An unusual foreign body in an inguinal hernia sac: case report and literature review.

A 13-month-old boy accidentally ingested a 5 cm dressmaker's pin. On presentation, the pin was in the duodenum and there was a right inguinal hernia. After 17 days, the pin failed to progress. At surgery, the sac contained appendix perforated by the pin. This is the first case in the literature.