Hematopathology Practice Questions

Q: Which of the following is NOT a component of cryoprecipitate?

Factor V. Cryoprecipitate is the cold-insoluble fraction of plasma obtained by thawing Fresh Frozen Plasma (FFP) at 1–6°C. It is a concentrated source of specific clotting factors, and remembering its components is high-yield for NEET-PG. [2, 4] **Why Factor V is the correct answer:** Factor V is a **labile clotting factor** found in Fresh Frozen Plasma (FFP) but is **not** concentrated in cryoprecipitate. Cryoprecipitate specifically contains five main components: Factor VIII, Von Willebrand Factor (vWF), Fibrinogen (Factor I), Factor XIII, and Fibronectin. **Analysis of Incorrect Options:** * **Factor I (Fibrinogen):** This is the most abundant component of cryoprecipitate (approx. 150–250 mg per unit). It is the primary reason cryoprecipitate is used in clinical practice (e.g., in DIC or massive hemorrhage). [2] * **Factor VIII:** Cryoprecipitate contains significant amounts of Factor VIII (anti-hemophilic factor), making it a historical treatment for Hemophilia A. * **Von Willebrand Factor (vWF):** Cryoprecipitate is rich in vWF, which is why it is used to treat von Willebrand disease when specific concentrates are unavailable. **High-Yield Clinical Pearls for NEET-PG:** 1. **Indications:** The most common indication for cryoprecipitate today is **hypofibrinogenemia** (target fibrinogen level >100 mg/dL). [2] 2. **Storage:** It is stored at **-18°C or colder** and has a shelf life of 1 year. Once thawed, it must be used within 4–6 hours. 3. **Dosage:** One unit of cryoprecipitate typically raises the fibrinogen level by 5–10 mg/dL in an average adult. 4. **Mnemonic:** To remember the contents, use **"1, 8, 13, vWF, and Fibronectin."** (Note: Factor V is notably absent).

Q: Prothrombin level estimation is useful in the following clotting factor deficiencies, except?

Factor IX. Explanation: The **Prothrombin Time (PT)** test measures the integrity of the **Extrinsic** and **Common pathways** of the coagulation cascade. To understand why Factor IX is the correct answer, one must look at the specific factors involved in these pathways: 1. **Extrinsic Pathway:** Factor VII. 2. **Common Pathway:** Factors X, V, II (Prothrombin), and I (Fibrinogen). **Factor IX** is a component of the **Intrinsic pathway** (along with Factors XII, XI, and VIII). Deficiencies in the intrinsic pathway are monitored using the **Activated Partial Thromboplastin Time (aPTT)**, not PT. Therefore, PT levels remain normal in Factor IX deficiency (Hemophilia B), making it the correct "except" choice. **Analysis of Incorrect Options:** * **Factor II (Prothrombin):** As a key component of the common pathway, its deficiency significantly prolongs PT. * **Factor V:** This is a cofactor in the common pathway (prothrombinase complex); its deficiency leads to an abnormal PT. * **Factor VII:** This is the primary factor of the extrinsic pathway. PT is specifically designed to be highly sensitive to Factor VII levels. **NEET-PG High-Yield Pearls:** * **PT/INR** is the most sensitive marker for **liver synthetic function** because Factor VII has the shortest half-life (approx. 6 hours). * **Vitamin K deficiency** affects Factors II, VII, IX, and X. While both PT and aPTT can be prolonged, **PT is affected first** due to the rapid decline of Factor VII. * **Warfarin** monitoring is done via PT/INR (Extrinsic), while **Heparin** monitoring is done via aPTT (Intrinsic).

Q: Which of the following is the only form of Hodgkin disease (HD) more common in women?

Nodular-sclerosing Hodgkin disease. **Explanation:** In Hodgkin Lymphoma (HL), there is a distinct gender distribution pattern. While the overall incidence of Hodgkin Lymphoma is higher in males, **Nodular Sclerosis Hodgkin Lymphoma (NSHL)** is the notable exception. It is the only subtype that shows a **female preponderance** (or an equal gender distribution depending on the study population) and is the most common subtype overall, accounting for approximately 60–80% of cases [1]. It typically affects adolescents and young adults and frequently presents with a mediastinal mass [2]. **Analysis of Options:** * **Nodular Sclerosis (Correct):** Characterized by broad bands of collagen fibrosis surrounding nodules of tumor cells and the presence of **Lacunar cells** (a variant of Reed-Sternberg cells). It is the most common subtype in females and young adults [1]. * **Lymphocyte-Predominant (Incorrect):** This subtype has a strong male predominance (approx. 3:1). It is characterized by "Popcorn cells" (L&H cells) and generally carries the best prognosis. * **Mixed-Cellularity (Incorrect):** More common in males and older patients. It is strongly associated with EBV infection and presents with a diverse inflammatory background. * **Lymphocyte-Depleted (Incorrect):** The rarest subtype, seen most often in elderly or HIV-positive males. It carries the worst prognosis. **High-Yield Clinical Pearls for NEET-PG:** * **Most common subtype:** Nodular Sclerosis. * **Best prognosis:** Lymphocyte-Predominant. * **Worst prognosis:** Lymphocyte-Depleted. * **EBV Association:** Highest in Mixed-Cellularity and Lymphocyte-Depleted subtypes. * **Bimodal Age Distribution:** HL peaks at 15–35 years and again after 50 years. * **Reed-Sternberg (RS) Cells:** The hallmark of HL; they are CD15+ and CD30+ (except in the Nodular Lymphocyte Predominant type, which is CD20+).

Q: Wrinkled paper appearance of macrophage in bone marrow aspirate is characteristic of which condition?

Gaucher disease. **Explanation** **Gaucher disease** is the correct answer because it is characterized by the accumulation of glucocerebroside within macrophages due to a deficiency of the enzyme **glucocerebrosidase** (β-glucosidase). These lipid-laden macrophages are known as **Gaucher cells**. Under light microscopy, the cytoplasm of these cells has a classic **"wrinkled paper"** or **"crumpled silk"** appearance [1]. This unique morphology is caused by the intralysosomal accumulation of tubular bimolecular leaflets of glucocerebroside [1]. **Analysis of Incorrect Options:** * **A. Niemann-Pick disease:** This condition involves a deficiency of sphingomyelinase. The characteristic cells are **"foamy macrophages"** (vacuolated cytoplasm) rather than wrinkled ones [2]. * **C. Hemophagocytic lymphohistiocytosis (HLH):** This is characterized by activated macrophages engulfing erythrocytes, leukocytes, and platelets (**hemophagocytosis**), not lipid accumulation. * **D. Langerhans cell histiocytosis:** This features Birbeck granules (tennis-racket shaped) on electron microscopy and cells with grooved, **"coffee-bean"** nuclei, not wrinkled cytoplasm. **High-Yield Clinical Pearls for NEET-PG:** * **Gaucher Disease** is the most common lysosomal storage disorder. * **Biomarker:** Serum **ACE levels** and **TRAP** (Tartrate-resistant acid phosphatase) are often elevated. * **Clinical Triad:** Hepatosplenomegaly, bone involvement (Erlenmeyer flask deformity of the femur), and pancytopenia [1]. * **Pseudo-Gaucher cells:** These can be seen in conditions with high cell turnover, such as **Chronic Myeloid Leukemia (CML)** and Multiple Myeloma. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Genetic Disorders, pp. 162-163. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Genetic Disorders, pp. 161-162.

Q: A patient with anemia presents with peripheral blood smear showing features suggestive of thalassemia. Family history is positive. Which investigation is most appropriate to establish the diagnosis?

Hemoglobin (Hb) electrophoresis. **Explanation:** The clinical presentation of anemia, a positive family history, and a peripheral smear showing microcytic hypochromic cells with target cells strongly suggests a **Thalassemia syndrome**. **1. Why Hemoglobin (Hb) Electrophoresis is correct:** Hb electrophoresis is the **gold standard diagnostic test** for thalassemia. It works by separating different hemoglobin fractions (HbA, HbA2, and HbF) based on their electrical charge. * In **Beta-thalassemia trait**, there is a characteristic elevation of **HbA2 (>3.5%)** and sometimes HbF. [1] * In **Beta-thalassemia major**, HbA is nearly absent, replaced predominantly by HbF. * High-Performance Liquid Chromatography (HPLC) is an even more modern, automated alternative often used in clinical practice. **2. Why other options are incorrect:** * **ESR estimation:** This is a non-specific marker of inflammation and has no diagnostic value in hemoglobinopathies. * **Blood spherocyte estimation:** Spherocytes are characteristic of Hereditary Spherocytosis or Autoimmune Hemolytic Anemia, not Thalassemia (which shows target cells and leptocytes). [2] * **Bone marrow aspiration:** While it would show erythroid hyperplasia, it is an invasive procedure and cannot differentiate between various causes of microcytic anemia or confirm a genetic hemoglobin defect. [1] **Clinical Pearls for NEET-PG:** * **Mentzer Index:** (MCV/RBC count) 13 suggests Iron Deficiency Anemia. * **Peripheral Smear:** Look for "Target cells" (Codocytes) and "Basophilic stippling." [1] * **Confirmatory Test:** While electrophoresis is diagnostic for Beta-thalassemia, **Genetic testing (PCR)** is required to definitively diagnose Alpha-thalassemia.

Question 1

Purpura fulminans is seen in which of the following conditions?

Accepted Answer

Severe DIC

Answer

Leukocytoclastic vasculitis

Answer

Viral hemorrhagic fever

Answer

Tularemia

Question 2

Which of the following is NOT a component of cryoprecipitate?

Accepted Answer

Factor V

Answer

Von Willebrand factor

Answer

Factor I

Answer

Factor VIII

Question 3

Glucose added to stored blood is beneficial for which of the following reasons?

Accepted Answer

To prevent hemolysis

Answer

To provide nutrition for one week

Answer

To increase blood acidosis

Answer

To prevent hyperkalemia

Question 4

Prothrombin level estimation is useful in the following clotting factor deficiencies, except?

Accepted Answer

Factor IX

Answer

Factor II

Answer

Factor V

Answer

Factor VII

Question 5

Which of the following is NOT typically seen in sickle cell disease?

Accepted Answer

Moderate to massive splenomegaly

Answer

Gamma Gandy bodies

Answer

Fish mouth vertebra

Answer

Decreased ESR

Question 6

Which of the following is the only form of Hodgkin disease (HD) more common in women?

Accepted Answer

Nodular-sclerosing Hodgkin disease

Answer

Lymphocyte-predominant Hodgkin disease

Answer

Mixed-cellularity Hodgkin disease

Answer

Lymphocyte-depleted Hodgkin disease, reticular type

Question 7

In hemolytic anemias, what happens to the urobilinogen level in the blood?

Accepted Answer

Increase

Answer

Be absent

Answer

Decrease

Answer

Mildly decrease

Question 8

Hereditary spherocytosis is due to deficiency of which protein?

Accepted Answer

Ankyrin

Answer

Actin

Answer

Selectin

Answer

Integrin

Question 9

Wrinkled paper appearance of macrophage in bone marrow aspirate is characteristic of which condition?

Accepted Answer

Gaucher disease

Answer

Niemann-Pick disease

Answer

Hemophagocytic lymphohistiocytosis

Answer

Langerhans cell histiocytosis

Question 10

A patient with anemia presents with peripheral blood smear showing features suggestive of thalassemia. Family history is positive. Which investigation is most appropriate to establish the diagnosis?

Accepted Answer

Hemoglobin (Hb) electrophoresis

Answer

Erythrocyte Sedimentation Rate (ESR) estimation

Answer

Blood spherocyte estimation

Answer

Bone marrow aspiration

Hematopathology — MCQs

Hematopathology — MCQs

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