Abstract
BACKGROUND: Post-traumatic calf injuries most commonly involve the medial head of the gastrocnemius muscle. In contrast, injuries to the tibialis posterior muscle, particularly at the myotendinous junction, are rare. CASE REPORT: We present the case of a healthy young male who experienced a fall, followed by pain and swelling in the posterior calf. Radiographs excluded a fracture, and subsequent ultrasound evaluation identified an injury at the myotendinous junction of the tibialis posterior muscle. DISCUSSION: Traumatic injuries to the calf typically affect the medial gastrocnemius and soleus muscles, which form part of the triceps surae complex. Ultrasound imaging proved instrumental in localising the injury and allowed for dynamic assessment. This modality is reproducible and facilitates monitoring the healing process. To our knowledge, similar cases involving the tibialis posterior myotendinous junction have not been documented in the literature. CONCLUSION: Ultrasound evaluation of a post-traumatic calf injury revealed a rare myotendinous lesion of the tibialis posterior, highlighting the importance of comprehensive imaging in atypical presentations.