Hematology Practice Questions

Q: The MOST severe complication of idiopathic hyper-eosinophilic syndrome is:

Endocardial fibrosis. **Explanation:** **Idiopathic Hypereosinophilic Syndrome (HES)** is characterized by a persistent absolute eosinophil count >1500/µL for more than 6 months, leading to multi-organ damage. **Why Endocardial Fibrosis is Correct:** The most severe and life-threatening complication of HES is cardiac involvement, specifically **Loeffler’s Endocarditis**. Eosinophils release toxic granules (Major Basic Protein and Eosinophil Peroxidase) that cause direct endomyocardial damage. This progresses through three stages: 1. **Acute Necrotic Stage:** Myocardial damage. 2. **Thrombotic Stage:** Formation of mural thrombi. 3. **Fibrotic Stage:** Development of **Endocardial Fibrosis**, leading to restrictive cardiomyopathy and congestive heart failure. This is the primary cause of morbidity and mortality in these patients. **Why Other Options are Incorrect:** * **B. Eosinophilic gastroenteritis:** While the GI tract is frequently involved (causing diarrhea or pain), it is rarely fatal compared to cardiac failure. * **C. Interstitial pneumonia:** Pulmonary involvement (Loeffler’s syndrome/infiltrates) is common but usually responds well to steroids and is less severe than permanent cardiac remodeling. * **D. Bone marrow failure:** HES is a proliferative disorder, not an aplastic one. While it can evolve into myeloid leukemia, marrow failure is not a characteristic complication. **NEET-PG High-Yield Pearls:** * **Target Organ Damage:** Heart > Lungs > Skin > CNS. * **Cardiac Hallmark:** Restrictive cardiomyopathy with apical obliteration on Echo. * **Treatment:** Corticosteroids are the first-line treatment; Imatinib is used in cases with the *FIP1L1-PDGFRA* fusion gene.

Q: A 47-year-old man presents with a 6-week history of increasing fatigue and dark-colored stools. Complete blood count shows hemoglobin of 8.6 g/dL and microcytic, hypochromic RBCs. Upper gastrointestinal endoscopy reveals a peptic ulcer along the lesser curvature of the stomach. This patient's anemia is most likely caused by deficiency of which of the following?

Iron. **Explanation:** The patient presents with classic features of **Iron Deficiency Anemia (IDA)** secondary to chronic gastrointestinal blood loss [1]. **1. Why Iron is correct:** The clinical triad of **fatigue** (anemic symptom), **dark-colored stools** (melena indicating upper GI bleed), and a confirmed **peptic ulcer** points toward chronic blood loss [3]. In adults, the most common cause of iron deficiency is occult GI bleeding [1]. Laboratory findings of **microcytic, hypochromic RBCs** (low MCV, low MCHC) are the hallmark of IDA [2], as iron is a critical component of heme synthesis. Without iron, hemoglobin production is impaired, leading to smaller, paler red cells [1]. **2. Why the other options are incorrect:** * **Folic acid & Vitamin B12:** Deficiency of these vitamins leads to **Megaloblastic Anemia**, characterized by **macrocytic** (high MCV) RBCs and hypersegmented neutrophils, not microcytic cells [4]. * **Thiamine (Vitamin B1):** Thiamine deficiency typically presents as Beriberi (cardiovascular or neurological symptoms) or Wernicke-Korsakoff syndrome; it does not cause microcytic anemia. **Clinical Pearls for NEET-PG:** * **Rule of Thumb:** In any adult male or post-menopausal female with iron deficiency anemia, **GI malignancy** or **peptic ulcer disease** must be ruled out via endoscopy/colonoscopy [1]. * **Mentzer Index:** (MCV/RBC count) 13** suggests Iron Deficiency Anemia. * **Earliest Marker:** A decrease in **Serum Ferritin** is the earliest laboratory sign of iron deficiency. * **Pica and Koilonychia** (spoon-shaped nails) are specific physical exam findings associated with chronic IDA.

Q: What is the standard regimen used in the treatment of non-Hodgkin's Lymphoma?

CHOP. **Explanation:** The standard first-line chemotherapy regimen for **Non-Hodgkin’s Lymphoma (NHL)**, particularly Diffuse Large B-Cell Lymphoma (DLBCL), is **CHOP**. In modern practice, this is often combined with Rituximab (R-CHOP). **Breakdown of CHOP:** * **C:** Cyclophosphamide (Alkylating agent) * **H:** Hydroxydaunorubicin/Doxorubicin (Antitumor antibiotic/Anthracycline) * **O:** Oncovin/Vincristine (Vinca alkaloid) * **P:** Prednisolone (Glucocorticoid) **Analysis of Incorrect Options:** * **MOPP (Mechlorethamine, Oncovin, Procarbazine, Prednisolone):** This was the historical gold standard for **Hodgkin’s Lymphoma (HL)** but has been largely replaced due to high toxicity (infertility and secondary leukemias). * **ABVD (Adriamycin, Bleomycin, Vinblastine, Dacarbazine):** This is the current **standard of care for Hodgkin’s Lymphoma**. It is preferred over MOPP because it is less gonadotoxic and less leukemogenic. * **COPP (Cyclophosphamide, Oncovin, Procarbazine, Prednisolone):** Used occasionally in HL as a substitute for MOPP, but not the standard for NHL. **High-Yield Clinical Pearls for NEET-PG:** 1. **Doxorubicin Toxicity:** Monitor for **dilated cardiomyopathy** (cumulative dose-dependent). Dexrazoxane can be used as a cardioprotectant. 2. **Vincristine Toxicity:** Look for **peripheral neuropathy** (foot drop/paresthesia) and paralytic ileus. It is "M-phase" specific and notably **bone marrow sparing**. 3. **Cyclophosphamide Toxicity:** Characterized by **hemorrhagic cystitis** due to the metabolite **Acrolein**. This is prevented by aggressive hydration and **MESNA**. 4. **Rituximab:** A monoclonal antibody against **CD20**, frequently added to CHOP for B-cell NHL.

Q: Decreased RBC production is seen in which of the following conditions?

Renal failure. The correct answer is **Renal failure**. The primary mechanism behind decreased RBC production in chronic kidney disease (CKD) is the deficiency of **Erythropoietin (EPO)** [1]. EPO is a glycoprotein hormone produced by the peritubular interstitial cells of the renal cortex in response to hypoxia [1]. In renal failure, the loss of functional renal parenchyma leads to inadequate EPO production, resulting in a normocytic, normochromic anemia [1]. **Analysis of Options:** * **A. Intramuscular folate administration:** This would actually **increase** RBC production. Folate is essential for DNA synthesis; administering it to a deficient patient corrects megaloblastic maturation and stimulates erythropoiesis. * **C. Post gastrectomy:** This typically leads to anemia due to **increased loss or malabsorption** (Vitamin B12 deficiency due to loss of intrinsic factor and Iron deficiency due to loss of gastric acid) [2]. While it affects production eventually, it is classified primarily as a nutritional deficiency/malabsorption state rather than a primary failure of the bone marrow's production signal. * **D. Prosthetic valve hemolysis:** This is a classic example of **increased RBC destruction** (extravascular/mechanical hemolysis). The bone marrow is actually hyperactive in this condition, trying to compensate by increasing RBC production (reticulocytosis). **NEET-PG High-Yield Pearls:** * **Anemia of CKD:** Usually develops when GFR falls below **30-45 mL/min**. * **Target Hemoglobin:** When treating CKD patients with recombinant EPO, the target Hb is generally **10–11.5 g/dL**. Exceeding 13 g/dL increases the risk of cardiovascular events and thrombosis [1]. * **Echistocytes:** Always look for fragmented RBCs (schistocytes) on a peripheral smear in cases of prosthetic valve hemolysis (Microangiopathic Hemolytic Anemia).

Q: What is the leading cause of death in Chronic Lymphocytic Leukemia (CLL)?

Infections. **Explanation:** **1. Why Infections are the Leading Cause of Death:** In Chronic Lymphocytic Leukemia (CLL), the primary cause of mortality (responsible for 50-60% of deaths) is **infection** [1]. This susceptibility arises from a profound state of immune dysregulation characterized by: * **Hypogammaglobulinemia:** Progressive decline in serum immunoglobulin levels (IgG, IgA, and IgM) due to the suppression of normal B-cell function [1]. * **T-cell Dysfunction:** Impaired cell-mediated immunity, increasing the risk of viral (e.g., Herpes Zoster) and opportunistic infections. * **Neutropenia:** Often a result of advanced bone marrow infiltration or chemotherapy (e.g., Fludarabine). Common sites include the respiratory tract (pneumonia) and skin. **2. Why Other Options are Incorrect:** * **B. Bleeding:** While thrombocytopenia can occur due to marrow replacement or ITP (Evans Syndrome), it is a less frequent cause of death compared to sepsis [1]. * **C. Meningeal extension:** Central Nervous System (CNS) involvement is extremely rare in CLL. This is more characteristic of Acute Lymphoblastic Leukemia (ALL) or high-grade lymphomas. * **D. DIC:** Disseminated Intravascular Coagulation is a classic complication of **Acute Promyelocytic Leukemia (APL - M3)**, not CLL. **3. High-Yield Clinical Pearls for NEET-PG:** * **Richter’s Transformation:** In 3-10% of cases, CLL transforms into an aggressive **Diffuse Large B-Cell Lymphoma (DLBCL)**, marked by sudden clinical deterioration and rising LDH. * **Autoimmune Complications:** CLL is associated with **Autoimmune Hemolytic Anemia (AIHA)** and ITP [1]. * **Smudge Cells:** A classic peripheral smear finding (crushed lymphocytes). * **Staging:** Remember the **Rai** (USA) and **Binet** (Europe) staging systems for exam questions.

Q: A 17-year-old girl with mild von Willebrand disease is scheduled for dental extraction. She has a previous history of bleeding during surgery. What medication can be given prophylactically to prevent bleeding?

Desmopressin. ### Explanation **Correct Answer: C. Desmopressin (DDAVP)** **Mechanism and Rationale:** Desmopressin (DDAVP) is the treatment of choice for patients with **Type 1 von Willebrand Disease (vWD)**, which accounts for approximately 80% of cases. It is a synthetic analogue of vasopressin that stimulates the release of endogenous **vWF and Factor VIII** from the Weibel-Palade bodies of endothelial cells. In minor surgical procedures like dental extractions, a single dose of DDAVP (intravenous or intranasal) can transiently increase vWF levels 3 to 5-fold, providing adequate hemostasis without the need for blood products. **Analysis of Incorrect Options:** * **A. Cryoprecipitate:** While it contains vWF and Factor VIII, it is no longer recommended due to the risk of transfusion-transmitted infections (TTIs). It is reserved only for life-threatening emergencies where specific concentrates are unavailable. * **B. Fresh Frozen Plasma (FFP):** FFP contains low concentrations of vWF and requires large volumes to achieve therapeutic levels, risking fluid overload. It is not a first-line treatment for vWD. * **D. High-purity Factor VIII concentrates:** These are used in Hemophilia A but are **ineffective** in vWD because the purification process removes vWF. If factor replacement is needed (e.g., in Type 3 vWD or major surgery), **Intermediate-purity Factor VIII concentrates** (which contain vWF) or recombinant vWF should be used. **NEET-PG High-Yield Pearls:** * **vWD Type 1:** Quantitative deficiency (Most common). * **vWD Type 2:** Qualitative defect. * **vWD Type 3:** Severe, total deficiency (Autosomal Recessive). * **DDAVP Side Effect:** Hyponatremia (due to water retention); patients should be advised to restrict fluid intake for 24 hours post-administration. * **Diagnostic Clue:** Prolonged Bleeding Time (BT) and potentially prolonged aPTT, with a normal Platelet Count.

Question 1

What is an evidence that splenectomy might benefit a patient with idiopathic thrombocytopenic purpura?

Accepted Answer

An increase in platelet count on corticosteroid therapy

Answer

A significant enlargement of the spleen

Answer

A high reticulocyte count

Answer

Patient's age less than five years

Question 2

The MOST severe complication of idiopathic hyper-eosinophilic syndrome is:

Accepted Answer

Endocardial fibrosis

Answer

Eosinophilic gastroenteritis

Answer

Interstitial pneumonia

Answer

Bone marrow failure

Question 3

A 47-year-old man presents with a 6-week history of increasing fatigue and dark-colored stools. Complete blood count shows hemoglobin of 8.6 g/dL and microcytic, hypochromic RBCs. Upper gastrointestinal endoscopy reveals a peptic ulcer along the lesser curvature of the stomach. This patient's anemia is most likely caused by deficiency of which of the following?

Accepted Answer

Iron

Answer

Folic acid

Answer

Thiamine

Answer

Vitamin B12

Question 4

Which of the following statements regarding hematological malignancies is true?

Accepted Answer

Acute lymphoid leukemia in infants less than 1 year of age has a poor prognosis.

Answer

Chronic myeloid leukemia characteristically occurs in individuals over 50 years of age.

Answer

Hairy cell leukemia in individuals less than 50 years of age generally has a good prognosis.

Answer

Chronic lymphocytic leukemia characteristically occurs in individuals less than 50 years of age.

Question 5

What is the standard regimen used in the treatment of non-Hodgkin's Lymphoma?

Accepted Answer

CHOP

Answer

COPP

Answer

MOPP

Answer

ABVD

Question 6

Decreased RBC production is seen in which of the following conditions?

Accepted Answer

Renal failure

Answer

Intramuscular folate administration

Answer

Post gastrectomy

Answer

Prosthetic valve hemolysis

Question 7

What is the leading cause of death in Chronic Lymphocytic Leukemia (CLL)?

Accepted Answer

Infections

Answer

Bleeding

Answer

Meningeal and ventricular extension

Answer

Disseminated Intravascular Coagulation (DIC)

Question 8

A seven-year-old girl presents with repeated episodes of bleeding into joints. On investigation, her APTT was found to be prolonged and PT was normal. Which of the following is the most likely diagnosis?

Accepted Answer

Von Willebrand Disease

Answer

Factor VII deficiency

Answer

Factor VIII deficiency

Answer

Factor XII deficiency

Question 9

What concentration of methemoglobin appears as cyanosis?

Accepted Answer

1.5 gm/dL

Answer

5 gm/dL

Answer

2 gm/dL

Answer

12 gm/dL

Question 10

A 17-year-old girl with mild von Willebrand disease is scheduled for dental extraction. She has a previous history of bleeding during surgery. What medication can be given prophylactically to prevent bleeding?

Accepted Answer

Desmopressin

Answer

Cryoprecipitate

Answer

Fresh Frozen Plasma (FFP)

Answer

High-purity Factor VIII concentrates

Hematology — MCQs

Hematology — MCQs

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