Leptomeningeal glioneuronal tumor

Sagittal T2 (image 1), sagittal T1 post contrast (image 2), axial FLAIR (image 3), and axial T1 post contrast (image 4) MRI images and child with diffuse leptomeningeal glialneuronal tumor shows lobular abnormal signal (arrows) extending from the ependymal surface of the ventricular system into the surrounding parenchyma. There is only minimal enhancement of the tumor. Diffuse leptomeningeal glial neuronal tumor is a rare neoplasm that most commonly occurs in boys. Characteristically, the tumor appears with diffuse leptomeningeal thickening. Multifocal cystic lesions may appear in both the brain and spinal cord.

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