A Case of Intractable Lung Abscess Following Dropped Gallstone-Induced Subphrenic Abscess: A Rare Postoperative Complication Caused by Dropped Gallstone During Laparoscopic Cholecystectomy.

Dropped gallstones into the abdominal cavity due to perforation of the gallbladder occasionally occur during laparoscopic cholecystectomy. Abscess formation caused by residual gallstones is one of the late postoperative complications after laparoscopic cholecystectomy. Most of them are intra-abdominal abscesses; however formation of intra-thoracic abscesses, in particular, lung abscess, is less described, and surgery for an intra-thoracic abscess is rarely performed. We describe a case of intractable lung abscess following dropped gallstone-induced subphrenic abscess caused by a residual gallstone after laparoscopic cholecystectomy.