Primitive neuroectodermal tumour of the mandible.

Primitive neuroectodermal tumors (PNETs) are relatively rare tumors. Tumors that once would have been diagnosed as Ewing's sarcoma are now often designated as peripheral neuroepithelioma or synonymously PNET. Herein we report the first case of PNET of the mandible in a 6-year-old female who was admitted to the hospital with a two-months history of painless, progressively enlarging lower jaw mass.