Abstract Background An Amyand hernia is a rare condition in which the vermiform appendix follows the bowel as it bulges through the inguinal canal. Originally described by Claudius Amyand in 1735 in an 11-year-old boy who had a pin in the appendix (Philos Trans R Soc Lond. 1735;39:329–36), we describe here the first case with CT depicting all components of Dr. Amyand’s original case. Case presentation A 10-year-old boy presented with right lower quadrant and groin pain. CT imaging revealed a retained metallic foreign body perforating the appendix, acute appendicitis, and an Amyand hernia. A laparoscopic attempt at reduction failed due to tethering by the needle and inflammation of the hernia sac, requiring an open inguinal exploration and excision of the hernia sac. The patient was discharged on postoperative day 2 with plans for delayed hernia repair. Conclusions CT is a crucial diagnostic test for surgical decision-making in Amyand hernias. In this case, it accurately classified the hernia and led to anticipation of unsuccessful laparoscopic hernia reduction. Management in the setting of foreign body and perforation includes appendectomy and tissue herniorrhaphy with delayed formal inguinal hernia repair after inflammation has subsided.