Malignant peripheral nerve sheath tumour of the trigeminal nerve: case report and literature review.

Although all trigeminal nerve schwannomas are uncommon, malignant schwannomas are extraordinarily rare. We describe a patient who presented with clinical and radiological features of a trigeminal schwannoma; however, pathological analysis showed a malignant peripheral nerve sheath tumour (WHO Grade IV). We discuss these extremely rare tumours and their management.