Figure 4. (a) Axial T₂ weighted FSE image at mid pontine level from a 29-year-old patient with Type I neurofibromatosis and recent onset of facial pain. There is an ill defined mass within the pons on the right (arrow). (b) An image from a FLAIR sequence acquired in the coronal plane confirms the diffuse mass. The diagnosis was pontine glioma. Such tumours tend to run a relatively benign course in patients with neurofibromatosis.

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