Recurrence of fourth ventricular choroid plexus papilloma with late occurrence of a spinal drop metastasis.

Choroid plexus papillomas are rare tumours, which occasionally spread both intracranially and down the spinal canal. Spinal metastasis has been reported infrequently and only once many years since the initial diagnosis. This is the first reported case of late recurrence, metastasis and transformation of a benign to an atypical lesion.