Magnetic resonance imaging differential diagnosis of brainstem lesions in children

Figure 17 Tectal glioma in neurofibromatosis type 1. A 7-year-old boy with a diagnosis of Neurofibromatosis type 1. T2 weighted images (A-C) show a small area of hyperintense signal, increasing in size over time with a cystic component. Contrast enhanced T1-weighted images (D-F) show a mural nodule of enhancement 2 and 3 years after the initial diagnosis. Note the multiple focal hyperintense lesions located at the basilar portion of the midbrain (white arrows in B and C) that are stable over time, defined as typical unidentified bright objects, observed in these patients.