Migration of a bladder diverticulum stone into the rectum revealing an advanced rectal process.

Rectovesical fistulas are rare and typically result from inflammatory or neoplastic conditions in the small pelvis. They occur within a pelvic region that has been altered by local inflammatory or neoplastic processes. This explains the challenges in detecting these fistulas using conventional imaging techniques, despite the effectiveness of CT and MRI.

Intra-abdominal abscess from dropped gallstone: A case report.

Dropped gallstones are a common complication during a laparoscopic cholecystectomy. The formation of an abdominal abscess related to the dropped gallstones is rare because the majority of these calculi do not cause complications. Ultrasound is a usually used first-line imaging modality to detect gallstones in the abscess.