Vascular Diseases in Specific Organs — MCQs
An 85-year-old man presents with a sudden onset of severe occipital headache, vomiting on two occasions, and double vision. He has a history of hypertension. His examination findings are a Glasgow Coma Scale of 15/15, mild neck stiffness, and normal power in both upper and lower limbs. Where is the likely site of pathology?
What is a characteristic fundoscopic finding in advanced hypertensive retinopathy?
What is the appropriate fluid management in the case of an intracerebral hemorrhage?
Most common site of hypertensive intraparenchymal hemorrhage in the brain?
Patient with clinical signs of DVT had tachycardia and history of bladder cancer. According to modified Well's scoring, the probability of pulmonary embolism would be :
Which is the best test to detect pulmonary embolism?
A woman shows symptoms of massive pulmonary thromboembolism. Based on the gross appearance of the liver autopsy, which of the following statements best characterizes the patient’s condition?
Monckeberg's calcific sclerosis primarily affects which layer of the medium-sized muscular arteries?
In which condition is the 'Picture frame vertebra' seen?
A red soft to firm swelling on the sternum shows proliferation of endothelial cells forming vascular channels on biopsy. What is the most likely diagnosis?
Vascular Diseases in Specific Organs Indian Medical PG Practice Questions and MCQs
Question 1: An 85-year-old man presents with a sudden onset of severe occipital headache, vomiting on two occasions, and double vision. He has a history of hypertension. His examination findings are a Glasgow Coma Scale of 15/15, mild neck stiffness, and normal power in both upper and lower limbs. Where is the likely site of pathology?
- A. Posterior communicating artery (Correct Answer)
- B. Lenticulostriate artery
- C. P1 Segment of Posterior cerebral artery
- D. Anterior communicating artery
Explanation: ***Posterior communicating artery*** - Aneurysms in the **posterior communicating artery** are notorious for causing **oculomotor nerve (CN III) palsy**, leading to **double vision** due to impairment of eye movements. [2] - The sudden onset of severe **occipital headache** and **vomiting** suggests a subarachnoid hemorrhage, which is a common presentation of a ruptured cerebral aneurysm. [1] *Anterior communicating artery* - Aneurysms here typically present with **bifrontal headaches** and can cause **visual field defects** or **cranial nerve deficits** affecting the optic chiasm. - It usually does not specifically cause **double vision** due to oculomotor nerve involvement as a primary symptom. *Lenticulostriate artery* - These are small perforating arteries that supply the **basal ganglia** and **internal capsule**. - Rupture most commonly causes **intracerebral hemorrhage**, leading to motor or sensory deficits depending on the affected area, but less typically presents with isolated double vision or occipital headache. *P1 Segment of Posterior cerebral artery* - Aneurysms in the **P1 segment** are rare and typically involve structures around the **midbrain**, potentially causing specific neurological deficits like **contralateral hemiparesis** or **visual defects**. - While rupture can cause subarachnoid hemorrhage, presentation with isolated double vision from oculomotor nerve palsy is less characteristic than with a posterior communicating artery aneurysm.
Question 2: What is a characteristic fundoscopic finding in advanced hypertensive retinopathy?
- A. Cotton wool spots (Correct Answer)
- B. Microaneurysms
- C. Cherry-red spot
- D. Drusen
Explanation: ***Cotton wool spots*** - These are **soft exudates** that represent **acute focal infarction of the retinal nerve fiber layer** due to severe hypertension, indicating advanced hypertensive retinopathy (Grade III-IV). - They appear as **fluffy, white patches** with irregular, feathery borders in the superficial retina, caused by **ischemia and disruption of axoplasmic flow**. - In Grade IV (malignant hypertension), **optic disc edema** may also be present alongside cotton wool spots. *Microaneurysms* - These are small, dot-like hemorrhages common in **diabetic retinopathy**, resulting from weakened capillary walls. - While hypertension can coexist with diabetes and exacerbate retinal changes, **microaneurysms** are not a primary, characteristic finding of hypertensive retinopathy itself. *Cherry-red spot* - A **cherry-red spot** is a classic finding in **central retinal artery occlusion (CRAO)** and **Tay-Sachs disease**, due to the transparent fovea allowing visualization of the underlying choroidal circulation. - It does not characterize hypertensive retinopathy. *Drusen* - **Drusen** are yellow deposits under the retina, primarily associated with **age-related macular degeneration (AMD)**. - They are not a feature of hypertensive retinopathy.
Question 3: What is the appropriate fluid management in the case of an intracerebral hemorrhage?
- A. Normal saline (Correct Answer)
- B. Colloids
- C. Blood transfusion
- D. Hypertonic fluids
Explanation: **Normal saline** - **Normal saline (0.9% NaCl)** is the preferred fluid for volume maintenance in patients with **intracerebral hemorrhage (ICH)** as it is an isotonic crystalloid. - It helps maintain an adequate **cerebral perfusion pressure (CPP)** and avoids hypotonic effects that could worsen cerebral edema. *Colloids* - **Colloids** are generally avoided in ICH as they can potentially **increase intracranial pressure (ICP)** due to their osmotic effects within the damaged blood-brain barrier. - They are also associated with **increased risk of cerebral edema** and poor neurological outcomes in stroke patients. *Blood transfusion* - **Blood transfusions** are indicated only in cases of significant **anemia** (typically hemoglobin < 7-8 g/dL) or active bleeding where oxygen delivery to the brain is compromised. - Routine blood transfusion without clear indication is not part of standard fluid management for ICH and carries risks. *Hypertonic fluids* - **Hypertonic saline (e.g., 3% NaCl)** or **mannitol** are used specifically for the acute management of **elevated intracranial pressure (ICP)**, not for routine fluid maintenance. - While they improve cerebral perfusion by reducing brain edema, their continuous use as maintenance fluid can lead to severe electrolyte imbalances and dehydration.
Question 4: Most common site of hypertensive intraparenchymal hemorrhage in the brain?
- A. Putamen (Correct Answer)
- B. Thalamus
- C. Cerebellum
- D. Pons
Explanation: ***Putamen*** - The **putamen** is the most frequent site for **hypertensive intraparenchymal hemorrhages** [1] due to the presence of numerous small, thin-walled arterioles (lenticulostriate arteries) that are highly susceptible to damage from chronic hypertension [1]. - Hemorrhages in this region often cause **contralateral hemiparesis**, **hemianesthesia**, and **gaze deviation** towards the side of the lesion due to involvement of nearby motor and sensory pathways [1]. *Thalamus* - While the **thalamus** is a common site for hypertensive hemorrhages, it is less common than the putamen [1], [2]. - Thalamic hemorrhages typically cause **contralateral sensory loss**, **oculomotor dysfunction**, and sometimes **aphasia** if the dominant hemisphere is affected. *Cerebellum* - **Cerebellar hemorrhages** are less frequent than those in the basal ganglia or thalamus [1]. - Symptoms usually include **ataxia**, **nystagmus**, vomiting, and potential brainstem compression if large. *Pons* - **Pontine hemorrhages** are among the most severe and are often rapidly fatal due to damage to vital brainstem structures [1], [2]. - They typically present with **coma**, **quadriparesis**, **pinpoint pupils**, and rapid progression to respiratory arrest.
Question 5: Patient with clinical signs of DVT had tachycardia and history of bladder cancer. According to modified Well's scoring, the probability of pulmonary embolism would be :
- A. Low
- B. High
- C. Intermediate (Correct Answer)
- D. Intermediate
Explanation: **Intermediate** - Clinical signs of **DVT (3 points)**, **tachycardia (heart rate > 100 bpm, 1.5 points)**, and a history of **cancer (1 point)** sum up to 5.5 points, which falls within the range for an intermediate probability (2-6 points) on the modified Well's score for PE. - The modified Well's criteria assigns specific points for risk factors and clinical findings, guiding the diagnostic approach for pulmonary embolism [1]. *Low* - A low probability for PE according to the modified Well's score is indicated by a total score of **less than 2 points** [1]. - The patient's presentation accumulates significantly more points than this threshold due to multiple contributing factors. *High* - A high probability for PE according to the modified Well's score is indicated by a total score of **greater than 6 points** [1]. - The patient's score of 5.5 points does not meet this threshold, placing them in the intermediate category.
Question 6: Which is the best test to detect pulmonary embolism?
- A. D dimer assay
- B. MRI
- C. Ventilation Perfusion scan
- D. CT with IV contrast (Correct Answer)
Explanation: ***CT with IV contrast*** - **CT pulmonary angiography (CTPA)** is the **gold standard** for diagnosing pulmonary embolism due to its high sensitivity and specificity [1]. - It directly visualizes the **pulmonary arteries** and can detect emboli, making it the most definitive imaging test [1]. *D dimer assay* - A **negative D-dimer** can effectively **rule out PE** in low-to-intermediate probability patients, but a positive result is non-specific and requires further investigation. - It is a screening test with **poor specificity** in many clinical situations, such as surgery, trauma, cancer, or pregnancy, where D-dimer levels can be elevated for other reasons. *MRI* - **Magnetic resonance angiography (MRA)** can be used for PE diagnosis, particularly in patients unable to receive iodinated contrast or radiation. - However, it has **lower spatial resolution** and is generally less available and slower than CTPA, making it a second-line option. *Ventilation Perfusion scan* - A **V/Q scan** measures airflow (ventilation) and blood flow (perfusion) in the lungs to detect mismatches suggestive of PE [1]. - While useful, particularly in patients with **renal insufficiency** or **contrast allergy**, it often yields indeterminate results and is less sensitive than CTPA for definitive diagnosis [1].
Question 7: A woman shows symptoms of massive pulmonary thromboembolism. Based on the gross appearance of the liver autopsy, which of the following statements best characterizes the patient’s condition?
- A. Primary liver angiosarcoma
- B. Locally invaded hepatocellular carcinoma
- C. Colonic adenocarcinoma with liver metastasis
- D. Chronic passive congestion with centrilobular necrosis (Correct Answer)
Explanation: ***Colonic adenocarcinoma with metastasis*** - The presence of **massive pulmonary thromboembolism** often indicates **underlying malignancy** [2], particularly with **colonic adenocarcinoma** known to metastasize to the liver [1]. - This condition may present with **liver lesions** at autopsy, consistent with metastatic disease [1], supporting this diagnosis. *Metastasis from PE* - Pulmonary embolism (PE) itself does not typically give rise to **metastatic disease**; instead, it commonly arises from **deep vein thrombosis** (DVT) [2]. - This onfuses the cause of PE with its potential effects, lacking the **specificity** of a primary cancer origin. *Locally invaded hepatocellular carcinoma* - This option indicates a primary liver cancer impacting the liver directly, which would not cause **massive pulmonary thromboembolism** as its primary feature. - While hepatocellular carcinoma can cause some vascular complications, it does not correlate with **colonic adenocarcinoma** or metastatic patterns indicative of PE. *Angiosarcoma* - Though angiosarcoma is a **primary liver tumor**, it is rare and does not typically present with **massive pulmonary embolism** as a hallmark manifestation. - This type of cancer generally has a different clinical picture and distinct risk factors compared to **colonic adenocarcinoma**, making it an **unlikely option** in this context. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, p. 282. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lung, p. 705.
Question 8: Monckeberg's calcific sclerosis primarily affects which layer of the medium-sized muscular arteries?
- A. Intima
- B. Media (Correct Answer)
- C. Adventitia
- D. Intima and Media
Explanation: ***Media*** - Monckeberg's calcific sclerosis, also known as **medial calcinosis**, specifically involves the **tunica media** of medium-sized muscular arteries. - This condition is characterized by **calcific deposits** within the smooth muscle layer of the artery wall, without significant luminal narrowing. - Classic "**tram-track**" or "railroad track" appearance on imaging due to medial calcification. *Intima* - The **intima** is primarily affected in **atherosclerosis**, where plaque formation occurs within this innermost layer. - Monckeberg's sclerosis is distinct from atherosclerosis and does not involve significant intimal thickening or lipid deposition. *Adventitia* - The **adventitia** is the outermost layer of the arterial wall, providing structural support and containing nerves and vasa vasorum. - Monckeberg's calcification does not typically involve this layer. *Intima and Media* - While Monckeberg's sclerosis **exclusively affects the media**, this option incorrectly suggests intimal involvement. - The pathognomonic feature of Monckeberg's is its **restriction to the medial layer**, distinguishing it from atherosclerosis.
Question 9: In which condition is the 'Picture frame vertebra' seen?
- A. Paget disease (Correct Answer)
- B. Osteopetrosis (marble bone disease)
- C. Ankylosing spondylitis (AS)
- D. Osteoporosis
Explanation: ***Paget disease*** - The "picture frame vertebra" sign is a classic radiographic finding in **Paget disease**, characterized by **cortical thickening** and sclerosis around the vertebral body circumference, resembling a picture frame. - This appearance is due to the disordered bone remodeling processes (increased osteoclastic bone resorption followed by disorganized osteoblastic new bone formation) characteristic of Paget disease. *Osteopetrosis (marble bone disease)* - Osteopetrosis is characterized by **increased bone density** due to defective osteoclast function, leading to bones that are dense but brittle. - It does not typically present with the specific "picture frame" appearance of individual vertebrae, but rather with diffuse sclerosis of bones. *Ankylosing spondylitis (AS)* - Ankylosing spondylitis primarily affects the **axial skeleton**, causing inflammation and eventual fusion of the vertebrae (leading to a "bamboo spine" appearance). - While it involves the spine, it does not produce the "picture frame" vertebral sign seen in Paget disease. *Osteoporosis* - Osteoporosis is characterized by **reduced bone mass** and microstructural deterioration of bone tissue, leading to increased bone fragility and fracture risk. - Radiographically, it shows **decreased bone density** and possible vertebral compression fractures, which is the opposite of the increased bone density and cortical thickening seen in the "picture frame" sign.
Question 10: A red soft to firm swelling on the sternum shows proliferation of endothelial cells forming vascular channels on biopsy. What is the most likely diagnosis?
- A. Hemangioma (Correct Answer)
- B. Osteochondroma
- C. Osteoid osteoma
- D. Paget disease
Explanation: ***Hemangioma*** - The soft to firm swelling and histological findings indicative of vascular spaces are characteristic of a **hemangioma**, often presenting as a benign vascular tumor [1][2]. - Commonly found in the **sternum**, it may show red or bluish discoloration and typically undergoes a **biopsy** revealing endothelial cell proliferation [2]. *Osteochondroma* - This is a **benign bone tumor** that arises from the growth plate but typically presents as a hard, bony mass rather than a soft swelling. - Histologically, it shows **cartilaginous cap** and is associated with bone rather than vascular structures. *Osteoid osteoma* - Usually presents as a **painful, small bone lesion** often found in the long bones, generally not in the sternum and characterized by a **nidus** of osteoid. - The biopsy would show a **central nidus** with osteoid and woven bone, not consistent with soft swellings. *Paget disease* - This chronic bone disorder involves excessive bone remodeling, leading to enlarged and deformed bones rather than a discrete swelling. - Histologically, it would show **disorganized bone** formation and is not associated with soft or firm masses like hemangiomas. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of Infancy and Childhood, pp. 481-482. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of Infancy and Childhood, pp. 523-524.
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