All are true about insulinoma except
**Core Concept**
Insulinomas are rare, benign or malignant tumors of the pancreas that autonomously produce insulin, leading to hypoglycemia. This condition results from an excessive production of insulin by the tumor cells, which can cause a range of symptoms including confusion, tremors, and even seizures.
**Why the Correct Answer is Right**
Insulinomas are typically solitary, well-circumscribed lesions that arise from the pancreatic beta cells. They are usually benign but can be malignant in some cases. The symptoms of insulinoma can be attributed to the excess insulin production, which leads to hypoglycemia.
**Why Each Wrong Option is Incorrect**
**Option A:** Insulinomas are typically solitary, well-circumscribed lesions, so option A is incorrect as it might suggest multiple insulinomas.
**Option B:** Insulinomas are usually benign, not malignant, so option B is incorrect as it suggests malignancy.
**Option C:** Insulinomas can cause symptoms such as confusion, tremors, and seizures due to hypoglycemia, so option C is correct and should not be an option.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that insulinomas can be challenging to diagnose, and the diagnosis is often made based on clinical presentation, laboratory findings, and imaging studies. A Whipple's procedure or enucleation of the tumor may be necessary for definitive management.
**Correct Answer: B. Insulinomas are usually benign.**