Clinical Manifestations and Presentation of Diseases Practice Questions

Q: Which of the following conditions is NOT typically associated with low glucose levels in pleural fluid?

Dressler's syndrome. ***Dressler's syndrome*** - Also known as post-myocardial infarction syndrome, is an **inflammatory reaction** that typically presents with a **transudative pleural effusion**. - Pleural fluid analysis in Dressler's syndrome usually shows n**ormal or slightly elevated glucose levels**, as inflammation is not severe enough to cause significant glucose consumption by metabolic activity in the pleural space. *Empyema* - Characterized by significant **bacterial activity** within the pleural space, leading to a high metabolic demand. - Bacteria and inflammatory cells consume glucose, resulting in **very low pleural fluid glucose levels**. *Malignant pleural effusion* - Malignant cells within the pleural space have a high metabolic rate and consume glucose. - This often leads to **low pleural fluid glucose levels**, especially in extensive or rapidly growing malignancies. *Rheumatoid arthritis* - Pleural effusions associated with **rheumatoid arthritis** often present with very low glucose levels. - This is due to the presence of numerous **inflammatory cells** and high metabolic activity within the inflamed pleura.

Q: Which vitamin deficiency is commonly associated with night blindness and other vision problems?

Vitamin A. ### Vitamin A - **Vitamin A** (retinol) is a crucial component of **rhodopsin**, a pigment found in the **rod cells** of the retina, which is essential for vision in **low light conditions** [1], [2]. - A deficiency in Vitamin A leads to **impaired rhodopsin regeneration**, causing **night blindness** (nyctalopia) and, in severe cases, can progress to **xerophthalmia** and permanent blindness due to damage to the cornea and conjunctiva [1], [4]. ### Vitamin C - **Vitamin C** (ascorbic acid) is important for **collagen synthesis**, acting as an antioxidant, and supporting immune function. - Deficiency leads to **scurvy**, characterized by gum inflammation, bleeding, and poor wound healing, but it is not directly associated with night blindness. ### Vitamin E - **Vitamin E** is a powerful **antioxidant** that protects cell membranes from oxidative damage. - While it plays a role in nerve and muscle health, its deficiency is mainly associated with neurological problems like **ataxia** and peripheral neuropathy, not night blindness [3]. ### Vitamin B12 - **Vitamin B12** (cobalamin) is vital for **red blood cell formation**, neurological function, and DNA synthesis. - Deficiency can cause **megaloblastic anemia** and neurological damage, including **peripheral neuropathy** and visual disturbances such as optic neuropathy, but night blindness is not a primary symptom.

Q: Casal's necklace is associated with the deficiency of:

Deficiency of Niacin (Vitamin B3). ***Deficiency of Niacin (Vitamin B3)*** - **Casal's necklace** is a characteristic dermatological manifestation of **pellagra**, which is caused by **niacin (Vitamin B3) deficiency**. - It presents as a **symmetrical, photosensitive dermatitis** on the neck and other sun-exposed areas, resembling a necklace. *Deficiency of Vitamin A* - Vitamin A deficiency primarily affects **vision**, leading to **night blindness** and **xerophthalmia**. - It can also cause follicular **hyperkeratosis** (dry, rough skin), but not the distinct 'necklace' pattern seen in pellagra. *Deficiency of Iron* - Iron deficiency typically causes **anemia**, leading to symptoms like **fatigue**, **pallor**, and **koilonychia** (spoon-shaped nails). - It does not directly cause skin lesions like Casal's necklace. *Deficiency of Vitamin B12* - Vitamin B12 deficiency is associated with **megaloblastic anemia** and **neurological symptoms** (e.g., peripheral neuropathy, cognitive impairment). - While it can cause **hyperpigmentation** in some cases, it does not specifically manifest as Casal's necklace.

Q: Identify the condition given in the image below?

Chronic lymphedema. ***Chronic lymphedema*** - The image shows a **swollen foot** with **thickened, dry, and hyperkeratotic skin**, and **deep skin folds**, particularly between the toes. This is characteristic of **chronic lymphedema** due to impaired lymphatic drainage. - The presence of the **Stemmer's sign** (inability to pinch and lift the skin at the base of the second toe) is a common finding in lymphedema, which can be inferred from the overall appearance of the toes. *Cushing syndrome* - Cushing syndrome is characterized by **central obesity**, **moon facies**, **buffalo hump**, and **thin, fragile skin** with **striae**, not typically severe localized edema and skin changes as seen in the image. - While fluid retention can occur, it does not manifest as the characteristic cutaneous changes of chronic lymphedema. *Osteoporosis* - Osteoporosis is a condition of **decreased bone density**, making bones fragile and prone to fractures. - It does not present with visible skin changes or edema as depicted in the image. *None of the options* - The image clearly shows severe manifestations identifiable as **chronic lymphedema**, therefore one of the provided options is correct.

Q: A 50 year old male presents with fever and malaise for 4 months and pain in the knees and ankles. Blood tests are normal apart from a raised ESR. Chest x-ray shows bilateral hilar adenopathy and pulmonary infiltrates most severe in the upper and mid zones. Mantoux test is negative. What is the most likely diagnosis?

Sarcoidosis. ***Sarcoidosis*** - The constellation of **bilateral hilar adenopathy**, pulmonary infiltrates (especially in upper/mid zones), **arthralgia** (knees and ankles), and a **negative Mantoux test** in a patient with unexplained fever and malaise is highly suggestive of sarcoidosis [1]. - A **raised ESR** is a non-specific inflammatory marker often seen in sarcoidosis. *Tuberculosis* - While tuberculosis can cause fever, malaise, pulmonary infiltrates, and elevated ESR, a **negative Mantoux test** makes primary or active tuberculosis less likely in an immunocompetent individual. - **Bilateral hilar adenopathy** is also less typical of primary pulmonary tuberculosis compared to sarcoidosis. *Asbestosis* - This is an **occupational lung disease** caused by asbestos exposure, primarily presenting with **progressive dyspnea** and **restrictive lung disease**. - It characteristically involves the **lower lobes**, causes **pleural plaques**, and is not typically associated with acute arthralgia, fever, or prominent hilar adenopathy. *Berylliosis* - This is another **occupational lung disease** resulting from beryllium exposure, often mimicking sarcoidosis both clinically and pathologically [2]. - However, without a history of **beryllium exposure** and given the classic presentation, sarcoidosis is a more prevalent default diagnosis [2].

Q: Which of the following exocrine glandular ducts are not obstructed in cystic fibrosis?

Sweat gland. ***Sweat gland*** - In cystic fibrosis, the **CFTR protein** in sweat glands is defective, leading to **impaired chloride reabsorption** and excessively salty sweat [1]. - This defect causes dysfunctional sweat production but **does not result in obstruction** of the sweat gland ducts, which continue to secrete. *Pancreas* - The **exocrine pancreatic ducts** are frequently obstructed in cystic fibrosis due to the production of **thick, sticky mucus**. - This obstruction leads to maldigestion and **pancreatic insufficiency**, requiring enzyme replacement therapy. *Lung* - **Bronchial ducts** and airways in the lungs are severely affected by the accumulation of **viscous mucus**, leading to chronic obstruction [1]. - This obstruction impairs mucociliary clearance, making patients susceptible to recurrent **pulmonary infections** and progressive lung damage [1], [2]. *None of the options* - This option is incorrect because sweat glands are indeed not obstructed, making option C the appropriate answer.

Q: Which of the following conditions is least likely to cause multiple painful ulcers on the tongue?

Sarcoidosis. ***Sarcoidosis*** - While sarcoidosis can affect any organ, **oral involvement is rare** and typically presents as **nodules, plaques, or generalized swelling**, not usually multiple painful ulcers on the tongue. - The lesions, when they occur, are often **painless** and appear as submucosal nodules, red patches, or diffuse swelling. *TB* - Oral tuberculosis can present as **multiple painful ulcers** on the tongue, often with a **granulomatous appearance** mimicking squamous cell carcinoma. - These ulcers are typically **irregular, undermined, and persistent**, often associated with pulmonary TB. *Herpes* - **Herpes simplex virus (HSV)** infection, particularly primary herpetic gingivostomatitis, commonly causes **multiple painful ulcers** on the tongue, gums, and other oral mucosa. - These ulcers begin as vesicles that **rupture to form painful erosions** and are a classic presentation of oral herpes. *Behcet disease* - **Oral aphthous ulcers** are a hallmark feature of Behcet disease, commonly presenting as **multiple, recurrent, painful ulcers** on the tongue and other oral mucosal surfaces. - These ulcers are clinically indistinguishable from common aphthous stomatitis but are more frequent and often associated with genital ulcers, skin lesions, and ocular inflammation.

Q: Which of the following is a feature of crush syndrome -

Myoglobinuria. ***Myoglobinuria*** - **Crush syndrome** is characterized by extensive **muscle damage** and the release of intracellular components. - **Myoglobinuria** occurs when damaged muscle cells release large amounts of **myoglobin** into the bloodstream, which is then filtered by the kidneys, potentially leading to **acute kidney injury**. *Hyperkalemia (high potassium levels)* - While **crush syndrome** does cause **hyperkalemia** due to the release of intracellular potassium from damaged muscle cells, the question asks for *a* feature, and myoglobinuria is a direct and defining consequence of muscle breakdown seen in this condition. - Elevated potassium levels can lead to dangerous cardiac arrhythmias and are a critical and life-threatening complication of **crush injury**. *Hypocalcemia (low calcium levels)* - Crush syndrome typically leads to **hypercalcemia** rather than profound hypocalcemia, due to bone damage or excessive breakdown, though calcium can bind to damaged muscle tissue and precipitate, causing some transient reduction. - **Hypocalcemia** is not a primary or direct feature of **crush syndrome**'s pathophysiology in the way myoglobinuria is. *Hyperphosphatemia (high phosphate levels)* - **Hyperphosphatemia** is indeed a feature of **crush syndrome** because **phosphate** is released from damaged muscle cells and is an intracellular anion. - However, **myoglobinuria** is specifically indicative of muscle damage and plays a direct role in the kidney complications, making it a more defining feature in the context of the damage process itself.

Q: Which zone of the prostate is primarily involved in Benign Prostatic Hyperplasia (BPH)?

Transitional zone. ***Transitional zone*** - The **transitional zone** surrounds the urethra and is the primary site of origin and enlargement in **Benign Prostatic Hyperplasia (BPH)**. - Its hypertrophy leads to compression of the urethra, causing **lower urinary tract symptoms (LUTS)**. *Central zone* - The **central zone** surrounds the ejaculatory ducts and is less commonly involved in BPH. - It is more frequently associated with the development of **prostate carcinoma**. *Peripheral zone* - The **peripheral zone** is the largest zone of the prostate and is where the majority of prostate cancers originate. - While it can be affected by BPH, it is not the primary zone for hypertrophy. *Prostate capsule* - The **prostate capsule** is the outer fibrous layer that encloses the prostate gland. - It does not undergo hyperplasia in BPH; rather, it encases the enlarging gland.

Q: Aspirin sensitive asthma is associated with:

Associated with nasal polyp. **Associated with nasal polyp** - **Aspirin-exacerbated respiratory disease (AERD)**, also known as aspirin-sensitive asthma, is characterized by a triad of **asthma**, **rhinosinusitis with nasal polyposis**, and respiratory reactions to **aspirin** and other NSAIDs [1]. - The presence of **nasal polyps** is a key clinical feature differentiating AERD from other forms of asthma [1]. *Obesity* - While **obesity** can exacerbate asthma severity, it is not specifically associated with the pathogenesis or diagnosis of **aspirin-sensitive asthma**. - It is a general risk factor for various health issues, including more severe asthma, but lacks specificity for AERD. *Extrinsic asthma* - **Extrinsic asthma** (allergic asthma) is typically triggered by environmental allergens and involves an **IgE-mediated response** [2]. - AERD is considered a **non-allergic** or **intrinsic asthma** phenotype, as it is not triggered by traditional allergens but by pharmacologic agents [1]. *Usually associated with urticaria* - **Urticaria** (hives) can be a feature of aspirin and NSAID sensitivity, particularly in some forms of **NSAID-induced urticaria/angioedema**. - However, the classic respiratory reactions of **aspirin-sensitive asthma** (bronchospasm, rhinitis) are distinct from urticarial reactions and typically do not present with primary urticaria.

Question 1

Which of the following conditions is NOT typically associated with low glucose levels in pleural fluid?

Accepted Answer

Dressler's syndrome

Answer

Malignant pleural effusion

Answer

Rheumatoid arthritis

Answer

Empyema

Question 2

Which vitamin deficiency is commonly associated with night blindness and other vision problems?

Accepted Answer

Vitamin A

Answer

Vitamin C

Answer

Vitamin E

Answer

Vitamin B12

Question 3

Casal's necklace is associated with the deficiency of:

Accepted Answer

Deficiency of Niacin (Vitamin B3)

Answer

Deficiency of Vitamin A

Answer

Deficiency of Iron

Answer

Deficiency of Vitamin B12

Question 4

Identify the condition given in the image below?

Accepted Answer

Chronic lymphedema

Answer

Cushing syndrome

Answer

Osteoporosis

Answer

None of the options

Question 5

A 50 year old male presents with fever and malaise for 4 months and pain in the knees and ankles. Blood tests are normal apart from a raised ESR. Chest x-ray shows bilateral hilar adenopathy and pulmonary infiltrates most severe in the upper and mid zones. Mantoux test is negative. What is the most likely diagnosis?

Accepted Answer

Sarcoidosis

Answer

Tuberculosis

Answer

Asbestosis

Answer

Berylliosis

Question 6

Which of the following exocrine glandular ducts are not obstructed in cystic fibrosis?

Accepted Answer

Sweat gland

Answer

Pancreas

Answer

Lung

Answer

None of the options

Question 7

Which of the following conditions is least likely to cause multiple painful ulcers on the tongue?

Accepted Answer

Sarcoidosis

Answer

TB

Answer

Herpes

Answer

Behcet disease

Question 8

Which of the following is a feature of crush syndrome -

Accepted Answer

Myoglobinuria

Answer

Hypocalcemia (low calcium levels)

Answer

Hyperphosphatemia (high phosphate levels)

Answer

Hyperkalemia (high potassium levels)

Question 9

Which zone of the prostate is primarily involved in Benign Prostatic Hyperplasia (BPH)?

Accepted Answer

Transitional zone

Answer

Central zone

Answer

Peripheral zone

Answer

Prostate capsule

Question 10

Aspirin sensitive asthma is associated with:

Accepted Answer

Associated with nasal polyp

Answer

Extrinsic asthma

Answer

Obesity

Answer

Usually associated with urticaria

Clinical Manifestations and Presentation of Diseases — MCQs

Clinical Manifestations and Presentation of Diseases — MCQs

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