Final answer:
The most common solid benign liver lesion is a hepatic hemangioma, typically found incidentally during imaging studies and asymptomatic. Diagnosis is confirmed via imaging such as ultrasound or MRI.
Step-by-step explanation:
The most common solid benign liver lesion is a hepatic hemangioma. Hepatic hemangiomas are typically discovered incidentally during imaging studies like an abdominal ultrasound and usually do not cause symptoms. Histologically, the liver is composed of hepatocytes, bile canaliculi, and hepatic sinusoids, and the hepatic hemangioma is a benign vascular tumor that arises from the endothelial cells lining the blood vessels in the liver. Although generally asymptomatic, when they are symptomatic, they may cause discomfort or pain due to their size or location. Diagnosis is most often confirmed through imaging modalities such as ultrasound, computed tomography (CT), or magnetic resonance imaging (MRI), where the lesion typically appears as a well-circumscribed, hyperechoic (in ultrasound), or hyperintense (in MRI) area.