Biliary Tract Disorders — MCQs
In a patient with acute cholecystitis, referred pain to the shoulder is known as
A middle-aged woman presents to her physician with fatigue, pruritus, and steatorrhea. Further studies demonstrate primary biliary cholangitis and the presence of antimitochondrial antibodies. If left untreated, this patient is also at increased risk of developing which of the following?
What is the most common primary component of gallstones?
Which of the following factors contributes to the formation of cholesterol gallstones?
Which of the following is not a common symptom associated with common bile duct (CBD) stones?
A patient of biliary colic presented to hospital. Intern gave an injection and the pain worsened. Which is the most likely injection given?
In the Bismuth-Corlette classification, which type involves the hepatic duct confluence WITHOUT extension into secondary intrahepatic ducts?
Which of the following statements about nutcracker esophagus is correct?
Most common type of choledochal cyst is:
A 50-year-old male patient presented with left -sided hemiparesis. Damage to which part of the internal capsule leads to this presentation?
Biliary Tract Disorders Indian Medical PG Practice Questions and MCQs
Question 1: In a patient with acute cholecystitis, referred pain to the shoulder is known as
- A. Murphy's sign
- B. Gray Turner sign
- C. Boas' sign (Correct Answer)
- D. Cullen's sign
Explanation: ***Boas' sign*** - **Boas' sign** refers to the presence of hyperesthesia below the right scapula, which can also manifest as referred pain to the **right shoulder** or back [1]. - This symptom in acute cholecystitis is due to the **irritation** of the **phrenic nerve**, which shares sensory pathways with the shoulder region. *Murphy's sign* - **Murphy's sign** is elicited by asking the patient to exhale, then placing the examiner's hand below the costal margin on the right mid-clavicular line, and then asking the patient to inhale deeply [1]. - A positive sign is indicated by a sudden cessation of inspiration due to pain, which is specific for **acute cholecystitis** and not referred shoulder pain [1]. *Gray Turner sign* - The **Gray Turner sign** involves ecchymosis or discoloration of the flanks. - It is a severe indicator of **retroperitoneal hemorrhage**, often associated with acute pancreatitis, not cholecystitis [2]. *Cullen's sign* - **Cullen's sign** presents as periumbilical ecchymosis or discoloration around the navel. - This sign is also indicative of **retroperitoneal hemorrhage**, typically seen in serious conditions like ruptured ectopic pregnancy or acute pancreatitis.
Question 2: A middle-aged woman presents to her physician with fatigue, pruritus, and steatorrhea. Further studies demonstrate primary biliary cholangitis and the presence of antimitochondrial antibodies. If left untreated, this patient is also at increased risk of developing which of the following?
- A. Increased serum cholesterol levels due to cholestasis (Correct Answer)
- B. Severe respiratory failure
- C. Decreased serum uric acid levels
- D. Increased serum pyruvic acid levels
Explanation: ***Markedly increased serum cholesterol*** - Patients with **primary biliary cholangitis** (PBC) often have **cholestasis** leading to elevated cholesterol levels due to impaired bile salt excretion. - Untreated PBC can progress, increasing the risk of **hyperlipidemia**, including markedly elevated serum cholesterol levels, evidenced by xanthomatous deposits [1]. *Markedly increased serum pyruvic acid* - Increased serum pyruvic acid typically indicates issues with **glycolysis** or **liver metabolism**, which are not primary complications of PBC. - This condition is more associated with **lactic acidosis** or certain genetic disorders, not directly related to the severe cholestatic picture seen in this patient. *Markedly decreased PaO2* - Markedly decreased **PaO2** suggests respiratory failure or severe lung disease, not a complication of cholestatic liver disease. - This does not typically correlate with PBC, where the main concerns are liver function and metabolism, not oxygenation. *Markedly decreased serum uric acid* - Decreased serum uric acid is typically seen in conditions like **chronic liver disease**, but it is not a hallmark of PBC or its complications. - PBC is more associated with **autoimmune disorders** [1] rather than metabolic alterations affecting uric acid levels in this context.
Question 3: What is the most common primary component of gallstones?
- A. Cholesterol (Correct Answer)
- B. Calcium
- C. Phosphate
- D. Bilirubin
Explanation: ***Cholesterol*** - **Cholesterol gallstones** account for about 80% of all gallstones in Western countries [1]. - They form when there is an imbalance in the components of bile, specifically an excess of cholesterol compared to bile salts and phospholipids [1], [2]. *Calcium* - While calcium salts (like **calcium bilirubinate** or **calcium carbonate**) can be components of gallstones, they are usually found in mixed stones or as a minor component [2]. - **Pure calcium stones** are rare. *Phosphate* - **Phosphate** is not a primary component of gallstones. - It is more commonly associated with kidney stones (**calcium phosphate stones**) rather than gallstones. *Bilirubin* - **Bilirubin** is the primary component of **pigment gallstones** (black or brown stones), which account for about 15-20% of gallstones [1]. - These are typically associated with conditions causing **hemolysis** or **bacterial infection** in the biliary tract [3]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, p. 882. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 403-404. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 882-883.
Question 4: Which of the following factors contributes to the formation of cholesterol gallstones?
- A. Hyper cholesterolemia
- B. Decreased motility of Gall bladder
- C. Hypo secretion of bile salts
- D. All of the options (Correct Answer)
Explanation: ***All of the options*** - **Decreased gallbladder motility** leads to bile stasis, causing cholesterol to precipitate and form large crystals [1]. - **Hyposecretion of bile salts** reduces the solubilizing capacity of bile, leading to supersaturation of cholesterol [2]. *Decreased motility of Gall bladder* - Poor motility results in incomplete emptying of the gallbladder, allowing bile to reside for longer periods [1]. - This stasis promotes the nucleation and growth of **cholesterol crystals** into macroscopic stones [1]. *Hyposecretion of bile salts* - **Bile salts** are crucial for keeping cholesterol in solution; their reduced concentration makes bile supersaturated with cholesterol [2]. - This supersaturation allows cholesterol to precipitate out of solution, initiating stone formation [2]. *Hyper cholesterolemia* - While **high serum cholesterol** does not directly cause gallstones, it can increase the amount of cholesterol secreted into bile [1]. - An increase in biliary cholesterol, especially in relation to bile salts and phospholipids, leads to **cholesterol supersaturation** of bile and stone formation [2].
Question 5: Which of the following is not a common symptom associated with common bile duct (CBD) stones?
- A. Fever
- B. Jaundice
- C. Pain
- D. Septic shock (Correct Answer)
Explanation: ***Septic shock*** - While **sepsis** can occur as a complication of **cholangitis** due to CBD stones, **septic shock** itself is a severe, life-threatening systemic response and not a *common symptom* directly associated with the presence of uncomplicated CBD stones. - It represents a late, severe complication of infection rather than an initial or typical presentation. *Pain* - **Biliary colic** due to obstruction of the **cystic duct** or **common bile duct** (CBD) by stones is a very common symptom, manifesting as acute, intense pain in the upper abdomen. - This pain is often felt in the **right upper quadrant** or epigastrium and can radiate to the back or shoulder. *Fever* - **Fever** is a common symptom, particularly when **CBD stones** lead to **cholangitis**, an infection of the bile duct. - The obstruction caused by the stone allows bacterial proliferation, leading to inflammation and systemic symptoms like fever. *Jaundice* - **Jaundice** due to **hyperbilirubinemia** is a frequent symptom when a CBD stone obstructs the flow of bile from the liver into the intestine. - This obstruction prevents the excretion of **conjugated bilirubin**, leading to its build-up in the blood and deposition in tissues, causing yellowing of the skin and eyes.
Question 6: A patient of biliary colic presented to hospital. Intern gave an injection and the pain worsened. Which is the most likely injection given?
- A. Morphine (Correct Answer)
- B. Diclofenac
- C. Etoricoxib
- D. Nefopam
Explanation: *Morphine*- **Morphine** and other opioids can cause **spasm of the sphincter of Oddi**, leading to increased pressure in the **biliary tree** and worsening of biliary colic.- This effect is mediated through **mu-opioid receptors** on the smooth muscle of the sphincter.*Diclofenac*- **Diclofenac** is a non-steroidal anti-inflammatory drug (NSAID) which is an excellent choice for **biliary colic** because it reduces inflammation and relaxes smooth muscle.- It works by inhibiting **prostaglandin synthesis**, thus reducing pain and spasm of the gallbladder.*Etoricoxib*- **Etoricoxib** is a selective COX-2 inhibitor [1], another type of NSAID, which would typically alleviate pain in biliary colic.- It reduces inflammation and pain [1] without the **sphincter of Oddi spasm** concerns associated with opioids.*Nefopam*- **Nefopam** is a non-opioid analgesic that acts as a centrally acting **serotonin-norepinephrine-dopamine reuptake inhibitor (SNDRI)**. It would typically help with pain relief.- It is not known to cause **sphincter of Oddi spasm** and would therefore not usually worsen biliary colic.
Question 7: In the Bismuth-Corlette classification, which type involves the hepatic duct confluence WITHOUT extension into secondary intrahepatic ducts?
- A. Type II (Correct Answer)
- B. Type IIIb
- C. Type I
- D. Type IV
- E. Type IIIa
- F. Type III
Explanation: ***Type II*** - This classification specifically describes **cholangiocarcinomas** located at the **hepatic duct confluence** without extension into secondary intrahepatic ducts. - **Type II tumors** involve the hepatic duct confluence but **do not extend** into the right or left secondary intrahepatic ducts. - This is the defining feature that distinguishes Type II from Type III variants. *Type I* - **Type I tumors** are located at least **2 cm distal to the hepatic duct bifurcation**. - This type involves the **common hepatic duct** and **spares the confluence** completely. - Does not meet the criteria of involving the confluence. *Type IIIa* - **Type IIIa tumors** involve the **hepatic duct confluence** with extension into the **right secondary intrahepatic ducts**. - This represents extension **beyond** the confluence, unlike Type II. - The extension into secondary ducts is the key differentiating feature. *Type IIIb* - **Type IIIb tumors** involve the **hepatic duct confluence** with extension into the **left secondary intrahepatic ducts**. - This represents extension **beyond** the confluence, unlike Type II. - The extension pattern differs from Type IIIa by involving the left rather than right system.
Question 8: Which of the following statements about nutcracker esophagus is correct?
- A. There are no effective medical treatments available.
- B. It is a type of esophageal cancer.
- C. It is a benign condition with no symptoms.
- D. It is characterized by excessively strong peristaltic contractions causing chest pain and dysphagia. (Correct Answer)
Explanation: ***It is characterized by excessively strong peristaltic contractions causing chest pain and dysphagia.*** - Nutcracker esophagus is a **motility disorder** defined by **high-amplitude, prolonged peristaltic contractions** in the distal esophagus [1]. - These powerful contractions can lead to **severe chest pain**, which may mimic angina, and **dysphagia** (difficulty swallowing) [1]. *There are no effective medical treatments available.* - This statement is incorrect as several medical treatments, including **calcium channel blockers**, **nitrates**, and **tricyclic antidepressants**, can help manage symptoms by reducing esophageal spasm [1]. - **Botulinum toxin injection** into the esophageal muscles and **surgical myotomy** are also options for refractory cases. *It is a type of esophageal cancer.* - Nutcracker esophagus is a **functional motility disorder** and **not a malignant condition**; it does not involve cancerous growth. - While it can cause symptoms similar to cancer (e.g., dysphagia), it is fundamentally different in its pathology. *It is a benign condition with no symptoms.* - While nutcracker esophagus is generally considered **benign** (not life-threatening), it is **often symptomatic**, causing significant **chest pain** and **dysphagia**, which can severely impact a patient's quality of life [1]. - The symptoms can be bothersome and require treatment, contradicting the idea of no symptoms.
Question 9: Most common type of choledochal cyst is:
- A. Type II
- B. Type III
- C. Type IV
- D. Type I (Correct Answer)
Explanation: ***Type I*** - **Type I choledochal cyst** is the most common type, accounting for **80-90%** of all cases. - It involves a **fusiform dilatation** of the extrahepatic bile duct. *Type II* - **Type II choledochal cysts** are rare and present as a **diverticulum** arising from the common bile duct. - This type has a very different morphological appearance compared to the more common fusiform dilatation. *Type III* - **Type III choledochal cysts**, also known as **choledochoceles**, are dilatations within the duodenal wall near the **ampulla of Vater**. - They are much less common than Type I cysts and have a distinct anatomic location. *Type IV* - **Type IV choledochal cysts** involve **multiple dilatations** of the bile ducts, which can be extrahepatic, intrahepatic, or both. - While more complex, they are less prevalent than the single, fusiform dilatation seen in Type I cysts.
Question 10: A 50-year-old male patient presented with left -sided hemiparesis. Damage to which part of the internal capsule leads to this presentation?
- A. Anterior limb
- B. Posterior limb (Correct Answer)
- C. Retrolentiform
- D. Sublentiform
Explanation: Posterior limb - The posterior limb of the internal capsule contains the corticospinal tracts, which carry motor commands from the brain to the spinal cord [1]. - Damage to this area typically results in contralateral hemiparesis or hemiplegia, matching the patient's left-sided weakness. Anterior limb - The anterior limb of the internal capsule primarily contains tracts connecting the thalamus to the frontal lobe and the pontine nuclei to the cerebellum. - Lesions here typically cause dysarthria or behavioral changes, not hemiparesis. Retrolentiform - The retrolentiform part of the internal capsule carries visual (optic radiation) and auditory pathways. - Damage to this area would primarily cause contralateral visual field deficits or auditory agnosia, not motor weakness. Sublentiform - The sublentiform part of the internal capsule contains auditory radiations and temporopontine fibers. - Injury here would result in auditory symptoms or potentially aphasia if dominant hemisphere is affected, not hemiparesis.
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