Intracranial melanotic schwannoma: a case report of recurrence with extra- and intradural manifestation two decades after initial diagnosis and treatment.

摘要

Melanotic schwannoma (MS) is a very rare nerve sheath tumor characterized by melanin-producing cells that display ultrastructural features of Schwann cells [24] . This type of tumor was fi rst described in 1932 [17] and occurs primarily in the paraspinal region, originating from the spinal nerve roots or sympathetic ganglia. Craniofacial or intracranial locations are rare [15, 21] . However, extraneural locations such as skin, soft tissues, bone and viscera have also been described [5, 7] . In a minority of cases, MS may have multiple nodules [6, 26] .