A variant neglected Type IIIA dorsal dislocation of first metatarsophalangeal joint. A case report

•We described a new variant of dorsal dislocation of the first metatarsophalangeal joint.•We classified it as a Jahss Type IIIA, a variant.•We performed an open reduction with a conservative surgery.•We obtain good outcomes with total satisfaction of the patient.

We present a rare injury consisting of a neglected, irreducible, dislocation of the first metatarsophalangeal joint that was diagnosed 4 months after the injury. An open reduction was necessary from the beginning. Patient returned to full activity without pain or disability, so a good prognosis despite the delayed diagnosis was achieved. We are unaware of previous reports in the literature describing this unusual variant.