Revista chilena de radiología
versión ISSN 0717-9308
LABBE A, María Ignacia; MIRANDA G, Gonzalo y LAS HERAS A, Facundo. Melanotic schwannoma: A case report and literature review. Rev. chil. radiol. [online]. 2012, vol.18, n.1, pp. 5-8. ISSN 0717-9308. doi: 10.4067/S0717-93082012000100003.
Schwannomas are benign neoplastic lesions which originate from Schwann cells. A rare variant is the melanotic schwannoma. Accurate discrimination of this entity may be difficult due to differential diagnosis with malignant tumors, especially with metastatic melanoma, which has a potential ominous prognosis and a radically different treatment. We report the case of a 60-year-old woman with neurological sensorimotor involvement, presenting progressive caudo-cranial involvement more pronounced on the right side. MRI showed an intradural extramedullary mass with hyperintense signal intensity on T1 and T2 images, whereas no significant increase in signal intensity of the spinal cord was observed. Tumor was resected and sent for anatomopathological analysis which revealed a non-psammomatous melanotic schwannoma.
Palabras clave : Intradural extramedullar mass; Melanotic schwannoma; MRI.