Most sensitive and specific for acute pancreatitis amongst the following is: September 2008
**Core Concept**
The diagnosis of acute pancreatitis involves a combination of clinical assessment, laboratory tests, and imaging studies. Serum lipase and amylase levels are commonly used markers, but their sensitivity and specificity can vary depending on the context.
**Why the Correct Answer is Right**
Amylase is produced by both the pancreas and salivary glands, which can lead to elevated levels in conditions unrelated to pancreatitis. Lipase, on the other hand, is primarily produced by the pancreas, making it a more specific marker for pancreatitis. The serum lipase level is particularly useful in the early diagnosis of acute pancreatitis, as it tends to rise within 4-8 hours of symptom onset and remains elevated for up to 14 days.
**Why Each Wrong Option is Incorrect**
* **Option A:** Amylase is less specific than lipase for pancreatitis due to its production in salivary glands.
* **Option B:** While serum amylase and lipase levels are both elevated in acute pancreatitis, lipase is more specific and sensitive.
* **Option D:** Serum calcium levels can be affected in acute pancreatitis, but they are not a reliable marker for diagnosing the condition.
**Clinical Pearl / High-Yield Fact**
Remember that lipase is the preferred enzyme for diagnosing acute pancreatitis due to its higher specificity and sensitivity.
**Correct Answer:** B. Lipase