UPSC-CMS 2021 — Anatomy

Q: Which of the following are probable sites for Ectopic pancreas? 1. Submucosa of the stomach and duodenum 2. Liver 3. Small bowel mesentery 4. Splenic hilum

1, 2 and 3. Correct: 1, 2 and 3 - The **submucosa of the stomach and duodenum** is the most common site for ectopic pancreatic tissue (25-40% of cases). - Ectopic pancreas can also be found in the **liver** and **small bowel mesentery**, though less frequently than in the upper gastrointestinal tract. - These three locations represent the well-recognized probable sites for ectopic pancreatic tissue. *Incorrect: 1, 2 and 4* - This option incorrectly includes the **splenic hilum**, which is not a recognized typical site for ectopic pancreas. - While ectopic pancreatic tissue can occur in various abdominal locations, the splenic hilum is not among the probable sites. *Incorrect: 2, 3 and 4* - This option omits the **submucosa of the stomach and duodenum**, which is the most frequent site for ectopic pancreas. - This makes the option incomplete as it misses the primary location for this condition. *Incorrect: 1, 3 and 4* - This option omits the **liver** as a probable site for ectopic pancreatic tissue. - While the liver is less common than the stomach or duodenum, it is a recognized location for ectopic pancreas. [Practice more Anatomy PYQs on OnCourse]

Q: Which one of the following statements regarding Cantlie's line is correct?

Runs between gall bladder fossa and middle hepatic vein. ***Runs between gall bladder fossa and middle hepatic vein*** - **Cantlie's line** is an imaginary plane that divides the **functional left and right lobes of the liver** [1]. - This line extends from the **gallbladder fossa anteriorly** to the groove for the **inferior vena cava posteriorly**, functionally aligned with the **middle hepatic vein** [1], [3]. *Runs between gall bladder fossa and right hepatic vein* - The **right hepatic vein** typically lies further to the right, dividing the **right anterior and right posterior segments** of the liver [3]. - Cantlie's line is specifically defined by the **major fissure** where the **middle hepatic vein** resides [1]. *Runs between gall bladder fossa and right branch of portal vein* - The **portal vein branches** are located deeper within the liver parenchyma and indicate segmental anatomy rather than the primary functional division [1], [2]. - Cantlie's line is defined by the **major fissure (middle hepatic vein)**, not a portal vein branch [1]. *Runs between gall bladder fossa and left branch of portal vein* - The **left portal vein branch** supplies the functional left lobe and is not involved in defining the primary plane between the functional right and left lobes [1]. - This anatomical landmark relates to the **middle hepatic vein** and the **gallbladder fossa** [1]. [Practice more Anatomy PYQs on OnCourse]

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Which of the following are probable sites for Ectopic pancreas? 1. Submucosa of the stomach and duodenum 2. Liver 3. Small bowel mesentery 4. Splenic hilum

Which one of the following statements regarding Cantlie's line is correct?

UPSC-CMS 2021 - Anatomy UPSC-CMS Practice Questions and MCQs

Question 1: Which of the following are probable sites for Ectopic pancreas? 1. Submucosa of the stomach and duodenum 2. Liver 3. Small bowel mesentery 4. Splenic hilum

A. 1, 2 and 4
B. 2, 3 and 4
C. 1, 3 and 4
D. 1, 2 and 3 (Correct Answer)

Explanation: Correct: 1, 2 and 3 - The **submucosa of the stomach and duodenum** is the most common site for ectopic pancreatic tissue (25-40% of cases). - Ectopic pancreas can also be found in the **liver** and **small bowel mesentery**, though less frequently than in the upper gastrointestinal tract. - These three locations represent the well-recognized probable sites for ectopic pancreatic tissue. *Incorrect: 1, 2 and 4* - This option incorrectly includes the **splenic hilum**, which is not a recognized typical site for ectopic pancreas. - While ectopic pancreatic tissue can occur in various abdominal locations, the splenic hilum is not among the probable sites. *Incorrect: 2, 3 and 4* - This option omits the **submucosa of the stomach and duodenum**, which is the most frequent site for ectopic pancreas. - This makes the option incomplete as it misses the primary location for this condition. *Incorrect: 1, 3 and 4* - This option omits the **liver** as a probable site for ectopic pancreatic tissue. - While the liver is less common than the stomach or duodenum, it is a recognized location for ectopic pancreas.

Question 2: Which one of the following statements regarding Cantlie's line is correct?

A. Runs between gall bladder fossa and right hepatic vein
B. Runs between gall bladder fossa and middle hepatic vein (Correct Answer)
C. Runs between gall bladder fossa and right branch of portal vein
D. Runs between gall bladder fossa and left branch of portal vein

Explanation: ***Runs between gall bladder fossa and middle hepatic vein*** - **Cantlie's line** is an imaginary plane that divides the **functional left and right lobes of the liver** [1]. - This line extends from the **gallbladder fossa anteriorly** to the groove for the **inferior vena cava posteriorly**, functionally aligned with the **middle hepatic vein** [1], [3]. *Runs between gall bladder fossa and right hepatic vein* - The **right hepatic vein** typically lies further to the right, dividing the **right anterior and right posterior segments** of the liver [3]. - Cantlie's line is specifically defined by the **major fissure** where the **middle hepatic vein** resides [1]. *Runs between gall bladder fossa and right branch of portal vein* - The **portal vein branches** are located deeper within the liver parenchyma and indicate segmental anatomy rather than the primary functional division [1], [2]. - Cantlie's line is defined by the **major fissure (middle hepatic vein)**, not a portal vein branch [1]. *Runs between gall bladder fossa and left branch of portal vein* - The **left portal vein branch** supplies the functional left lobe and is not involved in defining the primary plane between the functional right and left lobes [1]. - This anatomical landmark relates to the **middle hepatic vein** and the **gallbladder fossa** [1].