J Korean Fract Soc.  2008 Oct;21(4):312-315. 10.12671/jkfs.2008.21.4.312.

Lateral Dislocation of the First Metatarsophalangeal Joint: A Case Report

  • 1Department of Orthopedic Surgery, School of Medicine, Chungnam National University, Daejeon, Korea. osdr69@cnu.ac.kr
  • 2Department of Orthopedic Surgery, Saeson Clinic, Daejeon, Korea.


Dislocation of the metatarsophalangeal joint is rare due to the stability of the ligaments and soft tissue surrounding the joint. The authors have experienced lateral dislocation of the first metatarsophalangeal joint, which required surgery, accompanied by complete injuries of medial collateral ligament and capsule, contributing to medial stability, differing from posterior dislocation with intersesamoid complex rupture, with a review of the relevant literature and previous reported cases.


First metatarsophalangeal joint; Lateral dislocation

MeSH Terms

Collateral Ligaments
Metatarsophalangeal Joint


  • Fig. 1 (A) The plain AP radiography showed that the first metatarsophalangeal joint was dislocated and the proximal phalanx was displaced laterally. Also, the space between the first and second metatarsal bone was widened and there was a small avulsive fragment on the medial collateral ligament. (B) In lateral view, the base of proximal phalanx of the greater toe was overlapped with the head of the first metatarsal bone without dorsal or plantar displacement.

  • Fig. 2 (A) After closed reduction, valgus stress radiography showed avulsive bone fragment of the proximal phalanx and medial instability of metatarsophalangeal joint. (B) MRI showed that the intersesamoidal ligment (space between arrows) were intact.

  • Fig. 3 (A) An operative finding. The medial collateral ligament (white arrow) was avulsive from the base of the proximal phalanx and the tendon of abductor hallucis (black arrow) was ruptured. (B) The temporary internal fixation of the first metatarsophalangeal joint was done using K-wire.


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