COMPOSITE CEREBRAL METASTASIS AND OLIGODENDROGLIOMA - AN EXCEPTIONAL FORM OF MIXED NEOPLASIA

Our report describes the uncommon case of a 61 year old female patient who underwent a left parietooccipital craniotomy and extirpation of a malignant tumor. Histological examination revealed a metastatic carci noma of mammary origin intimately intermingled with a calcified oligod endroglioma WHO II. The preexisting oligodendroglial part had been det ected four years before, but since then had been misinterpreted as a g lious scar resulting from a previous brain trauma. Three years before neurosurgical intervention, the patient had undergone a left side mast ectomy. The histological finding at that time was a solid breast tumou r WHO T1N0. The occurence of cerebral mixed neoplasias and possible ca usal factors are discussed.