title: Cerebral malignant nerve sheath tumor, triton tumor variant: case report.
abstract: A case of a cerebral malignant triton tumor in a 3-year-old boy with a 2-month history of frontal headache and no clinical evidence of neurofibromatosis is reported. The computed tomography (CT) scan showed a large, irregular tumor in the right parietooccipital lobe. A partial surgical resection was performed. Histologically, the tumor was highly cellular and consisted of spindle cells with hyperchromatic and pleomorphic nuclei. Focally, neoplastic cells with rhabdomyoblastic features were found. The immunohistochemical study showed that tumor cells were positive for S-100 protein and CD57, and the rhabdomyoblasts expressed desmin, Myo-D1, and myoglobin. During the postoperative period, a massive intraparenchymal hemorrhage was identified and surgical drainage was performed. The patient worsened and died 10 days after the first surgery. Postmortem study was not authorized. Six cases of cerebral malignant nerve sheath tumor have been described; however, primary intraparenchymal malignant triton tumor has not been previously described.
authors.affiliation: Department of Pathology, Instituto Nacional de Pediatría, Insurgentes Sur #3700-C, Col Insurgentes Cuicuilco, 04530, Mexico City, DF, Mexico. lbq123@yahoo.com
authors.forename: Leticia
authors.initials: L
authors.lastname: Bornstein-Quevedo
authors.forename: Fabiola
authors.initials: F
authors.lastname: Peralta-Olvera
authors.forename: Alfonso
authors.initials: A
authors.lastname: Marhx-Bracho
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Rodríguez-Jurado
authors.forename: Beatriz
authors.initials: B
authors.lastname: De Leon-Bojorge
mesh_terms: D001932:Brain Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000503:physiopathology; D002675:Child, Preschool; D017809:Fatal Outcome; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D018317:Nerve Sheath Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000503:physiopathology; D014057:Tomography, X-Ray Computed