**Question:** CT findings of acute pancreatitis are – a) Fuzzy outline of pancreas b) Dilatation of pancreatic duct system c) Peripancreatic fluid collection d) All

**Core Concept:** Acute pancreatitis is an inflammatory condition of the pancreas that can be diagnosed using imaging modalities like CT. The main findings include alterations in pancreatic morphology, ductal system, and peripancreatic fluid collections.

**Why the Correct Answer is Right:** In acute pancreatitis, the pancreas becomes inflamed and swollen, which leads to a "fuzzy outline" of the pancreas (option A). Additionally, the pancreatic duct system dilates due to obstruction, inflammation, or spasm (option B). Peripancreatic fluid collections, also known as loculated or free fluid, occur as a result of leakage of pancreatic enzymes and inflammatory exudates into the surrounding tissues (options C and D). These findings help in diagnosing acute pancreatitis on a CT scan.

**Why Each Wrong Option is Incorrect:**

Option A (Fuzzy outline of pancreas) is incorrect because the correct answer already explains the "fuzzy outline" as a result of inflammation.
Option B (Dilatation of pancreatic duct system) is incorrect because it is not mentioned in the correct answer as a separate option. However, the dilatation is included within options A and C.
Option E (Absent ductal morphology) is incorrect because the correct answer highlights the dilatation of the pancreatic duct system.

**Clinical Pearl:** Acute pancreatitis can be a life-threatening condition requiring prompt diagnosis and management. A comprehensive evaluation of the pancreas, ducts, and fluid collections on a CT scan aids in making the correct diagnosis and initiating appropriate treatment.

**Correct Answer:** D) Peripancreatic fluid collection

**Explanation:** Acute pancreatitis is characterized by inflammation and swelling of the pancreas, which can lead to various imaging findings on a CT scan. Options A, B, C, and E are all part of the correct answer, but the main focus here is peripancreatic fluid collection (option D). This finding represents leakage of pancreatic enzymes and inflammatory exudates into the surrounding tissues, commonly seen in acute pancreatitis cases. This clinical pearl helps in establishing the diagnosis and initiating appropriate treatment.