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T2-weighted sagittal pediatric brain MRI. Characteristic diagnostic T2-weighted MRI of pediatric DIPG. Note brainstem which demonstrates a diffuse expansile hyperintense lesion in the pons (arrow). These tumors are surgically unresectable due to their poorly circumscribed border and highly eloquent location. Where safe-entry zones are obeyed and neuromonitoring is employed, incisional biopsies under direct observation can be performed
