Rare Case of Giant Asymptomatic Left Coronary Artery Aneurysm of 10 cm Associated with Coronary Cameral Fistula.

A giant coronary artery aneurysm (CAA) associated with a coronary cameral fistula is an extremely rare finding. Most cases of CAAs are asymptomatic. The incidence of CAA varies between 0.3% to 5.3%. Due to advancements in diagnostic technologies, the incidence of CAA is on the rise. Even in the modern days of medical science, the clinical course of CAA is still unpredictable and the suitable timing for the treatment of CAA is still open to debate. We reported a case of a giant coronary artery aneurysm in a 38-year-old female, which was 9.4 x 9.7 x 9.2cm in size, arising from the left coronary artery, extending into the proximal circumflex, and draining into the right atrium, forming a fistula tract. The patient was diagnosed with the help of coronary computed tomography (CT) and cardiac catheterization after which surgery was performed to repair the aneurysm and fistula. Postoperatively, the patient recovered without any complication.