Large thoracocervical intraspinal neuroma: unusual clinical and neuroradiological findings.

The clinical and radiological findings of a giant cystic intraspinal cervical tumour are presented. Symptoms and signs suggesting a polyneuropathy were misleading. On myelography the tumour appeared as a solid mass, but its size was distinctly underestimated. MRI demonstrated the true extent (from C4 to T4) and the cystic structure of the tumour. The histo-pathological diagnosis was fibrillary neuroma (WHO grade I).