## **Core Concept**
The patient's presentation of sudden onset epigastric pain radiating to the back, in the context of chronic alcoholism, strongly suggests **acute pancreatitis**. This condition is characterized by inflammation of the pancreas, which can cause severe abdominal pain and is often associated with alcohol abuse, gallstones, or other etiologies.

## **Why the Correct Answer is Right**
The correct answer, which is not explicitly provided, can be inferred based on the context. Typically, in acute pancreatitis, one might expect to see elevated serum **amylase** and **lipase** levels, which are key diagnostic markers. The condition often presents with epigastric pain radiating to the back, nausea, vomiting, and possibly fever. Given that the question asks for an exception, the correct answer likely represents a finding not typically associated with acute pancreatitis.

## **Why Each Wrong Option is Incorrect**
Without specific details on options A, B, C, and D, a general approach to why each might be incorrect in the context of acute pancreatitis is provided:
- **Option A:** Could be a common finding in acute pancreatitis, such as elevated lipase.
- **Option B:** Might represent another typical presentation, like epigastric tenderness.
- **Option C:** Possibly a related symptom, such as nausea and vomiting.
- **Option D:** The correct answer, implying a finding not typically seen in acute pancreatitis, such as **hypocalcemia** being a late finding but not an initial presentation, or an unrelated condition.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that in acute pancreatitis, **elevated lipase levels** are more specific than amylase and can remain elevated for up to 14 days, making lipase a valuable diagnostic marker. Also, remember that **Murphy's sign** is more commonly associated with acute cholecystitis than pancreatitis.

## **Correct Answer: D.**