Lateral ankle anatomical variants predisposing to peroneal tendon impingement

Abstract

PurposeTo delineate the significant association between the peroneal tendons injury and the lateral ankle joint anatomical variants. SubjectsRetrospective revision of the last 600 ankle MRI examinations, with dividing such candidates into: Group A: Inclusion group including patients with pure Peroneal tendon injury & lateral ankle anatomical variants. Group B: Control group including patients with Peroneal Tendonsinjury & no anatomical variants. Group C: Exclusion group including patients with other different types of ankle injuries. TechniqueStandard MRI ankle joint protocols. ResultsGroup A: 73 patients (40.3%) had PTT including: straight/convex RMG in 48 (26.5%) patients; 19 of them (39.6%) had PTT, PT hypertrophy in 39 (21.6%) patients; 14 (35.9%) of them had PTT. RCE hypertrophy in 33 (18.3%) patients; 12 of them (36.4%) had PTT. PQ muscle was seen in 15 (8.3%) patients; 7 (46.7%) of them had PTT. Low PB muscle belly was found in 29 (16%) patients; 13 (44.9%) of them had PTT. OP was found in 17 (9.3%) patients; 8 (47%) of them had PTT. Group B: 26 of them (18%) had PTT. Fisher exact test 0 P value. ConclusionThe lateral ankle joint anatomical variants facilitate peroneal tendons injury, ending in chronic lateral joint instability.