**Question:** Most common benign tumour of liver is-

A. Hemangioma
B. Hepatocellular adenoma
C. Angiomyolipoma
D. Lipoma

**Core Concept:** Benign liver tumors are neoplasms that do not invade surrounding tissues or spread to distant organs. They can be classified into two main types: vascular tumors (hemangioma) and non-vascular tumors (adenoma, lipoma). Hemangioma is the most common benign liver tumor, while other options are rarer.

**Why the Correct Answer is Right:**

A. Hemangioma: This is a group of dilated blood vessels forming a mass. It is a benign vascular tumor, originating from endothelial cells lining blood vessels. Due to its vascular nature, hemangioma shows a predilection for the liver, accounting for the correct answer.

**Why Each Wrong Option is Incorrect:**

B. Hepatocellular adenoma: This is a non-vascular tumor originating from liver cells (hepatocytes). Although benign, adenomas can be potentially life-threatening due to the risk of spontaneous hemorrhage or rupture.

C. Angiomyolipoma: This is a rare benign tumor comprised of fat, smooth muscle, and blood vessels. It primarily affects the kidneys, making it less likely to be the correct answer for a liver tumor.

D. Lipoma: A benign fatty tumor originating from adipocytes, lipomas are associated with the skin and subcutaneous tissues, making them extremely rare in liver.

**Clinical Pearl:**

Understanding the distinction between vascular and non-vascular liver tumors is crucial for appropriate diagnosis and management. While benign liver tumors can be challenging to differentiate from malignant ones, knowledge of their clinical presentation, imaging findings, and risk factors can aid in making an accurate diagnosis.