Malignant neuroendocrine tumor with epithelial differentiation

Findings:

Multiple MRI images demonstrate a heterogeneously enhancing mass in the region of the pineal gland. The lesion demonstrates intermediate T2 signal and mild restricted diffusion indicating a cellular lesion. The mass splays the third ventricle posterior aspect and compresses the tectum, causing obstructive hydrocephalus with a small amount of transependymal CSF flow. A small indeterminate FLAIR hyperintense nodule is present within the right temporal horn. The mass has multilobulated margins.

Discussion/Differential Diagnosis:

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