Increased signal and fluid in relation to the medial head of gastrocnemius muscle with fluid deep to muscle belly between gastrocnemius and soleus. There is proximal retraction of muscle belly along with fluid signal in the myotendinous junction suggesting tear of the medial gastrocnemius.
MRI findings of tennis leg include:
1) high T2 signal fluid deep to medial gastrocnemius and superficial to the soleu
2) focal area of disruption of muscle continuity noted along the deep aspect of the medial head of the gastrocnemius, with associated oedema of the muscle