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MR images two weeks after removal of the teratoma: (a) T2 weighted (TR 4500, TE 94) in coronal plane; and (b) T1-weighted (TR 9.7, TE 4.1) contrast-enhanced sequence in sagittal plane, showing recurrence. Tumour is seen occupying the oral cavity with extension into the left temporal fossa (black arrow) and brain stem compression (white arrow). There is evidence of moderate hydrocephalus.
