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Click 31 year old male with subependymoma. MRI Axial FLAIR image showing heterogeneous, hyperintense lesion in the left lateral ventricle (arrow), with moderate bilateral lateral ventricular hydrocephalus. Note the tiny signal void vessels in the lesion indicating high vascularity (arrowhead). MRI: 1.5 Tesla magnet, FLAIR (TE = 8000, TR = 147), axial, 5 mm slice.

Click 31 year old male with subependymoma. MRI coronal T2-weighted image showing heterogeneous T2 hyperintense lesion in the left lateral ventricle extending into the third ventricle causing supratentorial hydrocephalus. Hyperintense cystic areas are also seen in the lesion. Note linear signal void vessel denoting high vascularity of the lesion. MRI: 1.5 Tesla magnet, T2 (TE 5000, TR 87), coronal, 5mm slice.

Click 31 year old male with subependymoma. MRI axial post-contrast T1-weighted image demonstrating heterogeneous enhancement of the lesion. MRI: 1.5 Tesla magnet, T1 with contrast (TE = 466, TR = 9), axial, gadolinium (Prohance), 15 ml.

Click 31 year old male with subependymoma. MRI Axial T1 image showing large posterior left lateral ventricular diverticulum projecting medially and inferiorly into the quadrigeminal cistern, producing mass effect on the tectum and vermis. MRI: 1.5 Tesla magnet, T1 (TE =, TR =), axial, 5 mm slice.

Click 31 year old male with subependymoma. MRI Diffusion weighted sequence. DWI image shows focal areas of hyperintensity which correspond to areas of low ADC values on the ADC map, suggesting moderately hypercellular tumor. MRI: 1.5 Tesla magnet, DWI (TE = 110, TR = 12000, b=1000), axial, 5mm slice.

Click 31 year old male with subependymoma. MRI contrast enhanced dynamic susceptibility contrast perfusion image reveals multiple foci of high CBV within the tumor. MRI: 1.5 Tesla magnet, axial GRE EPI (TE = 40, TR = 2262).