Internal inguinal hernia in a 20-month-old boy.

The authors report on a 20-month-old boy with internal inguinal hernia. The patient was reoperated for clinical signs of intestinal obstruction after an incarcerated inguinal hernia repair. The diagnosis of internal inguinal hernia was proven by surgical exploration. This is the first internal inguinal hernia case reported in the literature and completely different from the atypical parainguinal hernias reported before.