Jaundice and Cholestasis — MCQs

10 questions

A patient presents with jaundice, dark urine, and high unconjugated bilirubin. Most likely cause?

MRP 2 and conjugated hyperbilirubinemia associated with which of the following?

A patient presents with unconjugated hyperbilirubinemia and the presence of urobilinogen in urine. Which of the following is the least likely diagnosis?

Intrahepatic cholestasis is seen in -

Micronodular cirrhosis is seen in all except:

Which of the following is a major feature of Alagille syndrome?

What is the most common nodule found in the liver?

What is a Klatskin tumor?

In a patient presenting with jaundice, the HIDA scan would be most useful for which of the following:

Q10

A 10-year-old female presents with pain in the right hypochondrium, fever, jaundice, and a palpable mass. The probable diagnosis is?

Jaundice and Cholestasis Indian Medical PG Practice Questions and MCQs

Question 1: A patient presents with jaundice, dark urine, and high unconjugated bilirubin. Most likely cause?

A. Biliary obstruction
B. Hemolytic anemia (Correct Answer)
C. Viral hepatitis
D. Pancreatic obstruction

Explanation: ***Hemolytic anemia*** - **Hemolytic anemia** leads to increased destruction of red blood cells, overwhelming the liver's capacity to conjugate bilirubin [1]. - This results in a buildup of **unconjugated bilirubin**, causing **jaundice** and **dark urine** due to increased urobilinogen [2]. *Biliary obstruction* - **Biliary obstruction** typically causes an increase in **conjugated bilirubin** because the liver has conjugated it but cannot excrete it [2]. - Patients usually present with **pale stools** (acholic stools) due to the absence of bilirubin in the intestines, which is not mentioned here [1]. *Viral hepatitis* - **Viral hepatitis** can cause both conjugated and unconjugated hyperbilirubinemia, but it primarily affects the liver's ability to process and excrete bilirubin, leading to a predominance of **conjugated bilirubin** in most clinical presentations [1]. - It would often present with elevated liver enzymes (AST, ALT), which is not mentioned as a primary finding. *Pancreatic obstruction* - **Pancreatic obstruction**, especially of the head of the pancreas, can cause **biliary obstruction** by compressing the common bile duct. - This would result in elevated **conjugated bilirubin** and **pale stools**, similar to other causes of biliary obstruction.

Question 2: MRP 2 and conjugated hyperbilirubinemia associated with which of the following?

A. Criggler Najjar syndrome type II
B. Dubin Johnson syndrome (Correct Answer)
C. Rotor syndrome
D. Criggler Najjar syndrome type I

Explanation: ***Dubin Johnson syndrome*** - It is characterized by a defect in the **MRP2 (multidrug resistance-associated protein 2)** transporter, which is responsible for the excretion of **conjugated bilirubin** and other organic anions from hepatocytes into bile. - This defect leads to the accumulation of conjugated bilirubin in the liver and its regurgitation into the bloodstream, causing **conjugated hyperbilirubinemia** [2]. *Criggler Najjar syndrome type II* - This syndrome involves a partial deficiency of **UDP-glucuronosyltransferase 1A1 (UGT1A1)**, the enzyme responsible for conjugating bilirubin [1]. - It results in primarily **unconjugated hyperbilirubinemia**, not conjugated. *Rotor syndrome* - Rotor syndrome also presents with **conjugated hyperbilirubinemia** but is characterized by impaired hepatic uptake and storage of conjugated bilirubin, rather than a defect in the MRP2 transporter. - Unlike Dubin-Johnson, it does not involve the characteristic **black liver** pigmentation. *Criggler Najjar syndrome type I* - This is a severe, complete deficiency of **UDP-glucuronosyltransferase 1A1 (UGT1A1)**, leading to profound **unconjugated hyperbilirubinemia** and often requiring phototherapy or liver transplantation [1]. - It is not associated with defects in the MRP2 transporter or conjugated bilirubin metabolism.

Question 3: A patient presents with unconjugated hyperbilirubinemia and the presence of urobilinogen in urine. Which of the following is the least likely diagnosis?

A. Gilbert's syndrome
B. Dubin Johnson syndrome (Correct Answer)
C. Crigler Najjar syndrome
D. Hemolytic Jaundice

Explanation: ***Dubin Johnson syndrome*** - This syndrome primarily causes **conjugated hyperbilirubinemia** due to a defect in bilirubin excretion from hepatocytes. - The presence of **unconjugated hyperbilirubinemia** and **urobilinogen** in urine makes Dubin-Johnson syndrome the least likely diagnosis. *Crigler Najjar syndrome* - This is a rare genetic disorder characterized by **unconjugated hyperbilirubinemia** due to a severe deficiency or absence of the enzyme **uridine diphosphate-glucuronosyltransferase (UGT1A1)**. - While it causes unconjugated hyperbilirubinemia, the presence of **urobilinogen** indicates some bilirubin conjugation and excretion into the gut, making this less likely than other causes of unconjugated hyperbilirubinemia with urobilinogen. *Gilbert's syndrome* - This common, mild genetic disorder causes **unconjugated hyperbilirubinemia** due to reduced activity of the **UGT1A1 enzyme**, leading to decreased bilirubin conjugation. - Since some conjugation still occurs, the presence of **urobilinogen** (formed from conjugated bilirubin in the gut) is consistent with this diagnosis. *Hemolytic Jaundice* - **Hemolysis** leads to an increased breakdown of red blood cells, producing a large amount of **unconjugated bilirubin** that overwhelms the liver's conjugating capacity. - The liver still conjugates some of this bilirubin, which is then excreted into the gut, leading to increased **urobilinogen** formation and excretion in urine.

Question 4: Intrahepatic cholestasis is seen in -

A. Hypercalcemia
B. All of the options
C. Galactosemia
D. Haemochromatosis (Correct Answer)

Explanation: ***Haemochromatosis*** - **Haemochromatosis** is a hereditary disorder characterized by excessive iron absorption and deposition in multiple organs, including the liver [1]. - Iron accumulation in **hepatocytes** causes direct cellular injury and can lead to **intrahepatic cholestasis** as one of its hepatic manifestations [1]. - The progressive iron overload leads to **hepatic fibrosis** and eventually **cirrhosis**, with cholestatic features often present due to hepatocellular dysfunction [1]. - Clinical presentation includes hepatomegaly, elevated liver enzymes, and signs of chronic liver disease including cholestasis. *Galactosemia* - **Galactosemia** is an inherited metabolic disorder affecting galactose metabolism, leading to accumulation of galactose-1-phosphate. - While it causes significant **hepatocellular damage** and can progress to cirrhosis, the primary hepatic manifestation is **hepatocellular injury** rather than cholestasis. - The liver pathology typically shows fatty infiltration, hepatomegaly, and cirrhosis, but **intrahepatic cholestasis is not a characteristic feature** of galactosemia. *Hypercalcemia* - **Hypercalcemia** does not cause **intrahepatic cholestasis** as a primary manifestation. - Its hepatic effects are minimal and typically related to systemic complications or calcification, not direct cholestatic liver disease. *All of the options* - This option is incorrect because only **haemochromatosis** among these conditions is characteristically associated with intrahepatic cholestasis. - Neither galactosemia nor hypercalcemia typically present with cholestasis as a primary hepatic feature. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 854-855.

Question 5: Micronodular cirrhosis is seen in all except:

A. Hemochromatosis
B. Chronic extrahepatic biliary obstruction
C. Chronic hepatitis B (Correct Answer)
D. Alcoholic liver disease

Explanation: ***Chronic hepatitis B*** - **Chronic hepatitis B** typically leads to **macronodular cirrhosis**, characterized by large, irregularly sized regenerative nodules separated by broad fibrous septa. - The liver architecture in macronodular cirrhosis is severely disrupted, with nodules often exceeding 3 mm in diameter. *Alcoholic liver disease* - **Alcoholic liver disease** commonly progresses to **micronodular cirrhosis**, which features small, uniformly sized regenerative nodules (typically <3 mm) surrounded by delicate fibrous septa [1]. - This pattern is due to the sustained effect of alcohol on hepatocytes and stellate cells, leading to continuous fibrosis. *Hemochromatosis* - **Hemochromatosis**, particularly advanced stages, often results in **micronodular cirrhosis** due to the progressive deposition of iron in hepatocytes, which causes chronic injury and fibrogenesis [1]. - The widespread iron deposition promotes diffuse fibrosis and the formation of numerous small regenerative nodules. *Chronic extrahepatic biliary obstruction* - **Chronic extrahepatic biliary obstruction** leads to **biliary cirrhosis**, which is typically **micronodular** in its early stages. - Prolonged cholestasis causes inflammation and periductal fibrosis, leading to the formation of small nodules and a characteristic "hobnail" appearance of the liver surface. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 388-396.

Question 6: Which of the following is a major feature of Alagille syndrome?

A. Bile duct paucity (Correct Answer)
B. IHBR dilation
C. PBC
D. PSC

Explanation: ***Bile duct paucity*** - **Bile duct paucity** is a hallmark histologic finding in Alagille syndrome, leading to **cholestasis** and liver disease. - This results from the reduced number of **intrahepatic bile ducts**, which are crucial for bile flow. *IHBR dilation* - **Intrahepatic biliary radical (IHBR) dilation** is characteristic of biliary obstruction, which is not the primary feature of Alagille syndrome. - Alagille syndrome is primarily a genetic condition leading to **hypoplasia or paucity** of bile ducts, not dilation. *PBC* - **Primary Biliary Cholangitis (PBC)** is an autoimmune disease primarily affecting **small intrahepatic bile ducts**, leading to their destruction and fibrosis [1]. - It is typically seen in middle-aged women and is characterized by **antimitochondrial antibodies (AMA)**, which are not features of Alagille syndrome. *PSC* - **Primary Sclerosing Cholangitis (PSC)** is a chronic cholestatic liver disease characterized by **inflammation and fibrosis** of both intrahepatic and extrahepatic bile ducts [2]. - PSC is strongly associated with **inflammatory bowel disease (IBD)** and **ANCA positivity**, which are distinct from the genetic basis and features of Alagille syndrome [2]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 864-865. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 865-866.

Question 7: What is the most common nodule found in the liver?

A. Hepatic adenoma
B. Focal nodular hyperplasia
C. Hemangioma (Correct Answer)
D. Cholangiocarcinoma

Explanation: ***Hemangioma*** - **Hemangiomas** are the most common benign tumors of the liver, occurring in up to 20% of the population [1]. - They are typically asymptomatic and are often discovered incidentally on imaging studies. *Hepatic adenoma* - **Hepatic adenomas** are benign liver tumors that are less common than hemangiomas and are strongly associated with oral contraceptive use [1]. - They carry a risk of hemorrhage and malignant transformation, which is not characteristic of the most common liver nodule [1]. *Focal nodular hyperplasia* - **Focal nodular hyperplasia (FNH)** is a benign liver lesion characterized by a central scar and normal hepatocellular function, but it is less common than hemangiomas [2]. - While it is the second most common benign liver tumor after hemangioma, it does not surpass hemangioma in overall prevalence [2]. *Cholangiocarcinoma* - **Cholangiocarcinoma** is a malignant tumor of the bile ducts and is a relatively rare and aggressive form of liver cancer [3]. - It is a primary malignancy and is not categorized as the most common nodule found in the liver, which refers to benign lesions in this context [2]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, p. 874. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 398-399. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 875-876.

Question 8: What is a Klatskin tumor?

A. Fibrolamellar hepatocellular carcinoma
B. Gall bladder carcinoma
C. Hepatocellular carcinoma
D. Hilar cholangiocarcinoma (Correct Answer)

Explanation: ***Nodular type of cholangiocarcinoma*** - Klatskin tumors are a specific form of **cholangiocarcinoma** occurring at the junction of the left and right hepatic bile ducts [1]. - These tumors are characterized by **biliary obstruction** and often present with **jaundice** as a prominent clinical feature. *Fibrolamellar hepatocellular carcinoma* - This is a variant of **hepatocellular carcinoma** known for its fibrous stroma, distinct from Klatskin tumors which arise from bile ducts. - **Fibrolamellar** is more common in younger patients and typically does not cause **biliary obstruction** characteristic of Klatskin tumors. *Gall bladder carcinoma* - Gall bladder carcinoma originates from the **gallbladder epithelium**, not the bile ducts, differentiating it from Klatskin tumors. - It may present with symptoms such as **abdominal pain** and **weight loss**, rather than the specific obstructive jaundice seen in Klatskin cases. *Hepatocellular carcinoma* - This cancer arises directly from hepatocytes and is unrelated to bile duct tumors like Klatskin tumors. - Commonly linked to **chronic liver disease** and liver cirrhosis, it does not typically present with **obstructive jaundice** as seen in cholangiocarcinomas [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 880-881.

Question 9: In a patient presenting with jaundice, the HIDA scan would be most useful for which of the following:

A. Biliary atresia (Correct Answer)
B. Cholelithiasis
C. Benign biliary disease
D. Bile duct carcinoma

Explanation: ***Biliary atresia*** - A **HIDA scan** (hepatobiliary iminodiacetic acid scan) is instrumental in diagnosing biliary atresia by demonstrating the **absence of bile flow** into the duodenum. - In infants with persistent jaundice, the failure of the tracer to appear in the small bowel after a prolonged period strongly suggests this condition, indicating **obstructed or absent bile ducts**. *Cholelithiasis* - While HIDA scans can detect **cystic duct obstruction** in acute cholecystitis, they are less definitive for uncomplicated cholelithiasis (gallstones without acute inflammation). - **Ultrasound** is typically the primary imaging modality for diagnosing gallstones due to its non-invasiveness and ability to visualize stones directly. *Benign biliary disease* - This is a broad category, and while a HIDA scan can assess bile flow, it's not the **primary diagnostic tool** for all benign biliary conditions. - For most benign biliary diseases (e.g., choledocholithiasis without acute cholecystitis), **ultrasound, ERCP, or MRCP** often provide more detailed anatomical information. *Bile duct carcinoma* - A HIDA scan might show **obstructed bile flow** in bile duct carcinoma (cholangiocarcinoma), but it does not provide the detailed anatomical information or staging necessary for diagnosis and treatment planning. - **CT, MRI, MRCP, or ERCP** with biopsy are far more effective for identifying, characterizing, and staging bile duct malignancies.

Question 10: A 10-year-old female presents with pain in the right hypochondrium, fever, jaundice, and a palpable mass. The probable diagnosis is?

A. Hepatitis
B. Hepatoma
C. Mucocele gallbladder
D. Choledochal cyst (Correct Answer)

Explanation: ***Choledochal cyst*** - The classic triad of pain, jaundice, and a palpable abdominal mass in a child is highly suggestive of a **choledochal cyst**. - This condition involves congenital dilatation of the **bile ducts**, leading to bile stasis, potential infection, and obstruction. *Hepatitis* - While **jaundice** and **abdominal pain** can be present in hepatitis, a distinct palpable mass is not a typical feature unless there's severe hepatomegaly, and fever is also variable. - Hepatitis is primarily an inflammatory condition of the liver, not characterized by a mass resulting from ductal dilation. *Hepatoma* - **Hepatoma (liver cancer)** is rare in a 10-year-old and would more commonly present with a growing mass, weight loss, and possibly jaundice and pain, but the triad of symptoms strongly points away from it as the primary diagnosis. - While a mass would be present, the acute presentation with jaundice and fever is less typical for a primary liver tumor in this age group without other risk factors. *Mucocele gallbladder* - A **mucocele of the gallbladder** presents as a palpable mass due to gallbladder distension, but it is typically not associated with **jaundice** unless there is severe obstruction of the common bile duct, which is rarely primary. - The pain would be localized to the right hypochondrium, but the full triad including jaundice and fever (suggesting infection, e.g., cholangitis within the cyst) points away from a simple mucocele.

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