Talocalcaneal coalition: fibrous

Case contributed by Dr Amro Omar


Lateral leg pain

Patient Data

Age: 11
Gender: Male

MR shows fibrous coalition between the calcaneal sustentaculum tali and the adjacent talus

This case shows also os trigonum, peroneal and flexor muscles tenosynovitis, thickening of the superior and inferior peroneal retinacula, torn calcaneofibular ligament with attenuated anterior talofibular ligament

Annotated image

Coronal and sagittal T2WI FS fully demonstrate the TC coalition (red arrows). However, there is a talar beak, along with osseous edema in the talus and navicular, resulting from abnormal motion at the talonavicular joint (yellow arrow), related to restricted motion at the site of talocalcaneal coalition.

Case Discussion

  • tarsal coalition is 25% bilateral, even if clinical suspicion is unilateral
  • calcaneonavicular (CN) ≈ 45%
  • talocalcaneal (TC) ≈ 45%
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Case information

rID: 36946
Published: 19th May 2015
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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