Abstract:
OBJECTIVE:To evaluate anatomical variations in the lateral ankle and their relationships with pathological conditions of the peroneal tendon on magnetic resonance imaging (MRI) in symptomatic patients. MATERIALS AND METHODS:Sixty-nine ankles MRIs of 60 adult patients with symptomatic ankles were included. The presence and sizes of peroneal tubercle and retrotrochlear eminence (RTE), the prevalence of peroneus quartus (PQ), os peroneum, and boomerang-shaped peroneus brevis (PB) tendon, the shape of the retromalleolar fibular groove (RMFG), and the location of the PB muscle-tendon junction were evaluated. The relationships of these variations with peroneal tendinopathies were assessed. The correlations between pathological peroneal conditions on MRI and clinical findings were evaluated. RESULTS:Peroneal tubercle (mean size, 3.2 mm) and RTE (mean size, 4.5 mm) were identified in 58 (84%) and 69 (100%) ankles respectively. PQ muscle, os peroneum, and boomerang-shaped PB tendon were found in 9 (13%), 7 (10%), and 24 (34.8%) ankles respectively. The RMFG was concave, flat, convex, and irregular in 14 (20.3%), 40 (58%), 13 (18.8%), and 2 (2.9%) ankles respectively. Sixteen (23.2%) patients had low-lying PB muscle belly. Only boomerang-shaped PB tendons showed a significant relationship with peroneal tendinopathies. MRI and clinical findings had a poor correlation in pathological peroneal conditions and both had low sensitivity in diagnosis. CONCLUSION:Lateral ankle anatomical variations are common and cannot be attributed to pathological conditions of the peroneal tendon, except for boomerang-shaped PB tendons. Both clinical and MRI findings have low sensitivity in the diagnosis of peroneal tendinopathies, which are often incidental findings on MRI.
journal_name
Skeletal Radioljournal_title
Skeletal radiologyauthors
Ersoz E,Tokgoz N,Kaptan AY,Ozturk AM,Ucar Mdoi
10.1007/s00256-019-3151-5subject
Has Abstractpub_date
2019-08-01 00:00:00pages
1221-1231issue
8eissn
0364-2348issn
1432-2161pii
10.1007/s00256-019-3151-5journal_volume
48pub_type
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