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Click 68 year old man with primary CNS lymphoma. CT head without contrast with scout image.
Axial images through the brain without contrast demonstrating multiple hyperdense intraventricular masses with dilation of the right temporal horn.


Click 68 year old man with primary CNS lymphoma. MRI sagittal T1 postcontrast
Sagittal images demonstrate multiple enhancing lesions throughout the ventricular system.


Click 68 year old man with primary CNS lymphoma. MRI brain T2 sequence without contrast.
Multiple intermediate T2 signal lesions in the ventricular system.


Click 68 year old man with primary CNS lymphoma. MRI FSPGR with contrast
Axial postcontrast FSPGR images demonstrate enhancing lesions throughout the ventricular system.


Click 68 year old man with primary CNS lymphoma. Axial DWI MRI image demonstrates slightly abnormal restricted diffusion in the right lateral ventricle lesions (white arrows). MRI: 3 Tesla magnet, Diffusion Weighted Imaging (TE 76.8, TR 7000), axial 5 mm slice.

Click 68 year old man with primary CNS lymphoma. MRI ADC sequence without contrast.
Axial images show multiple intraventricular masses with slightly low signal on the ADC map.