Figure 2b. Meningioma after medulloblastoma. (a) CT scan of a 3-month-old boy shows a hypoattenuating mass in the cerebellar vermis with associated hydrocephalus. Surgical resection helped confirm medulloblastoma. (b) Contrast-enhanced CT scan obtained 12 years later shows an enhancing mass with calcifications and increased size posteriorly. (c) Sagittal T1-weighted MR image shows two hypointense masses of different sizes (arrows). (d) Axial contrast-enhanced T1-weighted MR image shows the larger mass with heterogeneous enhancement and peripheral cystic or necrotic areas (arrow) that represent meningioma. (e) Coronal T2-weighted MR image shows the smaller mass with heterogeneous intensity (arrow). The mass proved to be basal cell carcinoma. Several resections were performed for recurrence of meningioma, but the patient died.