Non-communicating intramuscular ganglia

Intramuscular ganglia are rare. Most of the previously reported cases were connected with an adjacent joint. We present the imaging findings in three patients who had intramuscular ganglia that were not connected with a joint . Magnetic resonance showed a septated, encapsulated mass that was iso- of hypointense to muscle on T1-weighted and hyper-intense on T2-weighted image s. A post-contrast T1-weighted scan in one patient showed minimal capsular enhancement. Ultrasound performed in one case an encapsulated, anechoic mas s.