Hepatobiliary Surgery Practice Questions

Q: A 60-year-old diabetic man is admitted to the hospital with a diagnosis of acute cholecystitis. The white blood cell count is 28,000, and a plain film of the abdomen and computed tomography scan show evidence of intramural gas in the gallbladder. What is the most likely diagnosis?

Emphysematous gallbladder. ***Emphysematous gallbladder*** - The presence of **intramural gas** in the gallbladder wall, along with signs of **acute cholecystitis** and a high WBC count in a diabetic patient, is highly characteristic of emphysematous cholecystitis. - This severe form of cholecystitis is caused by gas-forming organisms, often seen in older, diabetic, or immunocompromised patients. *Acalculous cholecystitis* - This condition is **acute inflammation of the gallbladder** without the presence of gallstones, often seen in critically ill patients. - While it can be severe, it does not typically present with **intramural gas** as a primary diagnostic feature unless complicated by gas-forming organisms, which would then lead to emphysematous cholecystitis. *Cholangiohepatitis* - This refers to inflammation of the **bile ducts and liver parenchyma**, often presenting with fever, jaundice, and RUQ pain, but less commonly with gallbladder wall thickening or intramural gas. - Diagnosis usually requires evidence of **intrahepatic or extrahepatic bile duct dilation** or stones, which are not described here. *Sclerosing cholangitis* - This is a chronic, progressive cholestatic liver disease characterized by **inflammation and fibrosis of the bile ducts**, leading to strictures. - It presents with symptoms like **pruritus, fatigue, and jaundice**, and a diagnosis is typically made by cholangiography showing "beading" of the bile ducts; it does not involve intramural gallbladder gas.

Q: Splenectomy is most useful in:

Hereditary spherocytosis. ***Hereditary spherocytosis*** - Splenectomy is a definitive treatment for **hereditary spherocytosis** as it removes the primary site where abnormally shaped **spherocytes** are selectively destroyed. - While it does not cure the genetic defect, it significantly reduces **hemolysis** and **anemia**, improving quality of life. *Thrombocytopenia* - Splenectomy can be considered for certain types of **immune thrombocytopenia (ITP)** that are refractory to medical therapy, but it is not the most common or initial treatment. - In ITP, the spleen is a major site of **platelet destruction** and **antibody production**, making splenectomy a potential option in selected cases. *Henoch-Schönlein purpura* - **Henoch-Schönlein purpura** (now known as **IgA vasculitis**) is a **self-limiting vasculitis** that primarily affects small blood vessels and typically resolves with supportive care. - Splenectomy plays no role in the management of **Henoch-Schönlein purpura** as the pathophysiology does not involve splenic dysfunction or destruction of blood cells. *Sickle cell anemia* - Splenectomy is generally **contraindicated** in **sickle cell anemia** patients beyond early childhood, as most older patients experience **autosplenectomy** due to recurrent sickling and infarction. - In very young children, splenectomy might be considered for recurrent **splenic sequestration crises**, but this is not a common or universally applied treatment.

Q: What is the treatment of choice for extrahepatic portal thrombosis?

Splenorenal shunt. ***Splenorenal shunt*** - A **distal splenorenal shunt (DSRS)**, or **Warren shunt**, is the preferred **surgical shunt procedure** for managing **portal hypertension** in **extrahepatic portal vein thrombosis (EHPVT)**. - This procedure connects the **splenic vein** to the **left renal vein**, bypassing the obstructed portal vein and decompressing **gastroesophageal varices** while attempting to preserve hepatopetal flow. - **When used:** Second-line therapy when endoscopic management fails or as definitive surgical management in selected cases. - **Advantage:** Selectively decompresses varices while maintaining some mesenteric flow to the liver, reducing risk of hepatic encephalopathy compared to total shunts. *Mesocaval shunt* - Connects the **superior mesenteric vein** to the **inferior vena cava (IVC)**. - Less preferred for EHPVT due to higher **thrombosis rates**, technical complexity, and complete diversion of portal flow. *Portocaval shunt* - Connects the **portal vein** directly to the **inferior vena cava**. - Generally avoided in EHPVT because it completely diverts all portal blood flow away from the liver, leading to **hepatic encephalopathy** and impaired liver function. - Creates a **total (non-selective) shunt** with higher morbidity. *Mesorenal shunt* - Connects the **superior mesenteric vein** to the **left renal vein**. - Rarely performed; does not offer advantages over distal splenorenal shunt and is technically more challenging. **Note:** Modern management of EHPVT emphasizes **endoscopic variceal ligation** and medical therapy as first-line treatment, with **Meso-Rex bypass (Rex shunt)** increasingly preferred when surgical intervention is needed as it restores physiological portal flow. Traditional shunts like DSRS are now reserved for cases where these options are not feasible.

Q: Which of the following statements is true regarding gallbladder carcinoma?

90% associated with gallstones. 90% associated with gallstones - The vast majority of gallbladder carcinomas are linked to **gallstone disease**, which is considered a major risk factor due to chronic inflammation [2]. - This strong association highlights the role of prolonged irritation in the development of malignancy in the gallbladder. *Most commonly presents with abdominal pain and weight loss* - While **abdominal pain** and **weight loss** can be symptoms, they are non-specific and often present at advanced stages [1]. - Earlier symptoms might include **jaundice** or **right upper quadrant discomfort**, but these are also often vague [1]. *5-year survival is approximately 25%* - The overall 5-year survival rate for gallbladder carcinoma is significantly lower, typically ranging from **5-10%**, making it one of the more lethal cancers. - The poor prognosis is often due to late diagnosis, as symptoms usually appear when the disease is already advanced and has metastasized; death typically occurs within 1 year in symptomatic patients [1]. *30% are squamous cell carcinoma* - The vast majority of gallbladder carcinomas (approximately **90%**) are **adenocarcinomas**. - Squamous cell carcinoma and other rare types represent only a small minority of cases.

Q: What is the best treatment advice for a 69-year-old male patient with coronary artery disease and asymptomatic gallbladder stones, who has no history of biliary colic or jaundice?

Observation without surgery for gallbladder stones. ***Observation without surgery for gallbladder stones*** - For **asymptomatic gallbladder stones**, especially in patients with **coronary artery disease** (which increases surgical risk), observation is the recommended approach [1]. The risk of developing symptoms or complications (e.g., cholecystitis, cholangitis, pancreatitis) is low (1-2% per year), and the risks of surgery generally outweigh the benefits [1]. - Due to the patient's age (69 years) and existing **coronary artery disease**, avoiding elective surgery reduces the risk of perioperative cardiac events and other surgical complications. *Open cholecystectomy* - This is an **invasive surgical procedure** with higher risks of postoperative pain, infection, and longer recovery compared to laparoscopic cholecystectomy. - It is generally reserved for complicated cases or when laparoscopic surgery is contraindicated, which is not indicated here given the asymptomatic nature of the stones. *Laparoscopic cholecystectomy* - While less invasive than over surgery, it is still a **surgical procedure carrying inherent risks**, including those related to general anesthesia and potential complications like bile duct injury or bleeding. - Elective surgery for asymptomatic gallstones is generally not recommended as the potential benefits do not outweigh the procedural risks, especially in a patient with significant comorbidities like **coronary artery disease**. *ERCP and removal of gallbladder stones* - **ERCP (Endoscopic Retrograde Cholangiopancreatography)** is a procedure primarily used to visualize and address issues within the bile ducts and pancreatic duct, such as common bile duct stones. - It is **not used for removing stones directly from the gallbladder** itself and is an invasive procedure with risks like pancreatitis, perforation, and bleeding, making it inappropriate for asymptomatic gallbladder stones.

Q: Which of the following is least likely to be a cause of cholecystitis?

Estrogen. ### Estrogen - While **estrogen** can contribute to the formation of gallstones (cholelithiasis) by increasing cholesterol secretion into bile, it is **least directly implicated** as a primary cause of cholecystitis itself [1]. - Cholecystitis is primarily caused by **gallstone obstruction** of the cystic duct or, less commonly, by acalculous inflammation [1]. ### OCP - **Oral contraceptive pills (OCPs)** contain estrogen, which is a known risk factor for the formation of **gallstones**, leading to cholelithiasis [1]. - Gallstones are the most common cause of **acute cholecystitis** due to obstruction of the cystic duct [1]. ### Diabetes mellitus - **Diabetes mellitus** increases the risk of gallstone formation due to **impaired gallbladder motility** and changes in bile composition. - Diabetic patients are also at higher risk for severe cholecystitis and complications, including **gangrenous cholecystitis** or emphysematous cholecystitis [1]. ### Obesity - **Obesity** is a significant risk factor for the development of **cholesterol gallstones** due to increased cholesterol synthesis and secretion into bile [1]. - The presence of gallstones, or cholelithiasis, is the primary predisposing factor for **acute cholecystitis** [1].

Q: Which of the following statements about Hepatocellular carcinoma (HCC) is true?

It is the most common primary tumor of the liver.. ***It is the most common primary tumor of the liver.*** - **Hepatocellular carcinoma (HCC)** accounts for the vast majority of primary liver cancers, making it the most common type. - Its prevalence is particularly high in regions with a high incidence of **chronic hepatitis B and C** and **cirrhosis**, which are major risk factors. *It is resectable in a significant percentage of cases.* - Unfortunately, most HCC cases are diagnosed at an **advanced stage**, rendering only a minority (typically 10-30%) suitable for **surgical resection** [1]. - **Liver transplantation** and other locoregional therapies are considered for patients who do not qualify for resection or as bridges to transplant. *More than 70% of cases show an elevated AFP.* - While **alpha-fetoprotein (AFP)** is a useful tumor marker for HCC, it is elevated in only about **50-70% of cases**, and its sensitivity varies significantly [1]. - A normal AFP level does not rule out HCC, and elevation can also be seen in other liver conditions and germ cell tumors. *USG-guided aspiration biopsy is the primary method for diagnosis.* - The diagnosis of HCC often relies on characteristic radiological findings (e.g., **arterial hyperenhancement** with venous washout on CT or MRI) in patients with cirrhosis, making biopsy unnecessary in many instances [1]. - **Biopsy** is typically reserved for atypical lesions or when radiological findings are not definitive, due to the risk of tumor seeding and potential patient complications.

Q: Which of the following factors does not enhance stone formation in the gallbladder?

Vagal stimulation. Vagal stimulation - Vagal stimulation promotes **gallbladder contraction**, aiding in the expulsion of gallstones rather than their formation [1]. - It decreases bile stasis and helps maintain **biliary flow**, reducing the risk of stone formation [1]. *Cholestyramine therapy* - Cholestyramine binds bile acids, leading to **increased cholesterol saturation** in bile, which can contribute to stone formation. - It can cause **bile acid malabsorption**, thus increasing biliary cholesterol levels and promoting **gallstone development**. *Ileal resection* - Resection of the ileum results in reduced bile salt reabsorption, leading to **increased cholesterol levels** in the bile and a higher risk of gallstones. - This condition can produce a **bile acid deficiency**, which induces stone formation due to supersaturation of cholesterol [2]. *Clofibrate therapy* - Clofibrate, a fibrate drug, can increase **cholesterol excretion** in bile, contributing to **gallstone formation**. - It raises the liver's cholesterol output and alters the biliary lipid composition to favor the development of cholesterol stones.

Q: Most common site for impaction of gallstones in gallstone ileus is:

Terminal ileum. ***Terminal ileum*** - The **terminal ileum** is the narrowest part of the small bowel, making it the most common site for **gallstone impaction** in gallstone ileus. - Due to a combination of its relatively small lumen and its position at the **end of the small intestine**, large gallstones are most likely to become lodged here, causing obstruction. *First part of duodenum* - The **duodenum**, especially the first part, has a relatively **wide lumen** and is typically not a site of impaction for gallstones causing ileus. - While the fistula often forms here, the stone usually **passes distally** without obstruction at this point. *Second part of duodenum* - Similar to the first part, the **second part of the duodenum** is wide and designed for chyme propulsion, making impaction here less common. - Gallstones typically move quickly through the duodenum into the **jejunum** and **ileum**. *Colon* - The **colon** has a much larger diameter than the small intestine, making gallstone impaction unlikely unless the stone is exceptionally large or there is pre-existing stricture. - Though very rarely, a gallstone may pass into the colon via a **cholecystocolonic fistula**, but obstruction is still rare due to the wide lumen.

Question 1

A 60-year-old diabetic man is admitted to the hospital with a diagnosis of acute cholecystitis. The white blood cell count is 28,000, and a plain film of the abdomen and computed tomography scan show evidence of intramural gas in the gallbladder. What is the most likely diagnosis?

Accepted Answer

Emphysematous gallbladder

Answer

Acalculous cholecystitis

Answer

Cholangiohepatitis

Answer

Sclerosing cholangitis

Question 2

Splenectomy is most useful in:

Accepted Answer

Hereditary spherocytosis

Answer

Thrombocytopenia

Answer

Sickle cell anemia

Answer

Henoch-Schönlein purpura

Question 3

What is the treatment of choice for extrahepatic portal thrombosis?

Accepted Answer

Splenorenal shunt

Answer

Mesorenal shunt

Answer

Portocaval shunt

Answer

Mesocaval shunt

Question 4

Which of the following statements is true regarding gallbladder carcinoma?

Accepted Answer

90% associated with gallstones

Answer

30% are squamous cell carcinoma

Answer

5-year survival is approximately 25%

Answer

Most commonly presents with abdominal pain and weight loss

Question 5

What is the best treatment advice for a 69-year-old male patient with coronary artery disease and asymptomatic gallbladder stones, who has no history of biliary colic or jaundice?

Accepted Answer

Observation without surgery for gallbladder stones

Answer

Open cholecystectomy

Answer

Laparoscopic cholecystectomy

Answer

ERCP and removal of gallbladder stones

Question 6

Which of the following is least likely to be a cause of cholecystitis?

Accepted Answer

Estrogen

Answer

OCP

Answer

Diabetes mellitus

Answer

Obesity

Question 7

Which of the following statements about Hepatocellular carcinoma (HCC) is true?

Accepted Answer

It is the most common primary tumor of the liver.

Answer

It is resectable in a significant percentage of cases.

Answer

More than 70% of cases show an elevated AFP.

Answer

USG-guided aspiration biopsy is the primary method for diagnosis.

Question 8

Which of the following factors does not enhance stone formation in the gallbladder?

Accepted Answer

Vagal stimulation

Answer

Ileal resection

Answer

Cholestyramine therapy

Answer

Clofibrate therapy

Question 9

Most common site for impaction of gallstones in gallstone ileus is:

Accepted Answer

Terminal ileum

Answer

Colon

Answer

Second part of duodenum

Answer

First part of duodenum

Hepatobiliary Surgery — MCQs

Hepatobiliary Surgery — MCQs

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