Clinical Manifestations and Presentation of Diseases Practice Questions

Q: All of the following are true about nephrotic syndrome except?

Decreased serum triglycerides. ***Decreased serum triglycerides*** - Nephrotic syndrome is characterized by **hyperlipidemia**, including **elevated total cholesterol** and **triglycerides**, due to increased hepatic synthesis of lipoproteins and decreased catabolism [1]. - This is a direct consequence of the body's attempt to compensate for low oncotic pressure and is a major diagnostic feature. *Hypoalbuminemia* - This is a **hallmark characteristic** of nephrotic syndrome, resulting from the significant loss of albumin in the urine [1]. - A low serum albumin level (typically 3.5 g/day* - This is the **defining diagnostic criterion** for nephrotic syndrome, indicating massive protein excretion through damaged glomerular capillaries [1]. - The protein loss is specifically defined as >3.5 grams per 1.73 m² of body surface area per day. *Increased risk of infection* - Patients with nephrotic syndrome are prone to infections, particularly **bacterial infections** like spontaneous bacterial peritonitis [1]. - This increased risk is due to the urinary loss of **immunoglobulins** (especially IgG), complement factors, and impaired cellular immunity [1].

Q: Most reliable indicator of some dehydration?

Thirst. Thirst - **Thirst** is a physiological response to even mild dehydration and is often the **earliest and most reliable indicator** that the body needs fluids [1], [2]. - It reflects an increase in **plasma osmolality**, signaling the brain to initiate fluid-seeking behaviors [1], [2]. *Lethargy* - **Lethargy** indicates more severe dehydration or other underlying conditions, making it a less specific and sensitive early indicator. - It suggests significant neurological impairment due to fluid and electrolyte imbalances, rather than just some dehydration. *Delayed skin pinch* - A **delayed skin pinch** (decreased skin turgor) is a sign of *significant* dehydration, indicating a substantial loss of interstitial fluid. - This sign is often less reliable in infants and the elderly due to differences in skin elasticity. *Sunken eyes* - **Sunken eyes** are a sign of more **moderate to severe dehydration**, reflecting significant fluid volume depletion, especially in infants. - It is not an early or subtle indicator of "some dehydration" but rather a late manifestation [3].

Q: All of the following are causes of ascites, EXCEPT:

Acute pancreatitis. ***Acute pancreatitis*** - While acute pancreatitis can cause fluid collections and sometimes **pancreatic ascites** [1] (due to pancreatic duct disruption), it is not a primary or common cause of generalized ascites. - The ascites seen in severe pancreatitis is typically **exudative** [1] and localized to the upper abdomen, distinct from the generalized **transudative** ascites often seen in other conditions. *Liver cirrhosis* - **Portal hypertension** due to cirrhosis leads to increased hydrostatic pressure in the splanchnic circulation, causing fluid to leak into the peritoneal cavity [1]. - Reduced **albumin synthesis** by the diseased liver also decreases plasma oncotic pressure, further contributing to fluid extravasation. *Peritoneal tuberculosis* - This condition causes inflammation of the peritoneum leading to increased **capillary permeability** and fluid exudation into the peritoneal cavity. - The ascites in peritoneal tuberculosis is typically **exudative** [1] and often accompanied by **abdominal pain**, fever, and weight loss. *Heart failure* - **Right-sided heart failure** leads to increased systemic venous pressure, which can cause congestion in the liver and elevated hepatic sinusoidal pressure. - This increased pressure forces fluid out of the hepatic sinusoids and into the peritoneal cavity, resulting in **cardiac ascites** [1].

Q: Which of the following is NOT a recognized complication of persistent vomiting?

Hyperglycemia. ***Hyperglycemia*** - Persistent vomiting generally leads to **fluid and electrolyte imbalances** and can even cause **hypoglycemia** due to poor oral intake, rather than hyperglycemia. - While stress can cause a transient increase in blood glucose, **persistent hyperglycemia** is not a direct or recognized primary complication of vomiting. *Hypokalemia* - Vomiting leads to the loss of gastric contents, including potassium, directly contributing to **hypokalemia** [1]. - Renal compensation for volume depletion can also lead to increased **potassium excretion** in the urine [1]. *Metabolic alkalosis* - The loss of **hydrochloric acid** from the stomach during vomiting causes a net gain of bicarbonate in the blood, leading to metabolic alkalosis [1]. - This is a hallmark electrolyte disturbance seen in patients with prolonged vomiting [1]. *Aspiration pneumonia* - Repeated vomiting increases the risk of inhaling gastric contents into the lungs, especially if the patient has a **depressed gag reflex** or is obtunded. - This can lead to **aspiration pneumonitis** or **pneumonia**, a serious pulmonary complication.

Q: All of the following are causes of chronic constipation EXCEPT which of the following?

Crohn’s disease. Crohn's disease - Crohn's disease is an inflammatory bowel disease that typically causes diarrhea, abdominal pain, and weight loss due to inflammation, most commonly in the small intestine and colon. - While strictures and small bowel obstruction can occur and lead to changes in bowel habits, chronic constipation is not a typical presenting symptom; diarrhea is far more common. Hypothyroidism - Decreased thyroid hormone levels lead to reduced metabolic rate, which can slow down gastrointestinal motility. [1] - This slowed colonic transit is a common cause of chronic constipation. [1] Diabetic neuropathy - Autonomic neuropathy affecting the gastrointestinal tract can impair coordination of intestinal muscle contractions and reduce colonic motility. [1] - This nerve damage can lead to gastroparesis and chronic constipation in diabetic patients. [1] Irritable bowel syndrome - Irritable bowel syndrome (IBS) is a functional gastrointestinal disorder characterized by recurrent abdominal pain associated with changes in bowel habits. - A significant subtype, IBS with constipation (IBS-C), presents with chronic constipation as a predominant symptom, often alternating with diarrhea or normal stools.

Q: Which of the following is the most common cause of peripheral edema in developed countries?

Venous insufficiency. ***Venous insufficiency*** - **Chronic venous insufficiency** is the most common cause of peripheral edema in developed countries due to frequent damage to venous valves from prolonged standing, obesity, and lack of exercise. - This condition leads to increased **hydrostatic pressure** in the capillaries, causing fluid to leak into the interstitial space. *Liver cirrhosis* - While liver cirrhosis can cause **peripheral edema** due to **hypoalbuminemia** and increased portal pressure, it is less common than venous insufficiency globally and in developed countries. - The edema in cirrhosis is often associated with other signs of liver failure, such as **ascites** and **jaundice**. *Congestive heart failure* - **Congestive heart failure** is a significant cause of peripheral edema, particularly in older populations, due to impaired cardiac output leading to fluid retention and increased venous pressures. - However, in the general population across developed countries, **venous insufficiency** is statistically more prevalent as a primary cause of isolated peripheral edema. *Chronic kidney disease* - **Chronic kidney disease** can cause **generalized edema** due to fluid overload and protein loss (in nephrotic syndrome), but it is not the most common single cause of peripheral edema. - Edema in CKD is often accompanied by **elevated creatinine** and other signs of renal dysfunction.

Q: Which of the following is a common cause of localized, non-pitting edema?

Lymphatic obstruction. ***Lymphatic obstruction*** - Lymphatic obstruction leads to the accumulation of protein-rich fluid in the interstitial space, commonly causing **non-pitting edema** [1]. - This type of edema is often **localized** to the area where lymphatic drainage is impaired, such as an arm after mastectomy [1]. *Congestive heart failure* - CHF typically causes **pitting edema**, often **bilateral and dependent** due to increased hydrostatic pressure [2], [4]. - It's usually associated with systemic symptoms like **dyspnea** and **orthopnea** [4]. *Nephrotic syndrome* - Nephrotic syndrome results in **generalized, pitting edema** due to significant proteinuria causing decreased oncotic pressure [2], [3]. - This edema often starts in **periorbital** regions and becomes more diffuse. *Liver cirrhosis* - Liver cirrhosis leads to **generalized edema**, particularly **ascites** (fluid in the peritoneal cavity) and lower extremity edema, primarily due to low albumin and portal hypertension. - This edema is usually **pitting** and widespread rather than localized and non-pitting.

Q: Which of the following conditions is NOT commonly associated with hemoptysis?

Aortic dissection. ***Aortic dissection*** - While an aortic dissection can present with severe chest pain and can be life-threatening, it typically **does not cause hemoptysis** as it involves the aorta, not the pulmonary vasculature or lung tissue. - Hemoptysis is the coughing up of blood from the respiratory tract, which is unrelated to the primary pathology of an aortic tear. *Goodpasture syndrome* - This is an **autoimmune disease** that attacks the **glomerular basement membrane** in the kidneys and the **pulmonary alveolar basement membrane** in the lungs. - Pulmonary hemorrhage, manifesting as **hemoptysis**, is a common and severe presentation due to damage to the alveolar capillaries. *Bronchiectasis* - Characterized by **permanent dilation of the bronchi** due to chronic inflammation and infection, leading to fragile and hypertrophied bronchial arteries. - These friable vessels are prone to bleeding, making **hemoptysis** a frequent symptom, ranging from blood-streaked sputum to massive hemorrhage. *Pulmonary embolism* - A **pulmonary embolism** involves a blockage in the pulmonary arteries, often leading to **pulmonary infarction** (tissue death) or hemorrhage. - The resulting tissue damage and inflammation can cause coughing up of blood, making **hemoptysis** a common, though not universal, symptom.

Q: Which of the following conditions is least likely to be associated with dyspnea?

Hypothyroidism. ***Hypothyroidism*** - While severe **hypothyroidism** can lead to respiratory muscle weakness or pleural effusions, **dyspnea** is not a primary or common symptom. - The metabolic rate is **decreased**, so the demand for oxygen is lower, making dyspnea less likely. *Asthma* - **Asthma** is characterized by **bronchoconstriction**, airway inflammation, and increased mucus production, leading to significant dyspnea, wheezing, and chest tightness [1]. - Patients often present with **recurrent episodes** of breathlessness, especially during triggers or exertion [1]. *Pneumonia* - **Pneumonia** involves inflammation and consolidation of the lung parenchyma, which impairs gas exchange and reduces lung compliance, resulting in **dyspnea**, cough, and hypoxemia. - The infection can lead to an increased **respiratory rate** and effort to maintain adequate oxygenation. *Myocardial infarction* - An **MI** causes damage to the heart muscle, impairing its pumping ability, and can lead to **acute heart failure** and **pulmonary edema**, which manifest as severe dyspnea [1], [2]. - The sudden decrease in cardiac output and subsequent fluid accumulation in the lungs directly contribute to the sensation of **shortness of breath** [2].

Q: Which of the following conditions is not associated with referred pain to the right shoulder?

Myocardial infarction. ***Myocardial infarction*** - While myocardial infarction can cause referred pain, it typically manifests as pain in the **left shoulder** and arm, chest, neck, or jaw [1]. - Pain referred to the right shoulder is not a classic presentation of myocardial infarction [1]. *Pneumonia involving the right lower lobe* - **Diaphragmatic irritation** due to inflammation from pneumonia can stimulate the phrenic nerve. - The **phrenic nerve** (C3-C5) shares sensory innervation with the shoulder, leading to referred pain. *Liver abscess* - A **liver abscess** can cause irritation of the **diaphragm** on the right side. - This diaphragmatic irritation is mediated by the **phrenic nerve**, resulting in referred pain to the right shoulder. *Acute cholecystitis* - Inflammation of the gallbladder in **acute cholecystitis** can irritate the **diaphragm**. - This irritation, transmitted via the **phrenic nerve**, commonly causes right shoulder pain.

Question 1

All of the following are true about nephrotic syndrome except?

Accepted Answer

Decreased serum triglycerides

Answer

Hypoalbuminemia

Answer

Proteinuria >3.5 g/day

Answer

Increased risk of infection

Question 2

Most reliable indicator of some dehydration?

Accepted Answer

Thirst

Answer

Lethargy

Answer

Delayed skin pinch

Answer

Sunken eyes

Question 3

All of the following are causes of ascites, EXCEPT:

Accepted Answer

Acute pancreatitis

Answer

Liver cirrhosis

Answer

Peritoneal tuberculosis

Answer

Heart failure

Question 4

Which of the following is NOT a recognized complication of persistent vomiting?

Accepted Answer

Hyperglycemia

Answer

Hypokalemia

Answer

Metabolic alkalosis

Answer

Aspiration pneumonia

Question 5

All of the following are causes of chronic constipation EXCEPT which of the following?

Accepted Answer

Crohn’s disease

Answer

Hypothyroidism

Answer

Diabetic neuropathy

Answer

Irritable bowel syndrome

Question 6

Which of the following is the most common cause of peripheral edema in developed countries?

Accepted Answer

Venous insufficiency

Answer

Liver cirrhosis

Answer

Congestive heart failure

Answer

Chronic kidney disease

Question 7

Which of the following is a common cause of localized, non-pitting edema?

Accepted Answer

Lymphatic obstruction

Answer

Congestive heart failure

Answer

Nephrotic syndrome

Answer

Liver cirrhosis

Question 8

Which of the following conditions is NOT commonly associated with hemoptysis?

Accepted Answer

Aortic dissection

Answer

Bronchiectasis

Answer

Goodpasture syndrome

Answer

Pulmonary embolism

Question 9

Which of the following conditions is least likely to be associated with dyspnea?

Accepted Answer

Hypothyroidism

Answer

Pneumonia

Answer

Myocardial infarction

Answer

Asthma

Question 10

Which of the following conditions is not associated with referred pain to the right shoulder?

Accepted Answer

Myocardial infarction

Answer

Pneumonia involving the right lower lobe

Answer

Liver abscess

Answer

Acute cholecystitis

Clinical Manifestations and Presentation of Diseases — MCQs

Clinical Manifestations and Presentation of Diseases — MCQs

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