Angioma cavernosum is a vascular defect usually found on the face or scalp, and less frequently on other parts of the body surface.
Less often congenital than the simple angiomas, it usually appears during the first year of life. It is a soft, lobulated, solitary or diffuse tumor situated in most cases in the subcutaneous tissue and elevated above the skin surface. It is not uncommon to find the overlying skin the seat of a superficial nevus vasculosus. Occasionally the tumor may undergo spontaneous necrosis resulting in partial or complete involution of the nevus.
Histologically the tumor is diffuse or encapsulated, and composed of dilated vascular channels which in the early formative period manifest rapid growth.
From a surgical standpoint, it is difficult, if at all possible, to remove such angiomas safely and successfully on account of their location and extreme vascularity.
Wickham and Degrais,1 MacKee2 and others