What is cavernous hemagioma?

DEFINITION A benign vascular tumor resulting from abnormal differentiation of angioblastic tissue during fetal life; usually located in the right posterior segment of the liver. INCIDENCE Most common benign tumor of the liver; occurs at all ages. SIGNS AND SYMPTOMS Usually asymptomatic; rarely presents with pain, a mass, or hepatomegaly. DIAGNOSIS Usually discovered incidentally. Early peripheral enhancement with intravenous (IV) contrast on CT, MRI, or tagged red cell scan Do not biopsy, as hemorrhage can occur. TREATMENT Surgical resection if symptomatic or in danger of rupture; otherwise, observe.