Intracranial Dysgerminoma

Abstract

Intracranial Dysgerminoma is a rare extragonadal germ cell tumor which originates itself at a extragonadal site.  It represents approximately 3 percent of intracranial tumors in children under the age of 15. For unknown reasons, these tumors are more frequent in Asian countries, where they account for 12 percent of  intracranial neoplasms. They show a peak in incidence between 10 and 14 years of age with a male predominance. We have reported a case of a 19 year-old patient who had been showing signs of diplopia and transitory parestesia of the left hand. He took brain magnetic resonance which identified nodule injuries in the right mesencephalus  and in the bilateral thalamic region as well. The histologic diagnosis was delayed due to the use of corticoid which contributed to the injury reduction preventing  access to the biopsy. After the interruption of the corticotherapy and injury regrowth, a biopsy was performed with the confirmation, by means of immunohistochemistry, of a brain  disgerminoma. The patient was submitted to a craniospinal radiotherapy, and a new magnetic resonance indicated a complete answer to the treatment done. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />