Abstract

We report the clinical course and autopsy findings of a 19-year-old girl with endodermal sinus tumor involving the thalamus, hypothalamus, and basal ganglia. The patient initially had tonic-clonic seizures with abnormal signal involving the right hippocampus, amygdala, basal ganglia, putamen, and dentate gyrus. The signal intensity of the posterior pituitary on T1-weighted images was decreased at the time of admission, which was not associated with clinical symptoms of diabetes insipidus (DI). A huge tumor mass as well as central DI developed within 10 months. The postmortem examination showed gliosis with calcification involving the right basal ganglia, internal capsule, and white matter, in addition to a tumor mass involving the thalamus, hypothalamus, and basal ganglia. Dissemination of tumor cells in the leptomeninges and the gliotic area and hydrocephalus were also noted.

• Keywords: Brain Neoplasms;Endodermal Sinus Tumor;Epilepsy;Tonic;Clonic