Nuchal fibrocartilaginous pseudomotor. Case report and review of the literature.

The case of a 30-year-old woman who, many years after a trauma to the neck, developed a hard tissue mass in the posterior midline at C5-C6 level is reported. The patient underwent surgical excision of the mass. Nucal fibrocartilaginous pseudotumor (NFP) was diagnosed. This is a very rare non-neoplastic lesion, probably arising throug a post-traumatic metaplasia of the nuchal ligament, and only 14 cases have been reported to date in the literature. The clinicopathologic and neuroradiologic features of NFP are described.