Intramuscular Ganglion Cyst: A Common Lesion in an Unusual Location

Ganglion cysts represent the most common benign soft tissue lesion of the hands and wrists. When arising in their characteristic locations, their diagnosis and treatment is easy; however, when arising in atypical locations they pose a diagnostic dilemma. We present a case of intramuscular ganglion cyst arising in the extensor digitorum muscle of the left arm. Due to its unusual location and radiological characteristics it was suspected as being an intramuscular myxoma, and was treated with wide excision. We believe that recognizing this entity in the differential diagnosis of intramuscular cystic lesions is important for proper management.