

Answer

Reticulocytopenia

Answer

Thrombocytopenia and Neutropenia

Question 3

Howell-Jolly bodies are seen in which of the following conditions?

Accepted Answer

Hemolytic anemia

Answer

Iron deficiency anemia

Answer

Polycythemia vera

Answer

Multiple myeloma

Question 4

Which of the following statements regarding Chronic Myeloid Leukemia (CML) is true?

Accepted Answer

The size of splenomegaly is indicative of prognosis.

Answer

Phagocytic activity of white blood cells is reduced.

Answer

Sudan black stain is specific for myeloblasts.

Answer

All of the above.

Question 5

A 55-year-old man presents with recurrent epigastric pain. Upper GI endoscopy and gastric biopsy reveal a neoplastic, lymphocytic infiltrate invading glandular tissue. Giemsa staining is positive for Helicobacter pylori. Which of the following is the most likely diagnosis?

Accepted Answer

Marginal zone lymphoma

Answer

Burkitt lymphoma

Answer

Follicular lymphoma

Answer

Mantle cell lymphoma

Question 6

Which of the following is NOT a minor diagnostic criterion for multiple myeloma?

Accepted Answer

Plasmacytoma on biopsy

Answer

Lytic bone lesions

Answer

Plasmacytosis greater than 20%

Answer

Monoclonal globulin spike on serum electrophoresis of > 2.5 g/dl for IgG, >1.5 g/dl for IgA

Question 7

Both APTT and PT are prolonged in which of the following conditions?

Accepted Answer

Factor II deficiency

Answer

Factor XIII deficiency

Answer

Heparin administration

Answer

Thrombocytopenia

Question 8

Which is the most common lymphoma in adults?

Accepted Answer

Diffuse large B-cell lymphoma (DLBCL)

Answer

Adult T-cell leukemia/lymphoma (ATLL)

Answer

Hodgkin lymphoma

Answer

Follicular lymphoma

Question 9

Birbeck’s granules in the cytoplasm are seen in:

Accepted Answer

Langerhans cells

Answer

Mast cells

Answer

Myelocytes

Answer

Thrombocytes

Question 10

Which of the following statements regarding Fanconi anemia is incorrect?

Accepted Answer

It is an autosomal dominant disorder.

Answer

Bone marrow examination typically shows pancytopenia.

Answer

It commonly presents as aplastic anemia.

Answer

It results from a defect in DNA repair.

Hematopathology — MCQs

Hematopathology — MCQs

On this page

Practice by Chapter

Want unlimited practice?