Abstract
A 93-year-old man was admitted with right hypochondralgia. The blood chemistry test and a CT scan indicated acute cholecystitis. On the 7th hospital day, a CT scan revealed a large subcapsular cystic mass in right lobe. A thoracentesis under ultrasound guidance obtained bile-stained fluid. Contrast radiography revealed a fistula between the biloma and gallbladder. After conservative treatment, cholecystectomy was performed. This case demonstrated spontaneous biloma followed by acute cholecystitis. This disease is very rare, we report it with a review of the literature.