title: Atypical teratoid/rhabdoid tumor: cytology and differential diagnosis in adults.
abstract: Atypical teratoid/rhabdoid tumors (AT/RTs) are malignant intracranial neoplasms that usually occur in the posterior fossa of children. They are characterized by cells with paranuclear rhabdoid inclusions, a mesenchymal and epithelial immunohistochemical profile, and 22q deletions with inactivation of the INI1/hSNF5 gene. Although they usually occur in young children, AT/RTs are being recognized in adults with increasing frequency. We report the cytologic features of an AT/RT from the cerebellum of a 45-year-old man and discuss the differential diagnosis in adults.
authors.affiliation: Department of Pathology, University of Texas Southwestern Medical Center, Dallas, 75390, USA. jack.raisanen@utsouthwestern.edu
authors.forename: Jack
authors.initials: J
authors.lastname: Raisanen
authors.forename: Kimmo J
authors.initials: KJ
authors.lastname: Hatanpaa
authors.forename: Bruce E
authors.initials: BE
authors.lastname: Mickey
authors.forename: Charles L
authors.initials: CL
authors.lastname: White
mesh_terms: D002528:Cerebellar Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D002892:Chromosomes, Human, Pair 22 / Q000235:genetics; D003937:Diagnosis, Differential; D006801:Humans; D007150:Immunohistochemistry; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D008875:Middle Aged; D025581:Neurofibromin 2 / Q000235:genetics; D011505:Protein-Tyrosine Kinases / Q000235:genetics; D011518:Proto-Oncogene Proteins / Q000235:genetics; D051562:Proto-Oncogene Proteins c-bcr; D018335:Rhabdoid Tumor / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D013724:Teratoma / Q000235:genetics / Q000378:metabolism / Q000473:pathology*
chemical_list: D025581:Neurofibromin 2; D011518:Proto-Oncogene Proteins; D011505:Protein-Tyrosine Kinases; C496613:BCR protein, human; D051562:Proto-Oncogene Proteins c-bcr