A 17-year-old presents with recurrent abdominal pain for 3 months. Amylase and lipase are raised. What is the likely diagnosis based on USG and MRCP findings?

1. A

   Choledochal Cyst

2. B

   Annular Pancreas

3. C

   Pancreas Divisum

4. D

   CBD stone

Appeared in: INI-CET EXAM -2025

Explanation

• Pancreas divisum is a congenital anomaly where the ventral and dorsal pancreatic ducts fail to fuse during embryological development.
• The MRCP image clearly shows the characteristic finding of pancreas divisum: the larger dorsal duct draining the pancreatic body and tail separately from the smaller ventral duct.
• This anatomical variation can lead to a relative obstruction of pancreatic outflow at the minor papilla, causing recurrent episodes of acute pancreatitis, which explains the patient's symptoms and elevated enzyme levels.

Why Other Options Were Wrong

• Option A: A choledochal cyst is a cystic dilatation of the biliary tree. The provided MRCP image shows an anomaly of the pancreatic ductal system, not a cystic dilatation of the bile duct.
• Option B: Annular pancreas is a condition where a ring of pancreatic tissue surrounds the duodenum. The MRCP shows a division of the pancreatic duct, not pancreatic tissue encircling the duodenum.
• Option D: While a common bile duct (CBD) stone can cause pancreatitis, the primary finding on the MRCP is the congenital ductal anatomy of pancreas divisum, not a stone.

Related Visual

• Visual 1: Diagram: Illustration comparing a normal pancreatic duct system with the anatomy of Pancreas Divisum, highlighting the separate drainage through the major and minor papillae.
• Visual 2: Flowchart: Depicting the pathophysiology from Pancreas Divisum -> Relative outflow obstruction at minor papilla -> Increased dorsal duct pressure -> Recurrent acute pancreatitis.
• Visual 3: MRCP Image: A labeled version of the provided MRCP, pointing out the dorsal duct (of Santorini), ventral duct (of Wirsung), gallbladder, and common bile duct to help learners identify the key structures.

Clinical Relevance

• Nursing practice connection: Use the key finding related to Interpretation of MRCP findings in the context of recurrent pancreatitis to guide bedside assessment, documentation, and the next nursing action.
• Pancreas divisum is the most common congenital pancreatic anomaly and should be considered in the differential diagnosis of unexplained recurrent acute or chronic pancreatitis, especially in younger patients.
• While most individuals with pancreas divisum are asymptomatic, a small subset develops symptoms due to relative stenosis of the minor papilla.
• Nursing care for a patient with pancreatitis due to pancreas divisum involves managing acute episodes with pain control, IV fluids, and nutritional support. Patient education focuses on recognizing symptoms of pancreatitis and understanding the potential need for endoscopic or surgical intervention (e.g., sphincterotomy of the minor papilla) if episodes are frequent or severe.

How to Approach the Question

• First, analyze the patient's clinical presentation: a young patient with recurrent abdominal pain and elevated pancreatic enzymes strongly indicates recurrent pancreatitis.
• Next, recognize that recurrent pancreatitis in a young person without other risk factors (like alcohol abuse or gallstones) suggests an underlying anatomical or genetic cause.
• Carefully examine the provided image. Identify it as an MRCP, a specialized MRI for the biliary and pancreatic ducts.
• Systematically trace the ducts in the image. Observe that the main duct draining the body and tail is separate from the duct in the head, a classic sign of non-fusion.
• Correlate this specific imaging finding with the given options. The non-fusion of ducts is the definition of Pancreas Divisum.
• Eliminate other options based on their distinct imaging characteristics which are absent in the provided image (e.g., no cystic bile duct dilatation for choledochal cyst, no tissue ringing the duodenum for annular pancreas).

Concept Tested & Keywords

• Concept Tested: Interpretation of MRCP findings in the context of recurrent pancreatitis.
• Stem keywords: recurrent abdominal pain, amylase, lipase, USG, MRCP
• Lead-in keywords: likely diagnosis
• Clinical cues: 17-year-old with recurrent symptoms suggests a possible congenital or chronic underlying cause.
• Clinical cues: Raised amylase and lipase confirm pancreatic inflammation (pancreatitis).

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