An unusual presentation of intoeing in a child.

Ganglion cysts are commonly seen in orthopedic and general practice. Compression of the common peroneal nerve by a ganglion cyst is rare in children; to the authors' knowledge, only five cases in patients younger than 18 years have been reported. A ganglion cyst was found in a 3-year-old child who was brought in for an evaluation of intoeing and was found subsequently to have a mass in the proximal aspect of the right leg. The literature is reviewed with attention to specific recommendations for the evaluation of soft tissue masses and the utility of imaging modalities.