title: Atypical teratoid/rhabdoid tumors.
abstract: METHODS
  We describe three cases of atypical ATRT that were identified at the Children's Hospital of Eastern Ontario.
  
  
  CONCLUSIONS
  Over the past decade, atypical teratoid/rhabdoid tumors (ATRTs) of the central nervous system have emerged as a distinct entity. This tumor is typically misdiagnosed as a primitive neuroectodermal tumor (PNET)/medulloblastoma. The unique immunohistochemistry profile of an ATRT helps distinguish it from a PNET/medulloblastoma. This is of clinical importance because the prognosis of a patient with an ATRT is worse than that of a PNET/medulloblastoma despite aggressive surgical treatment with or without adjuvant chemotherapy and radiation therapy.
authors.affiliation: Division of Neurosurgery, Children's Hospital of Eastern Ontario, University of Ottawa, 401 Smyth Road, Ottawa, Ontario K1H 8L1, Canada.
authors.forename: Tommy
authors.initials: T
authors.lastname: Dang
authors.forename: Michael
authors.initials: M
authors.lastname: Vassilyadi
authors.forename: Jean
authors.initials: J
authors.lastname: Michaud
authors.forename: Carmencita
authors.initials: C
authors.lastname: Jimenez
authors.forename: Enrique C G
authors.initials: EC
authors.lastname: Ventureyra
mesh_terms: D001932:Brain Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D008527:Medulloblastoma / Q000175:diagnosis; D011379:Prognosis; D018335:Rhabdoid Tumor / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy; D013724:Teratoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome