A case of mandibular ameloblastic odontosarcoma in the rat is reported. This tumor was radio-induced by the local injection of radioactive cerium chloride and had a double ameloblastic and fibrosarcomatous tumour component associated with varying degrees of mineralisation of the dental tissues, enamel, dentine and osteocement. This case is compared with the several human and animal cases reported in the literature. However, the problem of the development of a fibrosarcoma within a pre-existent odontoma remains, even though in the case reported here the ameloblastic epithelial structures appeared to be highly abnormal and neoplastic.
Case report of a woman of 66 with a more than 8 years duration pineal tumor. Post mortem examination of the anatomical specimen reveals 3 cellular types : pinealocytic, astrocytic and neuronal as components of a pineal ganglioglioma. Less than 10 cases of this tumor whose histogenesis is uncertain have been published.
