What are indirect inguinal hernias?

Pass through deep inguinal ring, inguinal canal, superficial inguinal ring and descends to scrotum. Lie lateral to inferior epigastric vessels, congenital (at birth), derived from persistence of processus vaginalis and covered by peritoneium and the coverings of spermatic cord, neck of hernia must be located lateral to inferior epigastric artery to enter inguinal canal and sac of hernia must lie w/in fibers of cremaster muscle.