Direct Observation of a Single Peroneal Myotendinous Unit Anatomic Variant: A Case Report and Systematic Review

JBJS Case Connect. 2023 Aug 9;13(3). doi: 10.2106/JBJS.CC.23.00171. eCollection 2023 Jul 1.


Case: A 29-year-old woman with acute peroneal tendon subluxation underwent superior retinacular repair. On exposure, a single peroneal myotendinous unit was encountered, as opposed to the usual presence of independent peroneal tendons arising from separate muscle bellies. At 3-year follow-up, she has had no recurrence with full return to activity and no limitations.

Conclusion: Multiple peroneal myotendinous variants have been described; however, this report is the first to describe direct intraoperative observation of a single peroneal myotendinous unit. Whether this anatomic variant contributed to the patient's problem or has other potential clinical sequelae remains to be elucidated.

Publication types

  • Systematic Review
  • Case Reports

MeSH terms

  • Adult
  • Ankle Injuries* / surgery
  • Female
  • Humans
  • Leg
  • Muscle, Skeletal
  • Tendon Injuries* / complications
  • Tendon Injuries* / diagnostic imaging
  • Tendon Injuries* / surgery
  • Tendons / surgery