title: Discrepancy between computed tomography and magnetic resonance imaging in a case of medulloblastoma.
abstract: In a 2-year-old girl with signs and symptoms of a posterior fossa tumor, the computed tomographic scan showed what appeared to be a brain stem glioma. However, magnetic resonance imaging (MRI) demonstrated the lesion to be extrinsic to the brain stem. Posterior fossa exploration disclosed a medulloblastoma filling the 4th ventricle. This discrepancy in imaging techniques points out the usefulness of MRI in the evaluation and treatment of posterior fossa lesions.
mesh_terms: D001933:Brain Stem / Q000473:pathology; D002528:Cerebellar Neoplasms / Q000473:pathology* / Q000601:surgery; D002531:Cerebellum / Q000473:pathology; D002552:Cerebral Ventricles / Q000473:pathology; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008527:Medulloblastoma / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed