Anomalous left coronary artery from the pulmonary artery: case report and review of the literature.

Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is an uncommon occurrence, usually diagnosed at a young age. We report a 71-year-old patient who died suddenly of acute bilateral bronchopneumonia, and was found to have ALCAPA at autopsy. The patient had reported no cardiac symptoms during his lifetime. Autopsy revealed collateral connections between the left coronary artery (LCA) and right coronary artery (RCA), which were diffusely dilated, calcified and atherosclerotic.