Injury to the soleus is considered uncommon and is only rarely reported. It has been postulated, however, that injury to this muscle may occur more frequently than reported as soleus tears may be erroneously diagnosed as tears of the gastrocnemius . The soleus muscle originates at the posterior aspect of the proximal tibia and fibula and runs deep to the gastrocnemius muscle. The soleus and gastrocnemius muscles gradually conjoin to form the Achilles tendon 8 to 10 cm above its insertion onto the calcaneus .
With only a few case reports of soleus muscle injury, mechanism and description of the injury is limited. One case report describes a hematoma with surrounding edema within the muscle belly of the soleus in a young girl with calf pain after a volleyball match . Soleus muscle strain was found to be an associated injury in 17% (4/23) of distal myotendinous injuries to the gastrocnemius .
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