Avulsion fracture at the plantar lateral base of the first metatarsal. Two case reports.

The anatomy, mechanism, and two treatment approaches of an avulsion fracture at the plantar lateral base of the first metatarsal without any joint dislocation were discussed. The authors presented an injury that has not been reported in the literature but has only been seen as a part of Lisfranc's fracture dislocation types B and C.