Dropped gallstones causing abdominal wall abscess and pleural empyema: a case series

Dropped gallstones are gallstones lost in the abdominal cavity during cholecystectomy. They are a rare occurrence and often cause minimal long-term issues. However, it is recognised that dropped stones can cause intra- or extra-abdominal sepsis. We present three cases below which highlight this. All three cases describe patients presenting for laparoscopic cholecystectomy, Cases 1 and 2 post-gallstone pancreatitis and Case 3 for gallbladder stones. Cases 1 and 3 presented nine months and five years post-operatively, respectively, with flank abscess. Both received CT scans, with incision and drainage performed to remove gallstone. Case 2 presented six weeks post-operatively with cough and breathlessness. CT scan showed pleural effusion with communication to subphrenic collection. Pus and gallstone fragments were drained. The above cases highlight that despite the majority of patients remaining asymptomatic, dropped gallstones should be considered amongst the differential in patients presenting with intra- or extra-abdominal abscess post-cholecystectomy, with timely intervention key to management