Heafner M D, Schut L, Packer R J, Bruce D A, Bilaniuk L T, Sutton L N
Neurosurgery. 1985 Sep;17(3):487-9. doi: 10.1227/00006123-198509000-00016.
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.
