The Spontaneous Expulsion of a Gallstone From a Cholecystocutaneous Fistula Following Percutaneous Cholecystostomy.

We report an interesting case of a 102-year-old female who presented with a purulent abdominal discharge on the site of a previous percutaneous cholecystostomy in the setting of emphysematous cholecystitis 12 months prior. Imaging demonstrated a cholecystocutaneous fistula (CCF) and a retained calculus along the fistulous tract. On removing the drainage bag, a 2cm calculus was found at the skin level, which was also removed. The patient was discharged with oral antibiotics and found to be symptom-free at the clinical follow-up.