MRI Diagnosis of a Ganglion Cyst of the Peroneal Nerve

ABSTRACT

A nerve ganglion cyst is characterized by the accumulation of a mucoid substance in or around the nerve, which leads to the formation of a pseudocyst. This 53-year-old man presented with left foot drop of three-year duration, using magnetic resonance imaging, 3-cm ganglion cyst of the peroneal nerve was preoperatively diagnosized. Surgical exploration disclosed a lobulated cystic mass filled with gelatinous material, and the lesion was completely resected. No connection with the knee joint was found, and postoperative recovery of motor function was good. The authors describe a case of intraneural ganglion cyst of the peroneal nerve which illustrates the value of MR in diagnostic imaging.