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Accessory soleus muscle

Case contributed by Ahmed Abdrabou
Diagnosis certain

Presentation

Left ankle pain and limitation of movement.

Patient Data

Age: 40 years
Gender: Male
mri

Incidental discovered accessory soleus muscle is noted filling the Kager's fat pad. It inserts into the upper medial aspect of calcaneus through fleshy fibers (No tendon). Fluid signal is seen surrounding the flexor hallucis longus tendon is consistent with tenosynovitits. 

Case Discussion

The origin of the muscle is not evident however its insertion through fibers (non tendinous) into the posterior aspect of upper medial surface of calcaneous adjacent to the origin of quadratus plantae muscle. 

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