Dislocation of first metatarsophalangeal joint is a rare condition. Anatomically, the head of first metatarsal is stabilized by various soft tissue structures associated with the sesamoid bones. When the metatarsal head was entrapped underneath the sesamoid complex, it might be impossible to gain reduction via closed method.

We experienced a case of dorsal dislocation of first metatarsophalangeal joint and associated dislocation of larsornetatarsal joint in a 32 year old man who was injured by ftll from height. Closed reduction fEiled even under spinal anesthesia. Open reduction via medial approach revealedbuttonholingof the metatarsal head under the sesamoid complex, which had made colsed reduction impossible. Concerning about the rarity and anatomical characteristic of these injuries, we report this case with reviewing of the literatures.