**Question:** "Row of tomb stones" appearance is a feature of -

A. Acute Pancreatitis
B. Acute Myocardial Infarction
C. Acute Pneumonia
D. Acute Pancreatitis

**Core Concept:** The "row of tombstones" appearance refers to a characteristic radiological finding in medical imaging, particularly in chest X-rays and computed tomography (CT) scans. It is an indicator of the presence of multiple, closely packed, and rounded opacities. This term is commonly used to describe the radiological presentation of certain medical conditions.

**Why the Correct Answer is Right:** The correct answer is D) Acute Pancreatitis, as the "row of tombstones" appearance is a characteristic feature of acute pancreatitis on imaging studies. In this condition, the pancreas becomes inflamed, leading to the formation of multiple, closely packed, rounded opacities, resembling a row of tombstones. These opacities are caused by the accumulation of pancreatic enzymes and fluid within the pancreas, resulting in tissue swelling and inflammation.

**Why Each Wrong Option is Incorrect:**

A) Acute Pancreatitis: This is incorrect because the "row of tombstones" appearance is specific to acute pancreatitis, not the other options.

B) Acute Myocardial Infarction: Although myocardial infarction can present with opacities on imaging studies, the term "row of tombstones" is not commonly used for this condition. Myocardial infarction typically presents with a different radiological pattern, such as a "Wallenberg sign" or "Wallenberg pattern."

C) Acute Pneumonia: Acute pneumonia can show multiple, rounded opacities on imaging studies, but the term "row of tombstones" is not a standard description for this condition. Pneumonia presents with a different radiological pattern, such as a "ground-glass opacity" or "consolidation."

**Clinical Pearl:**
Understanding the distinctive radiological patterns of various medical conditions is essential for accurate diagnosis and appropriate management. In the case of the "row of tombstones" appearance, it is specific to acute pancreatitis and helps radiologists and physicians differentiate it from other conditions that may cause similar opacities on imaging studies.