Clinical Manifestations and Presentation of Diseases Practice Questions

Q: Clinical examination of a symptomatic patient shows a Sister Mary Joseph nodule. It is most commonly associated with which of the following?

Stomach cancer. ***Stomach cancer*** - A **Sister Mary Joseph nodule** is a **periumbilical metastatic nodule**, most commonly associated with **gastric adenocarcinoma** due to its propensity for peritoneal spread. - While it can originate from other abdominal malignancies, stomach cancer is statistically the most frequent primary source of this metastatic sign. *Ovarian cancer* - Ovarian cancer can metasatasize to the peritoneum and sometimes cause Sister Mary Joseph nodules, but it is not the most common primary source [1]. - Instead, ovarian cancer more frequently presents with symptoms like **abdominal distension**, **pelvic pain**, or **ascites** [1]. *Colon cancer* - **Colorectal cancer** can also metastasize to the peritoneum, potentially leading to a Sister Mary Joseph nodule, though less commonly than gastric cancer [2]. - It often manifests with changes in **bowel habits**, **rectal bleeding**, or **unexplained weight loss** [2]. *Pancreatic cancer* - Pancreatic cancer can produce a Sister Mary Joseph nodule, particularly in advanced stages with **peritoneal dissemination**. - However, it is primarily known for other metastatic patterns and often presents with **jaundice** (if the head of the pancreas is affected) or **epigastric pain**.

Q: Blumberg's sign is

Rebound tenderness during abdominal palpation. ***Rebound tenderness during abdominal palpation*** - Blumberg's sign refers specifically to **rebound tenderness**, which is pain experienced upon the rapid release of pressure applied to the abdomen. - It is a classic sign indicating **peritoneal irritation** or inflammation, often seen in conditions like appendicitis. *Board-like rigidity of abdomen* - **Board-like rigidity** describes a state of involuntary abdominal muscle contraction, making the abdomen feel hard and inflexible. - This is a sign of **generalized peritonitis**, a more severe and widespread inflammation of the peritoneum than what typically elicits Blumberg's sign alone. *Pressure over left iliac fossa causing pain in right iliac fossa* - This describes **Rovsing's sign**, where palpation of the left lower quadrant causes pain in the right lower quadrant. - Rovsing's sign is another indicator of **peritoneal irritation** in the right lower quadrant and is commonly associated with appendicitis. *Pressure over right iliac fossa causing pain in left iliac fossa* - Applying pressure to the right iliac fossa usually causes pain in that same area if **appendicitis** is present (e.g., McBurney's point tenderness). - This specific pain pattern (pain in the left iliac fossa from right iliac fossa pressure) is not a recognized named sign for **abdominal pathology**.

Q: What is the ratio of pleural fluid protein to serum protein in transudative pleural effusion?

< 0.5. ***< 0.5*** - A pleural fluid protein to serum protein ratio of **less than 0.5** is a key criterion for defining a **transudative pleural effusion** according to Light's criteria [1]. - This low ratio indicates that the fluid accumulation is due to systemic factors affecting hydrostatic or oncotic pressures, rather than inflammation of the pleura causing increased capillary permeability [1], [2]. *< 0.3* - While a very low ratio might suggest a transudate, Light's criteria specifically set the threshold at **less than 0.5**, making < 0.3 an unnecessarily restrictive and less accurate cut-off [1]. - Using < 0.3 could lead to misclassification of some transudates as exudates, as the more inclusive < 0.5 criterion is widely accepted. *< 0.4* - This ratio is within the range that would be considered a transudate, but it is not the universally accepted and most specific cut-off point used in **Light's criteria** [1]. - Using < 0.4 instead of < 0.5 might still allow for misclassification in some cases, as the standard diagnostic threshold is less than 0.5. *< 0.6* - A ratio greater than or equal to **0.5** (including 0.6) typically indicates an **exudative pleural effusion**, where the fluid is high in protein due to local inflammation or malignancy [1]. - Therefore, a ratio of < 0.6 would encompass both transudates and some exudates, making it an incorrect and non-specific criterion for defining a transudate.

Q: Which condition is characterized by the presence of Kayser-Fleischer rings?

Wilson's disease. ***Wilson's disease*** - **Kayser-Fleischer rings** are a hallmark sign of Wilson's disease, caused by the deposition of **copper in the Descemet's membrane** of the cornea [1]. - This is a genetic disorder of **copper metabolism**, leading to excessive copper accumulation in various organs, including the liver, brain, and eyes [1]. *Von Gierke's disease* - This is a **glycogen storage disease (Type I)** characterized by a deficiency in **glucose-6-phosphatase**, leading to an inability to convert glycogen to free glucose. - Clinical features include **hypoglycemia**, hepatomegaly, and lactic acidosis, not copper accumulation or Kayser-Fleischer rings. *Phenylketonuria (PKU)* - PKU is an inherited metabolic disorder where the body cannot process **phenylalanine**, an amino acid, due to a deficiency of the enzyme **phenylalanine hydroxylase**. - Untreated PKU can lead to severe intellectual disability, but it does not involve copper metabolism or the formation of corneal rings. *Diabetes mellitus* - Diabetes mellitus is a metabolic disorder characterized by **high blood sugar levels** (hyperglycemia) resulting from defects in insulin secretion, insulin action, or both [2]. - Its complications affect various organs but do not include the deposition of copper in the cornea to form Kayser-Fleischer rings.

Q: All of the following can occur in rheumatic fever except?

Tricuspid regurgitation as the primary valve lesion. ***Tricuspid regurgitation as the primary valve lesion*** - While **rheumatic fever** can affect any heart valve, the **tricuspid valve** is rarely affected as the **primary or sole lesion**. - It is most commonly seen in conjunction with more severe **mitral and aortic valve disease**. *Mitral regurgitation* - **Mitral regurgitation** is a common manifestation of **acute rheumatic fever**, occurring due to **inflammation** of the valve leaflets and **chordae tendineae** [1]. - This leads to incompetence of the valve, causing blood to flow back into the left atrium during systole [1]. *Mitral stenosis* - **Mitral stenosis** is a classic **long-term complication** of **rheumatic fever**, typically developing years to decades after the initial acute episode. - Repeated inflammation and scarring lead to **thickening and fusion of the mitral valve leaflets**, restricting blood flow. *Pericarditis* - **Pericarditis**, inflammation of the **pericardium** (the sac surrounding the heart), is a possible manifestation of **rheumatic carditis** in acute rheumatic fever [1]. - It can cause chest pain and may be accompanied by a **pericardial effusion** [1].

Q: Carpal tunnel syndrome is caused by all, except?

Addison's disease. As specified in the choice-based analysis, carpal tunnel syndrome is caused by all except Addison's disease. ***Addison's disease*** - **Addison's disease** is characterized by primary adrenal insufficiency, leading to symptoms like fatigue, weight loss, and hypovolemia, but it is **not directly associated** with the development of carpal tunnel syndrome. - Carpal tunnel syndrome is caused by **compression of the median nerve** within the carpal tunnel, which is typically due to localized swelling or thickening of tissues, a mechanism not linked to Addison's disease. *Amyloidosis* - **Amyloidosis** can lead to the deposition of **amyloid protein** in various tissues, including the carpal tunnel, which can cause narrowing and compression of the median nerve [1]. - The accumulation of amyloid can result in **thickening of the synovium** and other structures within the wrist, leading to the symptoms of carpal tunnel syndrome [1]. *Hypothyroidism* - **Hypothyroidism** can cause the accumulation of **mucopolysaccharides** (specifically hyaluronic acid and chondroitin sulfate) in the interstitial tissues, including the synovium of the carpal tunnel. - This **fluid retention and tissue swelling** can increase pressure on the median nerve, leading to carpal tunnel syndrome. *Diabetes mellitus* - **Diabetes mellitus** is a common cause of carpal tunnel syndrome, primarily due to **neuropathy** and metabolic changes that affect the median nerve's health and the surrounding tissues. - High blood glucose levels can lead to **glycation of proteins** and increased **inflammation**, contributing to nerve swelling and tissue thickening within the carpal tunnel.

Q: Which condition is characterized by atrophic dry nasal mucosa, extensive encrustations, and a woody hard external nose?

Diabetes mellitus. ***Diabetes mellitus*** - While not directly causing nasal changes, uncontrolled **diabetes** can significantly impair general tissue health and immune response, contributing to chronic infections and slow healing in the nasal passages. - This can predispose individuals to severe **atrophic rhinitis** and secondary infections, leading to extensive encrustations and a "woody" induration of the external nose due to persistent inflammation and fibrosis. *Stargardt disease* - This is a form of inherited **macular degeneration** primarily affecting vision. - It has no known association with nasal mucosal changes, crusting, or external nasal induration. *Congenital syphilis* - Can cause "snuffles" in infants, which is a severe rhinitis with discharge and obstruction, and may lead to a **saddle nose deformity** due to cartilage destruction. - However, it does not typically present with the specific combination of **atrophic dry mucosa**, extensive encrustations, and a **woody hard external nose** as described in the adult presentation. *Rhinoscleroma* - Is a chronic granulomatous disease of the nose caused by the bacterium **Klebsiella rhinoscleromatis**, characterized by firm, rubbery, or woody nodules and progressive sclerosis. - Although it causes nasal deformity and obstruction, it initially presents with nasal discharge, crusting, and granuloma formation, not primarily **atrophic dry mucosa** and extensive encrustations across the entire nasal lining, especially in its later, fibrotic stages.

Q: Plasma cholinesterase levels are affected by various conditions. Which of the following conditions does not typically reduce plasma cholinesterase levels?

Chronic renal failure. ***Chronic renal failure*** - While chronic renal failure can cause various metabolic derangements, it does not typically lead to a significant **reduction in plasma cholinesterase levels**. - Plasma cholinesterase is primarily synthesized in the liver, and its levels are more directly impacted by conditions affecting **liver function** or **protein synthesis** [1]. *Pregnancy* - **Plasma cholinesterase levels** are known to decrease during normal pregnancy, particularly in the third trimester. - This reduction is thought to be due to **hormonal changes** and possibly increased plasma volume. *Liver disease* - Since plasma cholinesterase is synthesized in the **liver**, severe **liver disease** (e.g., cirrhosis, acute hepatitis) significantly impairs its production [1]. - This leads to a marked **reduction in circulating enzyme levels**, which can affect drug metabolism [1]. *Malnutrition* - **Severe malnutrition**, especially protein-calorie malnutrition, can lead to decreased synthesis of many proteins, including plasma cholinesterase. - This is because the body lacks the necessary **amino acids** for enzyme production.

Q: Which of the following is not considered a premalignant condition?

Hiatus hernia. ***Hiatus hernia*** - A **hiatus hernia** involves the protrusion of a part of the stomach into the chest through the **esophageal hiatus** in the diaphragm [1]. - While it can cause **gastroesophageal reflux disease (GERD)**, which is a risk factor for Barrett's esophagus, a hiatus hernia itself is not considered a premalignant condition [1]. *Barrett's esophagus* - **Barrett's esophagus** is a condition where the normal squamous epithelium of the lower esophagus is replaced by **columnar metaplasia**, which is a direct precursor to esophageal adenocarcinoma. - This change occurs due to chronic exposure to **acid reflux** in GERD, making it a significant premalignant condition. *Achalasia* - **Achalasia** is an esophageal motility disorder characterized by impaired relaxation of the lower esophageal sphincter and absence of peristalsis, leading to food retention. - Chronic inflammation and irritation from retained food and fluids significantly increases the risk of developing **esophageal squamous cell carcinoma**, hence it is a premalignant condition. *Plummer Vinson syndrome* - **Plummer-Vinson syndrome** is a **triad** of iron deficiency anemia, esophageal web, and dysphagia. - This syndrome is associated with an increased risk of developing **squamous cell carcinoma** of the esophagus and pharynx due to chronic irritation and inflammation, making it a premalignant condition.

Q: All statements about Plummer-Vinson syndrome are true except.

Commonly leads to carcinoma in lower third of oesophagus. ***Commonly leads to carcinoma in lower third of oesophagus*** - Plummer-Vinson syndrome is associated with an increased risk of **squamous cell carcinoma** of the **upper esophagus** (postcricoid region), not the lower third. - Adenocarcinoma, more common in the lower esophagus, is usually linked to Barrett's esophagus. *Common with iron deficiency* - **Iron deficiency anemia** is a hallmark feature and a prerequisite for diagnosing Plummer-Vinson syndrome. [1] - Iron deficiency is thought to contribute to the formation of esophageal webs and mucosal changes. *Common in females and associated with iron deficiency* - This syndrome predominantly affects **middle-aged women** who have long-standing, severe iron deficiency anemia. [1] - The gender predilection is a classic epidemiological characteristic of the syndrome. *Considered a premalignant condition for upper esophageal carcinoma* - Plummer-Vinson syndrome is recognized as a **premalignant condition**, increasing the risk of developing **squamous cell carcinoma** in the postcricoid region (upper esophagus). - Regular surveillance and iron supplementation are important due to this malignant potential.

Question 1

Clinical examination of a symptomatic patient shows a Sister Mary Joseph nodule. It is most commonly associated with which of the following?

Accepted Answer

Stomach cancer

Answer

Ovarian cancer

Answer

Colon cancer

Answer

Pancreatic cancer

Question 2

Blumberg's sign is

Accepted Answer

Rebound tenderness during abdominal palpation

Answer

Board-like rigidity of abdomen

Answer

Pressure over left iliac fossa causing pain in right iliac fossa

Answer

Pressure over right iliac fossa causing pain in left iliac fossa

Question 3

What is the ratio of pleural fluid protein to serum protein in transudative pleural effusion?

Accepted Answer

< 0.5

Answer

< 0.4

Answer

< 0.6

Answer

< 0.3

Question 4

Which condition is characterized by the presence of Kayser-Fleischer rings?

Accepted Answer

Wilson's disease

Answer

Von Gierke's disease

Answer

Phenylketonuria (PKU)

Answer

Diabetes mellitus

Question 5

All of the following can occur in rheumatic fever except?

Accepted Answer

Tricuspid regurgitation as the primary valve lesion

Answer

Mitral regurgitation

Answer

Mitral stenosis

Answer

Pericarditis

Question 6

Carpal tunnel syndrome is caused by all, except?

Accepted Answer

Addison's disease

Answer

Hypothyroidism

Answer

Diabetes mellitus

Answer

Amyloidosis

Question 7

Which condition is characterized by atrophic dry nasal mucosa, extensive encrustations, and a woody hard external nose?

Accepted Answer

Diabetes mellitus

Answer

Congenital syphilis

Answer

Stargardt disease

Answer

Rhinoscleroma

Question 8

Plasma cholinesterase levels are affected by various conditions. Which of the following conditions does not typically reduce plasma cholinesterase levels?

Accepted Answer

Chronic renal failure

Answer

Pregnancy

Answer

Liver disease

Answer

Malnutrition

Question 9

Which of the following is not considered a premalignant condition?

Accepted Answer

Hiatus hernia

Answer

Barrett's esophagus

Answer

Achalasia

Answer

Plummer Vinson syndrome

Question 10

All statements about Plummer-Vinson syndrome are true except.

Accepted Answer

Commonly leads to carcinoma in lower third of oesophagus

Answer

Common in females and associated with iron deficiency

Answer

Common with iron deficiency

Answer

Considered a premalignant condition for upper esophageal carcinoma

Clinical Manifestations and Presentation of Diseases — MCQs

Clinical Manifestations and Presentation of Diseases — MCQs

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