Abstract
A 50-year-old male presented with a rare intraparenchymal metastatic tumor spreading through the periventricular tissue. Magnetic resonance (MR) imaging demonstrated the tumor as a heterogeneous low-intensity area on T1-weighted images with enhancement by gadolinium-diethylenetriaminepenta-acetic acid, and as a heterogeneous high- or isointensity area on T2-weighted images. Histological examination of a biopsy sample showed adenocarcinoma. This MR imaging appearance is typical of malignant glioma. The differential diagnosis of tumor in the cerebral parenchyma with ventricular dissemination should include both primary and secondary intracranial malignant tumors. MR imaging is useful in the diagnosis of such tumors, but the final diagnosis should be based on either tissue biopsy or cytological examination of the cerebrospinal fluid.
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