Liver, Gallbladder and Biliary Tract — MCQs
CT scan of abdomen showing a structure branching within the liver. Identify the structure.
A surgeon removes a part of the liver located to the left of the falciform ligament. Which segments of the liver are removed?
An ultrasound examination shows dilated intrahepatic biliary channels with a small gallbladder. The most likely possibility is
A man on return from East Asia complains of pain in abdomen, jaundice, with increased alkaline phosphatase and conjugated hyperbilirubinemia. Ultrasound shows blockage in the biliary tree. What could be the cause?
Which of the following statements about the bare area of the liver is false?
Which of the following is least required for visualization of the gallbladder in oral cholecystography?
A patient comes with abdominal pain, jaundice, and portal hypertension. Anastomosis between which of the following veins is seen?
A patient presents with painless jaundice and a palpable gallbladder. What is the most likely diagnosis?
Cantlie's line is associated with which organ?
The left gastroepiploic artery is a branch of which artery?
Liver, Gallbladder and Biliary Tract Indian Medical PG Practice Questions and MCQs
Question 1: CT scan of abdomen showing a structure branching within the liver. Identify the structure.
- A. Portal vein (Correct Answer)
- B. Superior vena cava
- C. Inferior vena cava
- D. Splenic vein
Explanation: ***Portal vein*** - The image shows a **branching vessel within the liver parenchyma**. The **portal vein** enters the liver at the porta hepatis and branches extensively to supply the liver with nutrient-rich, deoxygenated blood from the gastrointestinal tract. - On a CT scan, the portal vein and its branches appear as prominent, contrast-filled structures centrally located within the liver, consistent with the identified structure. *Superior Vena Cava* - The **superior vena cava** is located in the **chest**, superior to the diaphragm, and drains blood from the upper body into the right atrium; it does not branch within the liver. - This vessel would not be visible in an abdominal CT slice at this level and does not show intrahepatic branching. *Inferior Vena Cava* - The **inferior vena cava (IVC)** is a large vessel located **posterior to the liver**, collecting deoxygenated blood from the lower body and liver (via hepatic veins) before emptying into the right atrium. - While it is in the abdomen, it does not branch within the liver parenchyma in the same manner as the portal vein; rather, **hepatic veins** drain into it from the liver. *Splenic Vein* - The **splenic vein** runs along the **posterior aspect of the pancreas** and eventually joins with the superior mesenteric vein to form the portal vein outside the liver. - It does not enter or branch within the liver itself; its location is too far posterior and outside the liver to match the structure indicated.
Question 2: A surgeon removes a part of the liver located to the left of the falciform ligament. Which segments of the liver are removed?
- A. Segments I & IV
- B. Segments V & VI
- C. Segments VII & VIII
- D. Segments II & III (Correct Answer)
Explanation: ***Segments II & III*** - The liver segments are defined by their **vascular supply** originating from the **portal vein** and **hepatic artery**, and their **biliary drainage** [1]. - The **falciform ligament** separates the **left lobe** of the liver into **medial** and **lateral** sections. The portion to its left corresponds to the lateral left lobe, which includes **segments II and III** [1, 2]. *Segments I & IV* - **Segment I** (`caudate lobe`) is located **posteriorly**, independent of the falciform ligament, and is supplied by both the left and right portal and hepatic arterial systems [1]. - **Segment IV** (`quadrate lobe`) is part of the **medial left lobe** and is situated to the **right of the falciform ligament** [1]. *Segments V & VI* - These segments are located in the **right lobe** of the liver, which is to the **right of the main portal fissure**, and are not associated with the falciform ligament's immediate left. - **Segment V** is **anterior** and **inferior**, and **Segment VI** is **posterior** and **inferior** within the right lobe. *Segments VII & VIII* - These segments are also located in the **right lobe** of the liver, specifically in the **superior** aspects [1]. - **Segment VII** is **posterior** and **superior**, while **Segment VIII** is **anterior** and **superior** in the right lobe, far from the falciform ligament.
Question 3: An ultrasound examination shows dilated intrahepatic biliary channels with a small gallbladder. The most likely possibility is
- A. Carcinoma of the head of the pancreas
- B. Pancreatic calculus
- C. Gallbladder stones
- D. Common bile duct stone (Correct Answer)
Explanation: ***Common bile duct stone*** - A **common bile duct (CBD) stone** obstructing flow can cause **intrahepatic biliary dilation** as bile backs up into the liver. - A **small, non-distended gallbladder** suggests that the obstruction is distal to the cystic duct, preventing bile entry into the gallbladder or causing it to contract in response to a partial obstruction. *Carcinoma of the head of the pancreas* - Pancreatic head carcinoma typically causes **Courvoisier's sign**, characterized by a **palpable, non-tender, distended gallbladder** due to chronic, progressive obstruction of the distal CBD. - While it causes intrahepatic ductal dilation, the gallbladder usually appears distended, not small. *Pancreatic calculus* - A pancreatic calculus typically causes **pancreatitis** or **pain**, and may lead to **dilation of the pancreatic duct**, not primarily the biliary tree. - Unless directly causing CBD obstruction, it would not explain dilated intrahepatic biliary channels with a small gallbladder. *Gallbladder stones* - **Gallbladder stones** typically cause **cholecystitis** or **biliary colic**, and if they obstruct the cystic duct, they can cause a **distended gallbladder**. - They do not typically cause widespread intrahepatic biliary dilation unless they migrate into the common bile duct and cause obstruction there.
Question 4: A man on return from East Asia complains of pain in abdomen, jaundice, with increased alkaline phosphatase and conjugated hyperbilirubinemia. Ultrasound shows blockage in the biliary tree. What could be the cause?
- A. Strongyloides
- B. Clonorchis sinensis (Correct Answer)
- C. Fasciola buski
- D. Ancylostoma
Explanation: ***Clonorchis sinensis*** - This parasitic fluke, common in East Asia, infects the **biliary ducts**, causing **cholangitis**, obstruction, and the symptoms described. - The combination of travel history, abdominal pain, jaundice, increased alkaline phosphatase, and conjugated hyperbilirubinemia, along with a blocked biliary tree on ultrasound, is highly suggestive of **clonorchiasis**. *Strongyloides* - This nematode primarily infects the **small intestine** and can cause abdominal pain, diarrhea, and malabsorption. - It does not typically cause biliary obstruction with jaundice and increased alkaline phosphatase. *Fasciola buski* - This fluke primarily infects the **small intestine** and causes symptoms like abdominal pain, diarrhea, and malabsorption, similar to Strongyloides. - While other Fasciola species (e.g., *F. hepatica*) can affect the biliary tree, *F. buski* is not known for causing biliary obstruction leading to jaundice. *Ancylostoma* - This hookworm primarily causes **iron-deficiency anemia** due to chronic blood loss in the intestines. - It does not typically cause symptoms related to biliary obstruction or jaundice.
Question 5: Which of the following statements about the bare area of the liver is false?
- A. It is circular in shape (Correct Answer)
- B. It is not a site of portocaval anastomosis
- C. Formed by the reflections of coronary ligaments
- D. Infection can spread from the abdominal to thoracic cavity at this area
Explanation: ***It is circular in shape*** - The bare area of the liver is **triangular** in shape, bordered by the reflections of the **coronary ligaments** and the inferior vena cava. [1] - Its shape is dictated by the anatomical arrangement of these peritoneal folds, making it distinctly non-circular. *Infection can spread from the abdominal to thoracic cavity at this area* - This statement is true because the bare area is the only part of the liver not covered by **peritoneum**, allowing direct contact between the liver and the diaphragm. [1] - This anatomical arrangement facilitates the spread of infections, like **subphrenic abscesses**, from the abdominal cavity to the posterior mediastinum and pleural cavity. [2] *It is not a site of portocaval anastomosis* - This statement is true; there is **no direct portosystemic shunt** at the bare area of the liver that becomes significant in portal hypertension. - While small veins connect the liver capsule to the diaphragm, these do not represent major portocaval anastomoses like those found at the gastroesophageal junction or rectum. *Formed by the reflections of coronary ligaments* - This statement is true; the bare area is specifically demarcated by the points where the **anterior and posterior layers of the coronary ligament** diverge, leaving a triangular region of the liver directly apposed to the diaphragm. [1] - The **coronary ligaments** are reflections of the peritoneum from the diaphragm onto the superior surface of the liver.
Question 6: Which of the following is least required for visualization of the gallbladder in oral cholecystography?
- A. Patency of cystic duct (Correct Answer)
- B. Motor mechanisms of gall bladder
- C. Ability to absorb water
- D. Functioning liver
Explanation: ***Patency of cystic duct*** - While a **patent cystic duct** is essential for bile to flow in and out of the gallbladder, the question asks what is *least* required for *visualization* of the gallbladder in oral cholecystography. - The contrast medium is absorbed, metabolized by the liver, and then concentrated in the gallbladder. The ability to concentrate is more critical for visualization than a patent cystic duct for this specific question. *Functioning liver* - A **functioning liver** is required to absorb the oral contrast agent from the intestine and then secrete it into the bile. - Without a functioning liver, the contrast agent cannot be processed and delivered to the gallbladder, making visualization impossible. *Motor mechanisms of gall bladder* - The **motor mechanisms** of the gallbladder are crucial for concentrating the bile and the contrast material. - The gallbladder absorbs water from the bile, increasing the concentration of the contrast agent, which enhances its visibility on X-ray. *Ability to absorb water* - The gallbladder's **ability to absorb water** from the bile is fundamental for concentrating the contrast medium. - This concentration process makes the gallbladder sufficiently radio-opaque to be visualized during oral cholecystography.
Question 7: A patient comes with abdominal pain, jaundice, and portal hypertension. Anastomosis between which of the following veins is seen?
- A. Left colic vein and middle colic veins
- B. Superior rectal and phrenic veins
- C. Sigmoid and superior rectal veins
- D. Esophageal veins and left gastric veins (Correct Answer)
Explanation: ***Esophageal veins and left gastric veins*** - This anastomosis is crucial in **portal hypertension**, as increased pressure in the **portal venous system** (e.g., due to liver cirrhosis) causes blood to back up into the **systemic venous circulation** through these collateral vessels. - This shunting creates **esophageal varices**, which can rupture and lead to life-threatening **upper gastrointestinal bleeding**, commonly presenting with **jaundice** and **abdominal pain** in liver disease. *Left colic vein and middle colic veins* - Both the left colic and middle colic veins are tributaries of the **inferior mesenteric vein** and **superior mesenteric vein**, respectively, and are part of the **portal system**. - While they form an anastomosis (via the **marginal artery of Drummond**), this connection is within the portal system and does not typically serve as a portosystemic shunt to decompress portal hypertension in the way esophageal varices do. *Superior rectal and phrenic veins* - The **superior rectal vein** drains into the **inferior mesenteric vein** (part of the portal system), and the **phrenic veins** drain into the **inferior vena cava** (part of the systemic system). - There is no direct significant portosystemic anastomosis between these two veins that would be clinically relevant in portal hypertension. *Sigmoid and superior rectal veins* - Both the **sigmoid veins** and the **superior rectal vein** are part of the **inferior mesenteric venous system**, which drains into the **portal circulation**. - While there are anastomoses between these veins within the mesenteric circulation, they are not a direct portosystemic shunt used to relieve pressure in portal hypertension causing the described symptoms.
Question 8: A patient presents with painless jaundice and a palpable gallbladder. What is the most likely diagnosis?
- A. Cholecystitis
- B. PSC
- C. Pancreatic cancer (Correct Answer)
- D. Hepatitis
Explanation: ***Pancreatic cancer*** - The combination of **painless jaundice** and a **palpable gallbladder** (Courvoisier's sign) is highly suggestive of an obstruction of the common bile duct, most commonly due to pancreatic head cancer. - The tumor in the head of the pancreas compresses the common bile duct, leading to bile back-up and distension of the gallbladder, which is often palpable and non-tender due to the slow, progressive nature of the obstruction. *Cholecystitis* - Cholecystitis typically presents with **painful right upper quadrant abdominal pain**, fever, and nausea, usually due to gallstone obstruction of the cystic duct. - While jaundice can occur if a stone migrates to the common bile duct, the prominent feature of **pain** and the common absence of a palpable, non-tender gallbladder differentiate it. *PSC* - **Primary sclerosing cholangitis (PSC)** is a chronic cholestatic liver disease characterized by progressive inflammation and fibrosis of the bile ducts, which can cause jaundice. - PSC typically doesn't present with a **palpable gallbladder**; it's often associated with inflammatory bowel disease and can lead to cholangitis or cholangiocarcinoma. *Hepatitis* - **Hepatitis** causes jaundice due to hepatocyte dysfunction and inflammation, leading to impaired bilirubin conjugation and excretion. - It usually presents with symptoms like fatigue, nausea, and dark urine, but it does **not typically cause a palpable gallbladder** because it's a hepatocellular rather than an obstructive process.
Question 9: Cantlie's line is associated with which organ?
- A. Liver (Correct Answer)
- B. Kidney
- C. Stomach
- D. Heart
Explanation: ***Liver*** - **Cantlie's line** is an imaginary line that runs from the gallbladder fossa to the inferior vena cava, dividing the **liver** into its functional right and left lobes [1]. - This anatomical landmark is crucial in **hepatic surgery** for planning resections and understanding segmental anatomy [1]. *Heart* - The heart's anatomy is described using landmarks like the sternum, ribs, and vertebral levels, but **Cantlie's line** is not relevant to its internal or external divisions. - Cardiac surgeons divide the heart into chambers and great vessels, not using a functional line like Cantlie's. *Kidney* - The kidney's anatomy is divided into a cortex and medulla, and externally into poles and borders, with no associated line called **Cantlie's line**. - Renal surgery relies on landmarks such as the renal hilum and vascular supply. *Stomach* - The stomach is divided into regions like the fundus, body, and pylorus, and its surgical anatomy is based on its curvatures and blood supply. - **Cantlie's line** has no anatomical or surgical relevance to the stomach.
Question 10: The left gastroepiploic artery is a branch of which artery?
- A. Hepatic artery
- B. Celiac artery
- C. Superior mesenteric artery
- D. Splenic artery (Correct Answer)
Explanation: ***Splenic artery*** - The **splenic artery** is a major branch of the **celiac trunk** that supplies the spleen, pancreas, and part of the stomach. - The **left gastroepiploic artery** (also known as the left gastro-omental artery) originates from the distal part of the splenic artery, near the splenic hilum. *Hepatic artery* - The **hepatic artery** (specifically the common hepatic artery) is a branch of the celiac trunk that primarily supplies the liver, pylorus of the stomach, and part of the duodenum. - It gives rise to the **right gastric artery** and the **gastroduodenal artery**, but not the left gastroepiploic artery. *Celiac artery* - The **celiac artery** (also known as the celiac trunk) is the first major anterior branch of the abdominal aorta, supplying the foregut organs. - It branches into three main arteries: the **left gastric artery**, **splenic artery**, and **common hepatic artery**, but the left gastroepiploic artery is a *secondary* branch off one of these. *Superior mesenteric artery* - The **superior mesenteric artery (SMA)** is a major anterior branch of the abdominal aorta that arises just inferior to the celiac trunk. - It primarily supplies the **midgut** structures, including the small intestine (jejunum and ileum), ascending colon, and proximal two-thirds of the transverse colon, and does not supply the stomach's greater curvature.
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