Post traumatic medial instability of the MTP1 joint and ensuing surgical reconstruction: A case report.

Sport injuries of the first metatarsophalangeal joint are well described, especially with traumatic hallux valgus and turf toe reports. However, there is no description of infraclinical medial laxity and following articular disorders. We report the case of a thirty-year-old runner who suffered a sprain initially treated with retentive dressing and local injection. He developed microinstability of the first ray and quickly a bone cyst, pushing us to suggest surgical treatment. After one year of follow up after surgery, he returned to previous high-performance sport. This case highlights the probable undervaluation of post traumatic stability of the first metatarsophalangeal joint, and its potential consequences for the return to sport. Level of Clinical Evidence Level 4.