Juvenile xanthogranuloma occurring in the floor of mouth: report of a case.

Abstract

A case of solitary juvenile xanthogranuloma occurring in the floor of the mouth is presented. The patient was a 7-year-old girl who had been suffering from Ewing’s sarcoma of the mandible. In the surgical operation material consisting of the mandibular bone and its surrounding soft tissues, a thumb’s tip-sized and well-circumscribed tumor with yellowish brown in colour and elastic soft in consistency was found in the region of the floor of the mouth. Histological examination revealed that this tumor was composed of densely-packed foamy histiocytes and Touton giant cells. Small mononuclear cells, loose fibrous connective tissues, and small vessels were scatterd throughout the lesion. A review of the literature has revealed only two previously documented cases of juvenile xanthogranuloma occurring solitarily in the oral cavity.