Hematology Practice Questions

Q: What is the first-line treatment for the T315I mutation in Chronic Myeloid Leukemia (CML) management?

Ponatinib. **Explanation:** Chronic Myeloid Leukemia (CML) is characterized by the BCR-ABL1 fusion gene [2]. While first and second-generation Tyrosine Kinase Inhibitors (TKIs) are effective, resistance often develops due to mutations in the ABL kinase domain [1]. **1. Why Ponatinib is correct:** The **T315I mutation** (often called the "gatekeeper mutation") involves a substitution of threonine with isoleucine at position 315. This change creates a bulky side chain that sterically hinders the binding of most TKIs. **Ponatinib** is a third-generation TKI specifically designed with a carbon-carbon triple bond ethynyl linkage that bypasses this steric hindrance, making it the **first-line and only standard TKI effective against the T315I mutation.** **2. Why other options are incorrect:** * **Bosutinib (Option A):** A second-generation TKI. While effective against many mutations, it is ineffective against T315I. * **Tofacitinib (Option B):** This is a JAK inhibitor used in rheumatoid arthritis and ulcerative colitis; it has no role in BCR-ABL1 inhibition. * **Nilotinib (Option D):** A second-generation TKI. Like Imatinib and Dasatinib, it cannot bind to the ABL kinase domain when the T315I mutation is present [2]. **Clinical Pearls for NEET-PG:** * **Asciminib:** A newer "STAMP" inhibitor (Specifically Targeting the ABL Myristoyl Pocket) is also effective against T315I and is used in resistant cases. * **Side Effect Alert:** Ponatinib is associated with a high risk of **arterial occlusive events** (thrombosis) and hypertension; patients must be monitored for cardiovascular complications. * **Imatinib:** Still the first-line treatment for standard (non-mutated) chronic phase CML [2].

Q: What is the most common site of lymph node enlargement in Hodgkin's lymphoma?

Mediastinal. **Explanation:** In **Hodgkin’s Lymphoma (HL)**, the disease typically originates in a single node or chain of nodes and spreads predictably to anatomically contiguous groups. **Why Mediastinal is the Correct Answer:** While cervical lymphadenopathy is the most common *palpable* presentation (found in 60-80% of patients during physical examination), **mediastinal involvement** is the most common site of lymph node enlargement overall when considering both clinical and radiological findings. Approximately **60% to 80% of patients** with the Nodular Sclerosis subtype (the most common variant) present with a mediastinal mass. In modern clinical practice and imaging-based staging, the mediastinum is recognized as the most frequently involved site. **Analysis of Incorrect Options:** * **A. Cervical:** This is the most common site for *peripheral* or *palpable* lymphadenopathy. If the question specifically asks for the most common "palpable" site, cervical is the answer. However, in a general context, mediastinal involvement is more frequent. * **B. Axillary:** Involved in about 10-20% of cases; it is rarely the primary or most common site. * **C. Abdominal:** Para-aortic and splenic involvement occur but are less common than supradiaphragmatic sites (Cervical/Mediastinal). Abdominal involvement is more characteristic of Non-Hodgkin Lymphoma (NHL). **High-Yield Clinical Pearls for NEET-PG:** * **Bimodal Age Distribution:** HL peaks in the 20s and again after age 50. * **Reed-Sternberg (RS) Cells:** The diagnostic hallmark (classic "Owl’s eye" appearance). * **Nodular Sclerosis:** The most common histological subtype; frequently presents with a large mediastinal mass in young females. * **Spread:** HL spreads in a **contiguous** fashion (node to adjacent node), unlike NHL which is often disseminated. * **Alcohol-induced pain:** A rare but classic symptom where lymph nodes become painful after alcohol consumption.

Q: Neurological symptoms and premature graying of hair are associated with which of the following conditions?

Pernicious anemia. **Explanation:** The correct answer is **Pernicious Anemia (Option B)**. This condition is an autoimmune disorder characterized by the destruction of gastric parietal cells, leading to a deficiency of **Intrinsic Factor (IF)**. Since IF is essential for the absorption of Vitamin B12 in the terminal ileum, its absence results in Vitamin B12 deficiency [1]. **Why Pernicious Anemia is correct:** 1. **Neurological Symptoms:** Vitamin B12 is crucial for myelin synthesis. Deficiency leads to **Subacute Combined Degeneration (SCD)** of the spinal cord, involving the posterior and lateral columns. Symptoms include loss of vibration/position sense, paresthesia, and ataxia. 2. **Premature Graying of Hair:** Vitamin B12 deficiency is a well-documented cause of reversible premature graying (canities) and skin hyperpigmentation. **Analysis of Incorrect Options:** * **Option A (Folic acid deficiency):** While it causes megaloblastic anemia similar to B12 deficiency, it **does not** cause neurological symptoms or premature graying. * **Options C & D (Plummer-Vinson / Paterson-Kelly syndrome):** These are synonyms for the same condition characterized by the triad of **Iron Deficiency Anemia, esophageal webs, and dysphagia**. It is associated with glossitis and koilonychia, but not neurological deficits or graying hair. **High-Yield Clinical Pearls for NEET-PG:** * **Schilling Test:** Historically used to diagnose Pernicious Anemia (now largely replaced by Anti-Intrinsic Factor and Anti-Parietal cell antibody titers). * **MCV:** Typically >100 fL (Megaloblastic). * **Peripheral Smear:** Shows hypersegmented neutrophils (earliest sign) and macro-ovalocytes. * **Metabolic Markers:** Both **Methylmalonic acid (MMA)** and **Homocysteine** levels are elevated in B12 deficiency (only Homocysteine is elevated in Folate deficiency).

Q: A 23-year-old man presents with prolonged nosebleeds. He has always noted easy bruising and ongoing bleeding after minor cuts. There is no prior history of surgery or dental procedures. His hemoglobin is 14.5 g/dL, platelets are 200,000/mL, and PT/PTT are normal. Further testing reveals that the bleeding time is elevated; the Factor VIII level is reduced, as is the ristocetin cofactor assay. What is the most likely diagnosis for this patient with a bleeding disorder?

von Willebrand's disease. ### Explanation **Correct Answer: A. von Willebrand's disease (vWD)** The patient presents with a classic **mucocutaneous bleeding pattern** (epistaxis, easy bruising, prolonged bleeding from minor cuts) [1]. The key to the diagnosis lies in the laboratory profile: 1. **Normal Platelet Count:** Rules out thrombocytopenia. 2. **Elevated Bleeding Time:** Indicates a defect in primary hemostasis (platelet adhesion) [2]. 3. **Reduced Ristocetin Cofactor Assay:** This is the most specific test for vWD; it measures the ability of von Willebrand Factor (vWF) to agglutinate platelets [1]. 4. **Reduced Factor VIII:** vWF acts as a carrier protein for Factor VIII, protecting it from degradation [1]. Therefore, a deficiency in vWF often leads to a secondary decrease in Factor VIII. **Why Incorrect Options are Wrong:** * **B & C (Hemophilia A & B):** These are disorders of secondary hemostasis (clotting factors). They typically present with deep-tissue bleeding (hemarthrosis, muscle hematomas) rather than mucosal bleeding [1]. In Hemophilia, the Bleeding Time is **normal**, but the **aPTT is prolonged**. * **D (TTP):** TTP is characterized by the pentad of microangiopathic hemolytic anemia, **thrombocytopenia** (which is absent here), neurological symptoms, fever, and renal failure. **High-Yield Clinical Pearls for NEET-PG:** * **Inheritance:** vWD is the most common inherited bleeding disorder (usually Autosomal Dominant). * **vWF Functions:** 1) Platelet-to-subendothelial adhesion (via GpIb receptor); 2) Carrier for Factor VIII [1]. * **Lab Findings:** Normal PT, Normal/Prolonged aPTT (depending on Factor VIII levels), and prolonged Bleeding Time/PFA-100. * **Treatment:** **Desmopressin (DDAVP)** is the drug of choice for Type 1 vWD as it releases stored vWF from Weibel-Palade bodies in endothelial cells [1].

Q: If a blood transfusion reaction develops due to incompatibility, what is the first immediate action to be taken?

Stop the transfusion. ### Explanation **1. Why "Stop the Transfusion" is Correct:** The most critical step in managing any suspected transfusion reaction—whether it is a simple febrile reaction or a life-threatening acute hemolytic reaction—is to **immediately stop the transfusion** [1]. This prevents further exposure to the offending antigen or antibody, limiting the severity of the immune response. Following this, the IV line must be maintained with normal saline using a new administration set to ensure vascular access for emergency medications [1]. **2. Analysis of Incorrect Options:** * **B & C (Hydrocortisone and Chlorpheniramine):** These are secondary treatments. Antihistamines (Chlorpheniramine) are used for allergic reactions (Urticaria), and steroids (Hydrocortisone) are used for severe allergic or febrile reactions. However, they should never be administered before stopping the offending agent. * **D (Furosemide):** This is indicated in cases of Transfusion-Associated Circulatory Overload (TACO) to reduce fluid volume or to maintain renal blood flow in hemolytic reactions. It is a supportive measure, not the primary immediate action. **3. NEET-PG High-Yield Clinical Pearls:** * **Acute Hemolytic Transfusion Reaction (AHTR):** Most commonly due to **ABO incompatibility** (clerical error). Classic triad: Fever, chills, and flank pain [1]. * **First Step:** Stop transfusion $\rightarrow$ Check vitals $\rightarrow$ Maintain IV access with NS $\rightarrow$ Notify blood bank [1]. * **Investigation:** Perform a **Direct Antiglobulin Test (DAT/Coombs test)** on the post-transfusion sample and check for hemoglobinuria [1]. * **Febrile Non-Hemolytic Reaction (FNHRT):** The most common reaction overall; caused by cytokines released from donor leukocytes. Prevented by **leukoreduction** [1].

Q: All are true regarding Thrombotic Thrombocytopenia Purpura (TTP), except?

Normal complement levels. Thrombotic Thrombocytopenic Purpura (TTP) is a life-threatening hematologic emergency caused by a deficiency of the metalloproteinase ADAMTS13. This enzyme is responsible for cleaving large von Willebrand factor (vWF) multimers; its absence leads to ultra-large multimers that cause spontaneous platelet aggregation and microthrombi formation. **Why Option A is the correct answer:** In TTP, the primary pathology is a **non-immune** platelet consumption [2]. Unlike conditions like Systemic Lupus Erythematosus (SLE) or certain types of Glomerulonephritis, TTP does **not** involve the activation or consumption of the complement system. Therefore, **complement levels (C3, C4) remain normal**. This is a crucial diagnostic differentiator from other systemic microangiopathies. **Analysis of other options:** * **B. Microangiopathic Hemolytic Anemia (MAHA):** This is a hallmark of TTP [1]. As RBCs pass through small vessels partially occluded by platelet thrombi, they are mechanically shredded, leading to the presence of **schistocytes** on a peripheral smear [1]. * **C. Thrombocytopenia:** Extensive formation of microthrombi consumes platelets, leading to severe consumption-based thrombocytopenia [2]. * **D. Thrombosis:** The core pathophysiology involves widespread hyaline microthrombi in small vessels, which leads to end-organ ischemia (notably in the brain and kidneys) [1]. **High-Yield Clinical Pearls for NEET-PG:** * **The Classic Pentad (FAT RN):** **F**ever, **A**nemia (MAHA), **T**hrombocytopenia, **R**enal failure, and **N**eurological symptoms [1]. * **Coagulation Profile:** PT, aPTT, and Fibrinogen levels are typically **normal** in TTP (unlike DIC). * **Treatment of Choice:** Immediate **Plasmapheresis (Plasma Exchange)** to remove autoantibodies and replenish ADAMTS13.

Q: A 40-year-old woman with chronic lymphocytic leukemia (CLL) presents with rapidly increasing swellings in her neck and axilla over the past few months, accompanied by fever and weight loss. Which of the following is the most likely complication?

Richter transformation. ### Explanation **Correct Option: A. Richter Transformation** Richter transformation (RT) refers to the sudden clinicopathological transformation of Chronic Lymphocytic Leukemia (CLL) or Small Lymphocytic Lymphoma (SLL) into a more aggressive form of high-grade non-Hodgkin lymphoma, most commonly **Diffuse Large B-Cell Lymphoma (DLBCL)** (approx. 90%) [1] or rarely Hodgkin Lymphoma. The clinical hallmark of RT is the **"B-symptoms" triad**: rapid enlargement of lymph nodes (lymphadenopathy), drenching night sweats, fever, and significant weight loss [2]. Laboratory findings often show a sudden rise in Serum LDH levels [1]. This transformation occurs in about 2–10% of CLL patients and carries a poor prognosis. **Why Incorrect Options are Wrong:** * **B. Progression of CLL:** While CLL is a progressive disease, it typically follows an indolent course [1]. Rapid, localized lymph node enlargement with systemic B-symptoms is more characteristic of a high-grade transformation than the natural slow progression of CLL. * **C. Development of secondary infections:** CLL patients are prone to infections due to hypogammaglobulinemia [1]; however, infections usually present with acute inflammatory signs (cough, dysuria, etc.) rather than rapidly growing, painless lymphadenopathy. * **D. Immunodeficiency-associated hemolytic anemia:** While Autoimmune Hemolytic Anemia (AIHA) is a known complication of CLL, it presents with jaundice, pallor, and fatigue, not rapidly enlarging lymph nodes [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Most common transformation:** DLBCL (90%). * **Best Initial Test:** LDH (elevated) and PET-CT (to identify the most metabolically active node). * **Gold Standard Diagnosis:** Excisional Lymph Node Biopsy [2]. * **Prognosis:** Generally poor, with a median survival of less than 1 year. * **Key Trigger:** Often associated with mutations in *TP53* or *NOTCH1*.

Question 1

What is the first-line treatment for the T315I mutation in Chronic Myeloid Leukemia (CML) management?

Accepted Answer

Ponatinib

Answer

Bosutinib

Answer

Tofacitinib

Answer

Nilotinib

Question 2

What is the most common site of lymph node enlargement in Hodgkin's lymphoma?

Accepted Answer

Mediastinal

Answer

Cervical

Answer

Axillary

Answer

Abdominal

Question 3

Neurological symptoms and premature graying of hair are associated with which of the following conditions?

Accepted Answer

Pernicious anemia

Answer

Folic acid deficiency

Answer

Plummer-Vinson syndrome

Answer

Paterson-Kelly syndrome

Question 4

A 23-year-old man presents with prolonged nosebleeds. He has always noted easy bruising and ongoing bleeding after minor cuts. There is no prior history of surgery or dental procedures. His hemoglobin is 14.5 g/dL, platelets are 200,000/mL, and PT/PTT are normal. Further testing reveals that the bleeding time is elevated; the Factor VIII level is reduced, as is the ristocetin cofactor assay. What is the most likely diagnosis for this patient with a bleeding disorder?

Accepted Answer

von Willebrand's disease

Answer

hemophilia A

Answer

hemophilia B

Answer

thrombotic thrombocytopenic purpura (TTP)

Question 5

Which action by a nursing assistant when caring for a patient who is pancytopenic indicates a need for the nurse to intervene?

Accepted Answer

The nursing assistant assists the patient to use dental floss after eating.

Answer

The nursing assistant makes an oral rinse using 1 teaspoon of salt in a liter of water.

Answer

The nursing assistant adds baking soda to the patient’s saline oral rinses.

Answer

The nursing assistant puts fluoride toothpaste on the patient’s toothbrush.

Question 6

If a blood transfusion reaction develops due to incompatibility, what is the first immediate action to be taken?

Accepted Answer

Stop the transfusion

Answer

Administer hydrocortisone injection

Answer

Administer chlorpheniramine maleate injection

Answer

Administer furosemide injection

Question 7

A patient has Hb 6 gm%, folic acid 82 ng/ml, vitamin B12 60 pg/ml, serum iron 180 
g/dL, and MCV of 104 fL. What is the most likely diagnosis?

Accepted Answer

Vitamin B12 deficiency

Answer

Iron deficiency anaemia

Answer

Folic acid deficiency

Answer

Pyridoxine deficiency

Question 8

All are true regarding Thrombotic Thrombocytopenia Purpura (TTP), except?

Accepted Answer

Normal complement levels

Answer

Microangiopathic hemolytic anemia

Answer

Thrombocytopenia

Answer

Thrombosis

Question 9

Which of the following is not associated with multiple myeloma?

Accepted Answer

Carpopedal spasm

Answer

Bone pain

Answer

Metastatic calcification

Answer

Punched out lesion in the skull

Question 10

A 40-year-old woman with chronic lymphocytic leukemia (CLL) presents with rapidly increasing swellings in her neck and axilla over the past few months, accompanied by fever and weight loss. Which of the following is the most likely complication?

Accepted Answer

Richter transformation

Answer

Progression of CLL

Answer

Development of secondary infections

Answer

Immunodeficiency-associated hemolytic anemia

Hematology — MCQs

Hematology — MCQs

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