Clinical Manifestations and Presentation of Diseases Practice Questions

Q: Which of the following conditions is most commonly associated with resorption of the distal phalanx?

Scleroderma. ***Scleroderma*** - **Scleroderma** (systemic sclerosis) can cause characteristic changes in the distal phalanges, specifically **acro-osteolysis**, leading to resorption of the **distal tufts** [1]. - This is often associated with **Raynaud's phenomenon**, **digital ischemia**, and **calcinosis**, leading to severe circulatory compromise in the digits [1]. *Hyperparathyroidism* - **Primary hyperparathyroidism** causes bone resorption due to increased parathyroid hormone, primarily affecting the **subperiosteal bone** (especially in the radial aspect of the middle phalanges), leading to a "lace-like" appearance on X-ray. - While it causes bone resorption, **distal phalanx tuft resorption** is not its most common or prominent skeletal feature compared to scleroderma. *Reiter's syndrome* - **Reiter's syndrome** (now known as reactive arthritis) is an inflammatory arthropathy usually involving large joints of the lower extremities in an **asymmetric** pattern. - It does not typically cause **resorption of the distal phalanx**; instead, it's associated with enthesitis, dactylitis, and periostitis. *Osteitis deformans (Paget's disease)* - **Paget's disease** is characterized by abnormal bone remodeling, leading to enlarged, deformed bones that are prone to fracture, predominantly affecting the **pelvis, spine, skull, and long bones**. - It causes areas of localized bone destruction and excessive bone formation, but **distal phalanx resorption** is not a feature of this condition.

Q: Which of the following is the most characteristic symptom of obstruction of the inferior vena cava?

Paraumblical dilatation. ***Paraumbilical dilatation*** - Obstruction of the **inferior vena cava (IVC)** leads to collateral circulation through superficial veins, especially around the umbilicus, causing **paraumbilical dilatation** (caput medusae). - This collateral flow bypasses the obstructed IVC to return blood to the superior vena cava system. *Thoraco-epigastric dilatation* - This pattern of collateral circulation is more characteristic of **superior vena cava (SVC) obstruction**, where blood from the upper body needs to bypass the SVC. - The dilated veins would typically be seen on the chest and upper abdomen, draining towards the femoral veins. *Oesophageal varices* - **Oesophageal varices** are typically caused by **portal hypertension** [1], often secondary to liver cirrhosis, not directly by IVC obstruction. - They represent portosystemic collateral veins, diverging from the portal system to the systemic circulation [1]. *Haemorrhoids* - **Haemorrhoids** are dilated veins in the anal canal, most commonly caused by **straining** during defecation or conditions that increase intra-abdominal pressure [2]. - While they can be a sign of portal hypertension [1], **IVC obstruction** is not their primary or most characteristic cause.

Q: Which of the following is not typically associated with cystic fibrosis?

Renal failure. ***Renal failure*** - **Renal failure** is not a typical manifestation or complication of **cystic fibrosis (CF)**. The CFTR protein primarily affects epithelial cells in organs like the lungs, pancreas, liver, and intestines, not the kidneys. - While CF patients may experience **electrolyte imbalances** due to excessive salt loss, this rarely progresses to **kidney failure** as a direct result of the disease itself. *Infertility* - **Infertility** is commonly associated with CF, particularly in males due to **congenital bilateral absence of the vas deferens (CBAVD)**, which is found in over 95% of male CF patients [1]. - In females, CF can cause **viscous cervical mucus** and nutritional deficiencies, leading to challenges with conception [1]. *Azoospermia* - **Azoospermia**, specifically **obstructive azoospermia**, is a direct consequence of **congenital bilateral absence of the vas deferens (CBAVD)**, which is highly prevalent in male CF patients [1]. - This condition prevents sperm from reaching the ejaculate, despite normal sperm production in the testes. *Nasal polyps* - **Nasal polyps** are a common feature in patients with **cystic fibrosis**, often leading to **chronic rhinosinusitis** and nasal obstruction. - This is due to the dysfunctional CFTR protein leading to abnormal mucus production and inflammation in the nasal passages [1].

Q: A young male patient presenting with LDL of 600 mg/dl and triglycerides of 160 mg/dl would most likely exhibit what finding on physical examination?

Tendon xanthoma. ***Tendon xanthoma*** - Markedly elevated **LDL (600 mg/dL)** with relatively normal triglycerides is characteristic of **familial hypercholesterolemia**, a condition frequently associated with **tendon xantomas**. [1] - **Tendon xanthomas** are cholesterol deposits commonly found in the Achilles tendons or extensor tendons of the hands due to chronic hypercholesterolemia. [1] *Lipemia retinalis* - **Lipemia retinalis** occurs when triglyceride levels are extremely high, typically above **1,000 mg/dL**, causing a whitish appearance of retinal blood vessels. [1] - The patient's triglyceride level of **160 mg/dL** is within the normal range and would not lead to lipemia retinalis. *Eruptive tuberous xanthomas* - **Eruptive tuberous xanthomas** are associated with very high triglyceride levels, often seen in severe **hypertriglyceridemia** (e.g., genetic lipoprotein lipase deficiency) or poorly controlled diabetes. - These are typically small, reddish-yellow papules appearing suddenly on extensor surfaces, which is not indicated by the patient's normal triglyceride level. *Xanthelasma* - **Xanthelasma** are yellowish plaques that occur on the eyelids, and while associated with hyperlipidemia, they are not specific to the severity or type of dyslipidemia presented. - They are more common in older adults and can occur even with normal lipid levels, making them less indicative of the specific lipid profile mentioned.

Q: Heerfordt's syndrome consists of fever, parotid enlargement, facial palsy, and which of the following?

Uveitis. ***Uveitis*** - **Heerfordt's syndrome** is a rare manifestation of **sarcoidosis**, classically characterized by a tetrad of symptoms: **fever**, **parotid gland enlargement**, **facial nerve palsy**, and **uveitis**. - **Uveitis** (inflammation of the uvea of the eye) is a key component differentiating this syndrome. *Fever* - **Fever** is one of the four defining components of Heerfordt's syndrome, but it is not the *missing* component being asked for in the question. - The question asks for the additional symptom that, along with the others listed, completes the syndrome. *Parotid enlargement* - **Parotid enlargement** (inflammation and swelling of the parotid glands) is another established component of Heerfordt's syndrome. - It's already mentioned in the question stem as one of the symptoms present. *Facial palsy* - **Facial palsy** (weakness or paralysis of the facial muscles, often unilateral) is also a classic feature of Heerfordt's syndrome. - This symptom is explicitly mentioned in the question as one of the presenting features.

Q: A chronic smoker presents with mild haemoptysis, and also reports a history of hypertension and obesity. Laboratory data reveal raised ACTH levels that are not suppressed by dexamethasone, leading to a diagnosis of Cushing's syndrome. Which of the following is the cause of Cushing's syndrome in this patient?

Ectopic ACTH secreting tumor. Ectopic ACTH secreting tumor - The combination of **hemoptysis** in a **chronic smoker** points towards a **lung tumor**, which can produce ACTH ectopically [1]. - **High ACTH** levels that are **not suppressed by dexamethasone** are characteristic of ectopic ACTH production, as these tumors are generally not regulated by the normal feedback mechanisms [1]. *MEN I* - **Multiple Endocrine Neoplasia type 1 (MEN I)** often includes pituitary tumors, but the presentation with hemoptysis and the specific lack of ACTH suppression point away from a pituitary-driven Cushing's. - MEN I is associated with tumors of the **parathyroid**, **pituitary**, and **pancreatic islet cells**, and while it can cause Cushing's, the **hemoptysis** is a strong differentiator. *Pituitary adenoma* - While a **pituitary adenoma** (Cushing's disease) causes ACTH-dependent Cushing's, the ACTH levels are typically **suppressed by high-dose dexamethasone**. - The patient's history of **hemoptysis** in a smoker strongly suggests a primary pulmonary pathology, not a pituitary tumor [1]. *Adrenal cortical adenoma* - An **adrenal cortical adenoma** causes **ACTH-independent Cushing's syndrome**, meaning ACTH levels would be **low or undetectable**, not elevated [1], [2]. - The primary problem in this case is high ACTH, ruling out adrenal adenoma as the direct cause of Cushing's syndrome [2].

Q: Kartagener's syndrome includes all of the following conditions except.

Cystic fibrosis. ***Cystic fibrosis*** - Cystic fibrosis is a genetic disorder affecting mucus and sweat glands, characterized by excessive secretions that lead to blockages in various organs, including the lungs and pancreas. This is a distinct condition from Kartagener's syndrome. - While both conditions can present with chronic respiratory infections, **cystic fibrosis** is caused by mutations in the **CFTR gene**, and is not a component of Kartagener's syndrome or primary ciliary dyskinesia [1]. *Situs inversus* - **Situs inversus** is a characteristic feature of Kartagener's syndrome, occurring in about 50% of affected individuals due to immotile cilia during embryonic development, leading to reversed organ placement. - The abnormal ciliary function prevents the proper rotation of organs during embryogenesis, resulting in **dextrocardia** and the transposition of abdominal organs. *Bronchiectasis* - **Bronchiectasis** is a common complication of Kartagener's syndrome, resulting from chronic inflammation and infection in the airways due to impaired mucociliary clearance. - The inability of cilia to effectively clear mucus and pathogens leads to recurrent infections, chronic inflammation, and irreversible dilation of the bronchi, a hallmark of **bronchiectasis** [1]. *Sinusitis* - **Sinusitis** is frequently observed in patients with Kartagener's syndrome because the dysfunctional cilia in the paranasal sinuses fail to clear mucus and trapped pathogens, leading to chronic inflammation and infection. - This chronic inflammation often presents as **recurrent or persistent sinus infections** and can be severe and difficult to treat due to the underlying ciliary defect.

Q: Which of the following conditions is characterized by the presence of telangiectasia?

Hereditary hemorrhagic telangiectasia. ***Hereditary hemorrhagic telangiectasia*** - This condition, also known as **Osler-Weber-Rendu disease**, is a **genetic disorder** resulting in abnormal blood vessel formation, leading to **telangiectasias** and arteriovenous malformations that can cause significant bleeding. - Key diagnostic criteria include spontaneous recurrent nosebleeds, multiple mucocutaneous telangiectasias, visceral organ involvement (e.g., pulmonary, hepatic, cerebral AVMs), and a family history. *Telangiectasia due to systemic sclerosis* - While telangiectasias can be a feature of **systemic sclerosis** (especially the limited cutaneous form, **CREST syndrome**), they are typically localized and are not the primary defining characteristic of the disease. - Systemic sclerosis is primarily characterized by **fibrosis of skin and internal organs**, and the telangiectasias are a secondary manifestation, not the fundamental underpinning of the condition as in HHT. *Telangiectasia due to rosacea* - **Rosacea** is a chronic inflammatory skin condition characterized by facial erythema, papules, pustules, and **telangiectasias**, particularly on the cheeks and nose. - However, rosacea-associated telangiectasias are localized to the face and are part of a broader inflammatory dermatological process, distinct from the systemic vascular abnormalities seen in HHT. *Acquired telangiectasia due to sun exposure* - **Sun exposure** can indeed cause **telangiectasias**, particularly on sun-damaged skin, due to chronic photodamage to dermal blood vessels. - These are generally localized, non-syndromic, and a result of environmental factors rather than a systemic or inherited disorder as seen in hereditary hemorrhagic telangiectasia.

Question 1

Which of the following conditions is most commonly associated with resorption of the distal phalanx?

Accepted Answer

Scleroderma

Answer

Hyperparathyroidism

Answer

Reiter's syndrome

Answer

Osteitis deformans (Paget's disease)

Question 2

Which of the following is a characteristic of Yellow-nail syndrome?

Accepted Answer

Pleural effusion and lymphedema, associated with discolored nails

Answer

Knee joint effusion and lymphedema, associated with discolored nails

Answer

Pericardial effusion and lymphedema, associated with discolored nails

Answer

Peritoneal effusion and lymphedema, associated with discolored nails

Question 3

Which of the following is the most characteristic symptom of obstruction of the inferior vena cava?

Accepted Answer

Paraumblical dilatation

Answer

Thoraco-epigastric dilatation

Answer

Haemorrhoides

Answer

Oesophageal varices

Question 4

Which of the following is not typically associated with cystic fibrosis?

Accepted Answer

Renal failure

Answer

Infertility

Answer

Azoospermia

Answer

Nasal polyps

Question 5

A young male patient presenting with LDL of 600 mg/dl and triglycerides of 160 mg/dl would most likely exhibit what finding on physical examination?

Accepted Answer

Tendon xanthoma

Answer

Lipemia retinalis

Answer

Eruptive tuberous xanthomas

Answer

Xanthelasma

Question 6

Heerfordt's syndrome consists of fever, parotid enlargement, facial palsy, and which of the following?

Accepted Answer

Uveitis

Answer

Facial palsy

Answer

Fever

Answer

Parotid enlargement

Question 7

A chronic smoker presents with mild haemoptysis, and also reports a history of hypertension and obesity. Laboratory data reveal raised ACTH levels that are not suppressed by dexamethasone, leading to a diagnosis of Cushing's syndrome. Which of the following is the cause of Cushing's syndrome in this patient?

Accepted Answer

Ectopic ACTH secreting tumor

Answer

MEN I

Answer

Pituitary adenoma

Answer

Adrenal cortical adenoma

Question 8

Kartagener's syndrome includes all of the following conditions except.

Accepted Answer

Cystic fibrosis

Answer

Situs inversus

Answer

Bronchiectasis

Answer

Sinusitis

Question 9

Which of the following conditions is characterized by the presence of telangiectasia?

Accepted Answer

Hereditary hemorrhagic telangiectasia

Answer

Telangiectasia due to systemic sclerosis

Answer

Telangiectasia due to rosacea

Answer

Acquired telangiectasia due to sun exposure

Question 10

For the following causes of sexual dysfunction, select the most likely clinical feature that can be caused by vascular disease.

Accepted Answer

failure of erection with absent nocturnal penile tumescence (NPT)

Answer

absence of orgasm with normal libido and erectile function

Answer

ejaculatory dysfunction

Answer

decreased libido

Clinical Manifestations and Presentation of Diseases — MCQs

Clinical Manifestations and Presentation of Diseases — MCQs

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