A RARE DIAPHYSEAL BONY TUMOR - THE PERIOS TEAL GANGLION

The purpose of the study was to clarify the clinico pathological featu res of periosteal ganglion. The authors present a case of an unusual d iaphyseal bony tumor in a 27 years old man. The diagnosis of diaphysea l periosteal ganglion cyst was made on roentgenographic appearance, pr esence of mucoid material and histologic evidence of a synovial type c ellular lining. The patient was successfully treated with excision. Th e follow-up examination showed no recurrence one year after surgery. T he radiological differential diagnosis were considered and possible pa thogenis for a periosteal ganglion was discussed. Periosteal ganglia m ust be considered as a cause of cortical erosions. This lesion may rad iologically mimic other periosteal lesions. Treatment with excision is successful in most cases.