Evaluation of Bleeding Tendencies — MCQs
Cause of ITP is
Von Willebrand disease involves a deficiency of which factor?
A35 yr old lady with Normal PT and increased aPTT. 2 year back, she was operated for cholecystectomy & did not have any bleeding episode. What is next investigation for clinical diagnosis -
A young patient presents with a large retroperitoneal hemorrhage and a history of intermittent knee swelling after strenuous exercise. There is no history of mucosal bleeding. Which of the following clotting factors is primarily deficient in Hemophilia A?
A 45-year-old male presents with hematemesis and melena. He is hemodynamically stable. What is the most appropriate initial diagnostic test?
Which of the following can result in dactylitis
A 30-year-old third gravida, who has a 3-year-old child and had undergone a MTP one year ago, has presented with 30-weeks pregnancy. She complains of having vaginal bleeding 2 hours ago. She has not received any antenatal care. Her pulse is 78 beats per minute, and the BP is 102/58 mmHg. The most appropriate management will include: 1. Ultrasonographic evaluation 2. Watch for labour 3. Hospitalisation and bed rest 4. Speculum examination of vagina and cervix 5. I.V. fluid drip Select the appropriate combination:
A 5-year-old boy presents with petechial bleeding and bruising on his torso and limbs. He has no other signs or symptoms and does not appear ill. His mother reports a gastrointestinal infection several weeks prior to the onset of petechiae and bruising. Complete blood count reveals thrombocytopenia (<20 x 10^9/L), with other parameters within the expected range for his age. Prothrombin time, partial thromboplastin time, and metabolic panels are all within the reference range. What is the expected outcome of this blood disorder?
A 21-year-old male presents with anemia and mild hepatosplenomegaly. His hemoglobin is 5 gm/dL, and he has a history of a single blood transfusion to date. What is the most probable diagnosis?
What is the recommended treatment for Kostmann's syndrome?
Evaluation of Bleeding Tendencies Indian Medical PG Practice Questions and MCQs
Question 1: Cause of ITP is
- A. Vasculitis
- B. Antibody to platelets (Correct Answer)
- C. Antibody to vascular epithelium
- D. Antibody to clotting factors
Explanation: The cause of ITP is: ***Antibody to platelets*** - **Immune thrombocytopenic purpura (ITP)** is an autoimmune disorder [1] characterized by the destruction of platelets due to the presence of **autoantibodies**, primarily targeting platelet surface glycoproteins like **GPIIb/IIIa**. - These antibodies lead to premature destruction or increased consumption [1] of platelets by the reticuloendothelial system, particularly in the spleen, resulting in **thrombocytopenia**. *Vasculitis* - **Vasculitis** is inflammation of the blood vessels, which can cause symptoms like purpura but typically does not primarily cause isolated severe thrombocytopenia as seen in ITP. - While it can lead to bleeding manifestations, the underlying mechanism is vascular inflammation, not direct platelet destruction by antibodies. *Antibody to vascular epithelium* - Antibodies to **vascular endothelium** are seen in conditions such as some forms of vasculitis or autoimmune disorders like lupus, but they directly target vessel walls, not platelets. - This typically leads to endothelial damage and inflammation, rather than isolated thrombocytopenia from platelet destruction. *Antibody to clotting factors* - Antibodies to **clotting factors** (e.g., Factor VIII inhibitors) cause **hemophilia-like bleeding disorders** by interfering with the coagulation cascade. - This mechanism results in impaired clot formation, not primarily in low platelet counts as is characteristic of ITP.
Question 2: Von Willebrand disease involves a deficiency of which factor?
- A. Defect in platelet adhesion due to von Willebrand factor deficiency (Correct Answer)
- B. Defect in fibrin formation affecting clot stabilization
- C. Generalized defects involving small blood vessels
- D. Defect in clotting factors affecting secondary hemostasis
Explanation: ***Primary hemostasis*** - Von Willebrand disease primarily affects **primary hemostasis** due to defective or deficient **von Willebrand factor (vWF)**, which is crucial for platelet adhesion [1][3]. - This defect results in **increased bleeding tendencies**, exemplified by symptoms like easy bruising and prolonged bleeding from cuts [2]. *Secondary hemostasis* - Secondary hemostasis involves the **coagulation cascade**, not primarily affected in von Willebrand disease [3]. - Disorders related to secondary hemostasis typically involve factors like **factor VII, IX, or X**, unlike the vWF defect seen here [3]. *Generalized defects involving small vessels* - Generalized defects imply broader issues affecting the **microcirculation**, which is not the primary issue in von Willebrand disease. - While small vessel bleeding can occur, it is not specific to this condition as it does not primarily involve the **platelet aggregation** defect [1]. *Clot stabilization and resorption* - Clot stabilization and resorption primarily involve factors such as **fibrinogen** and cross-linking factors, rather than vWF. - Von Willebrand disease specifically impacts the **platelet function** and does not directly relate to stabilization processes once the clot has formed [1][3].
Question 3: A35 yr old lady with Normal PT and increased aPTT. 2 year back, she was operated for cholecystectomy & did not have any bleeding episode. What is next investigation for clinical diagnosis -
- A. Platelet aggregation test
- B. Anti viper venom assay
- C. Ristocetin cofactor assay
- D. Factor VIII assay (Correct Answer)
Explanation: ***Factor VIII assay*** - An isolated **increased aPTT** with a **normal PT** points to an abnormality in the **intrinsic pathway** of coagulation, which includes Factor VIII [1]. - The absence of bleeding episodes for a cholecystectomy suggests a **mild deficiency** or a defect that doesn't cause severe hemorrhage, making Factor VIII deficiency (Hemophilia A) a strong consideration [2]. *Platelet aggregation test* - This test evaluates **platelet function**, abnormalities of which typically present with mucocutaneous bleeding and a normal PT and aPTT. - The patient's presentation of an isolated prolonged aPTT does not primarily suggest a platelet function disorder. *Anti viper venom assay* - This test is primarily used to detect the presence of **lupus anticoagulant**, which can cause a prolonged aPTT but is often associated with thrombotic events, not bleeding. - While lupus anticoagulant can prolong aPTT without bleeding, a Factor VIII deficiency is a more common cause of an isolated prolonged aPTT that is compatible with no significant bleeding history. *Ristocetin cofactor assay* - This assay is used to evaluate **von Willebrand factor (vWF)** activity, which is involved in platelet adhesion and also stabilizes Factor VIII [3]. - While vWF deficiency can cause a prolonged aPTT, it typically presents with mucocutaneous bleeding, and the patient's history doesn't strongly suggest this [3].
Question 4: A young patient presents with a large retroperitoneal hemorrhage and a history of intermittent knee swelling after strenuous exercise. There is no history of mucosal bleeding. Which of the following clotting factors is primarily deficient in Hemophilia A?
- A. Von Willebrand factor
- B. Lupus anticoagulant
- C. Factor VIII (Correct Answer)
- D. Factor IX
Explanation: ***Factors VIII and IX*** - The symptoms indicate a **hemophilia**, where deficiencies in factors VIII or IX lead to a tendency for **retroperitoneal hemorrhage** and joint swelling, particularly after exercise [1]. - Intermittent swelling of the knees indicates **hemarthrosis**, a common manifestation in hemophilia, supporting the dysfunction of these factors [1]. *Factors XI and XII* - These factors are part of the **intrinsic pathway** but are not primarily associated with **joint bleeding** or sporadic retroperitoneal hemorrhage in young patients. - Deficiencies of these factors typically lead to a milder form of bleeding disorders and not the severe joint symptoms seen here. *Von Willebrand factor* - This factor is crucial for **platelet adhesion** and is associated with **mucosal bleeding**, which is not reported in this patient's history [2]. - The patient's **retroperitoneal hemorrhage** and knee swelling are not characteristic of von Willebrand disease, which typically involves more superficial bleeding [1,2]. *Lupus anticoagulant* - This is an **antiphospholipid antibody** associated with **thrombosis** rather than bleeding, and does not explain the joint swelling or hemorrhagic symptoms. - It leads to a false-positive on coagulation tests and can result in complications like recurrent **thromboembolic events**, rather than bleeding tendencies.
Question 5: A 45-year-old male presents with hematemesis and melena. He is hemodynamically stable. What is the most appropriate initial diagnostic test?
- A. Colonoscopy
- B. Abdominal ultrasound
- C. Upper endoscopy (Correct Answer)
- D. CT scan of the abdomen
Explanation: ***Upper endoscopy*** - **Hematemesis** (vomiting blood) and **melena** (black, tarry stools) are classic signs of an **upper gastrointestinal bleed** [1]. - **Upper endoscopy** allows direct visualization of the esophagus, stomach, and duodenum to identify the bleeding source (e.g., ulcers, varices) and potentially provide therapeutic intervention [2]. *Colonoscopy* - This procedure is used to visualize the **lower gastrointestinal tract** (colon and rectum). - While melena can sometimes originate from the small bowel or right colon, hematemesis strongly points to an upper GI source, making colonoscopy an inappropriate initial diagnostic choice. *Abdominal ultrasound* - An **abdominal ultrasound** is excellent for evaluating solid organs (e.g., liver, gallbladder, kidneys) and detecting fluid collections. - It does not directly visualize the GI mucosa or lumen to identify the source of active bleeding. *CT scan of the abdomen* - A **CT scan of the abdomen** can identify gross pathologies and sometimes show active bleeding, but it is less sensitive for mucosal lesions and does not allow for direct therapeutic intervention. - It is generally reserved for cases where endoscopy is inconclusive or contraindicated, or when there is suspicion of a mass or perforation.
Question 6: Which of the following can result in dactylitis
- A. Sickle Cell Anemia (Correct Answer)
- B. Hemophilia
- C. Measles
- D. Von Willebrand disease
Explanation: ***Sickle Cell Anemia*** - **Dactylitis**, often called **hand-foot syndrome**, is an early manifestation of sickle cell disease in children, caused by **vaso-occlusion** in the small bones of the hands and feet [1]. - This **ischemia** leads to severe pain, swelling, and tenderness in the affected digits [1]. *Hemophilia* - Hemophilia is a **bleeding disorder** characterized by deficient clotting factors, primarily leading to spontaneous bleeding into joints (**hemarthrosis**) and soft tissues. - It does not directly cause dactylitis, which is typically due to **ischemia** or inflammation of the digits. *Measles* - Measles is a **viral infection** that primarily causes fever, rash, cough, conjunctivitis, and coryza. - While it can cause some joint pain (**arthralgia**) in adults, it does not lead to dactylitis. *Von Willebrand disease* - This is a **heritable bleeding disorder** caused by a deficiency or dysfunction of **von Willebrand factor**, leading to easy bruising and prolonged bleeding times. - Similar to hemophilia, it causes bleeding-related symptoms and does not result in dactylitis.
Question 7: A 30-year-old third gravida, who has a 3-year-old child and had undergone a MTP one year ago, has presented with 30-weeks pregnancy. She complains of having vaginal bleeding 2 hours ago. She has not received any antenatal care. Her pulse is 78 beats per minute, and the BP is 102/58 mmHg. The most appropriate management will include: 1. Ultrasonographic evaluation 2. Watch for labour 3. Hospitalisation and bed rest 4. Speculum examination of vagina and cervix 5. I.V. fluid drip Select the appropriate combination:
- A. 1, 3 and 5 (Correct Answer)
- B. 2, 3 and 4
- C. 1 and 2
- D. 1, 4 and 5
Explanation: ***1, 3 and 5*** - This patient presents with **third-trimester vaginal bleeding** without prior antenatal care, which is a significant red flag requiring immediate investigation and management. An **ultrasonographic evaluation** is crucial to determine the cause of bleeding, especially to rule out **placenta previa** or **abruptio placentae**, which dictate further management. - **Hospitalization and bed rest** are essential to stabilize the patient, monitor the bleeding, and prepare for potential complications. Initiating an **I.V. fluid drip** is critical for maintaining **hemodynamic stability**, especially given her low blood pressure of 102/58 mmHg, and for providing immediate venous access. *2, 3 and 4* - **Watching for labor** without first establishing the cause of bleeding is inappropriate and potentially dangerous, as active management might be needed. - A **speculum examination** should *not* be the initial step before an ultrasound, as a digital or speculum exam in cases of undiagnosed placenta previa can provoke severe hemorrhage. *1 and 2* - While an **ultrasound (1)** is necessary to diagnose the cause of bleeding, **watching for labor (2)** without further intervention or stabilization is insufficient for a woman with third-trimester bleeding, especially with no prior antenatal care. - This option misses crucial components like hospitalization, bed rest, and IV fluids, which are part of initial stabilization. *1, 4 and 5* - **Ultrasonographic evaluation (1)** and **I.V. fluid drip (5)** are appropriate, but **speculum examination of the vagina and cervix (4)** should be avoided until placenta previa is ruled out by ultrasound. - A digital or speculum exam could exacerbate bleeding if **placenta previa** is present, making this a potentially harmful step in the initial management.
Question 8: A 5-year-old boy presents with petechial bleeding and bruising on his torso and limbs. He has no other signs or symptoms and does not appear ill. His mother reports a gastrointestinal infection several weeks prior to the onset of petechiae and bruising. Complete blood count reveals thrombocytopenia (<20 x 10^9/L), with other parameters within the expected range for his age. Prothrombin time, partial thromboplastin time, and metabolic panels are all within the reference range. What is the expected outcome of this blood disorder?
- A. Complete resolution is expected. (Correct Answer)
- B. Survival rate is up to 70% depending on risk stratification.
- C. Lifelong disease dependent on factor VIII substitution.
- D. Lifelong disease dependent on factor IX substitution.
Explanation: ### Explanation The clinical presentation describes a classic case of **Immune Thrombocytopenic Purpura (ITP)**, the most common cause of isolated thrombocytopenia in children. **1. Why Option A is Correct:** In children, ITP typically follows a viral infection (respiratory or gastrointestinal) after a 1–4 week latent period. It is characterized by the sudden onset of petechiae and bruising in an otherwise healthy-appearing child. The hallmark is **isolated thrombocytopenia** (Platelets <100 x 10⁹/L) with normal PT, PTT, and hemoglobin. The prognosis is excellent; approximately **70–80% of children achieve complete spontaneous resolution** within 6 months, regardless of therapy. **2. Why the Other Options are Incorrect:** * **Option B:** This refers to the survival rates of pediatric malignancies like Acute Lymphoblastic Leukemia (ALL). While ALL presents with bruising, it typically involves "sick" symptoms (fever, bone pain), hepatosplenomegaly, and abnormalities in other cell lines (anemia/leukocytosis). * **Options C & D:** These describe **Hemophilia A (Factor VIII)** and **Hemophilia B (Factor IX)**. Hemophilias are coagulation factor deficiencies that present with deep tissue bleeds (hemarthrosis/hematomas) and a **prolonged aPTT**, rather than petechiae and isolated thrombocytopenia. **3. NEET-PG High-Yield Pearls:** * **Pathophysiology:** Anti-platelet antibodies (IgG) directed against GP IIb/IIIa or GP Ib/IX. * **Bone Marrow:** Not routinely required but would show **increased megakaryocytes** (compensatory). * **Management:** Observation is preferred if bleeding is minimal (dry purpura). If treatment is needed (wet purpura/active bleeding), **IVIG** or **Corticosteroids** are first-line. * **Chronic ITP:** Defined as thrombocytopenia persisting >12 months (occurs in ~20% of cases).
Question 9: A 21-year-old male presents with anemia and mild hepatosplenomegaly. His hemoglobin is 5 gm/dL, and he has a history of a single blood transfusion to date. What is the most probable diagnosis?
- A. Thalassemia major
- B. Thalassemia minor
- C. Thalassemia intermedia
- D. Autoimmune hemolytic anemia (Correct Answer)
Explanation: ### Explanation **Correct Option: D. Autoimmune Hemolytic Anemia (AIHA)** The key to this question lies in the **age of presentation** and the **transfusion history**. 1. **Age:** A 21-year-old presenting with severe anemia (Hb 5 gm/dL) for the first time suggests an acquired or late-onset condition rather than a severe congenital hemoglobinopathy. 2. **Transfusion History:** The patient has received only **one transfusion** in 21 years despite a very low hemoglobin. This "transfusion-sparing" clinical course rules out Thalassemia Major. 3. **Clinical Features:** Hepatosplenomegaly is common in AIHA due to extramedullary hematopoiesis and splenic sequestration of antibody-coated RBCs. --- ### Why the other options are incorrect: * **A. Thalassemia Major:** This typically presents in **infancy (6–9 months)** as fetal hemoglobin (HbF) levels drop. Without regular monthly transfusions, these patients do not survive to age 21 with a hemoglobin of 5 gm/dL. * **B. Thalassemia Minor:** This is usually an asymptomatic carrier state. While mild anemia may be present, the hemoglobin rarely drops to 5 gm/dL, and hepatosplenomegaly is typically absent. * **C. Thalassemia Intermedia:** While these patients present later than Thalassemia Major and are "transfusion-independent," they usually maintain a hemoglobin between 7–10 gm/dL. A drop to 5 gm/dL at age 21 without a prior history of regular transfusions is more characteristic of an acute hemolytic process like AIHA. --- ### NEET-PG High-Yield Pearls: * **Thalassemia Major:** "Transfusion-dependent"; presents with "Chipmunk facies" and "Hair-on-end" appearance on X-ray. * **AIHA Diagnosis:** The gold standard investigation is the **Direct Coombs Test (Direct Antiglobulin Test)**. * **Clinical Clue:** If a young adult presents with sudden severe anemia and splenomegaly, always consider AIHA or a late-presenting Hereditary Spherocytosis.
Question 10: What is the recommended treatment for Kostmann's syndrome?
- A. Anti-thymocyte globulin plus cyclosporin
- B. Anti-thymocyte globulin plus cyclosporin plus GM-CSF
- C. G-CSF (Correct Answer)
- D. GM-CSF
Explanation: **Explanation:** **Kostmann’s Syndrome** (Severe Congenital Neutropenia) is an autosomal recessive disorder characterized by a maturation arrest of neutrophil precursors in the bone marrow at the **promyelocyte/myelocyte stage**. This leads to absolute neutrophil counts (ANC) frequently below 200/mm³, predisposing infants to life-threatening pyogenic infections. **Why G-CSF is the Correct Answer:** The primary goal of treatment is to increase the production and maturation of neutrophils. **Granulocyte Colony-Stimulating Factor (G-CSF)** is the gold-standard treatment. It effectively increases the ANC in over 90% of patients, significantly reducing the frequency of infections and improving survival. While Hematopoietic Stem Cell Transplant (HSCT) is the definitive cure, G-CSF is the first-line medical management. **Why Other Options are Incorrect:** * **Options A & B:** Anti-thymocyte globulin (ATG) and Cyclosporin are immunosuppressive therapies used for **Aplastic Anemia**, where the pathology is T-cell mediated destruction of stem cells. Kostmann’s is a genetic maturation defect, not an autoimmune process. * **Option D:** **GM-CSF** (Granulocyte-Macrophage CSF) is less effective than G-CSF and is associated with more systemic side effects (like fever and bone pain) without providing a superior neutrophil response in these patients. **High-Yield Clinical Pearls for NEET-PG:** * **Genetics:** Most common mutation in Severe Congenital Neutropenia is **ELANE** (autosomal dominant), but the classic **Kostmann’s** specifically refers to the **HAX1** mutation (autosomal recessive). * **Bone Marrow Finding:** Characterized by "maturation arrest" at the promyelocyte stage. * **Malignancy Risk:** Patients have a significantly increased risk of developing **Acute Myeloid Leukemia (AML)** or Myelodysplastic Syndrome (MDS), even with G-CSF treatment. * **Definitive Treatment:** For patients refractory to G-CSF or those developing MDS/AML, **Stem Cell Transplant** is the only curative option.
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