Dissecting aneurysm of coronary artery associated with drug abuse and pulmonary lesions.

A dissecting aneurysm of the coronary artery (DACA) associated with cystic medial necrosis was discovered during the necropsy of a 32-year-0ld black man with evidence of intravenous drug abuse. Microscopic examination of the lungs revealed striking angiomatoid conversion of pulmonary arterioles. The cause of death and the possible relationship between the pulmonary vascular lesions and the DACA are discussed.