Story of a superfluous muscle accessory soleus muscle sprain: Imaging and diagnostic approach!

Accessory soleus muscle is a rare supererogatory variant, which presents as a mass in posterior compartment of ankle. It can present through a myriad of clinical features ranging from asymptomatic to sprain to complete tear. The pain with accessory soleus can be attributed to either compression of tibial nerve, exertional compartment syndrome and very rarely can be secondary to sprain or tears of the accessory soleus muscle. Very few cases have been documented with soleus muscle injuries. We would like to highlight the importance of imaging in diagnosis and management.