title: A unique occurrence of a cerebral atypical teratoid/rhabdoid tumor in an infant and a spinal canal primitive neuroectodermal tumor in her father.
abstract: This report describes the clinical, pathological, immunohistochemical and genetic data of two rare malignant neoplasms of the central nervous system (CNS)--a cerebral atypical teratoid/rhabdoid tumor (AT/RT) in a 5-month-old girl and a spinal canal primitive neuroectodermal tumor (PNET) in her father. Despite aggressive treatment, both tumors were fatal, displaying extensive local recurrence and diffuse neoplastic dissemination. The paraffin-embedded tumor tissue samples were analyzed using a dual-color FISH with a locus specific LSI22q (BCR) probe. In the AT/RT tissue, a loss of BCR locus was observed in a significant proportion of the cells in contrast to the PNET specimen where the majority of nuclei did not reveal any loss of the BCR region. No mutations in exon 5 and no changes in SNP of intron 5 of hSNF/INI1 gene were found. In addition, analysis of loss of heterozygosity (LOH) was performed using a panel of 15 microsatellite markers of chromosome 22. No LOH were found in both tumor tissues. In both cases no constitutional mutations of gene TP53 were found. Analysis of the TP53 mutations in the tumor tissues revealed that the PNET, not the AT/RT tumor, was homozygous for a missense mutation at codon 175 (CGC ==> CAC). Thus, our findings emphasize the genetic differences between the two specimens and suggest that the occurrence of these two aggressive tumors of CNS in one family could be coincidental.
authors.affiliation: Department of Pathology, Medical University of Gdansk, Poland.
authors.forename: Ewa
authors.initials: E
authors.lastname: Izycka-Swieszewska
authors.forename: Maria
authors.initials: M
authors.lastname: Debiec-Rychter
authors.forename: Bartosz
authors.initials: B
authors.lastname: Wasag
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Wozniak
authors.forename: Dariusz
authors.initials: D
authors.lastname: Gasecki
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Plata-Nazar
authors.forename: Jacek
authors.initials: J
authors.lastname: Bartkowiak
authors.forename: Jerzy
authors.initials: J
authors.lastname: Lasota
authors.forename: Janusz
authors.initials: J
authors.lastname: Limon
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000235:genetics* / Q000473:pathology; D002574:Cervical Vertebrae; D002892:Chromosomes, Human, Pair 22 / Q000235:genetics*; D005260:Female; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007223:Infant; D008297:Male; D008577:Meningeal Neoplasms / Q000235:genetics / Q000473:pathology; D018242:Neuroectodermal Tumors, Primitive / Q000235:genetics* / Q000473:pathology; D015513:Oncogene Proteins / Q000032:analysis; D011505:Protein-Tyrosine Kinases; D011518:Proto-Oncogene Proteins; D051562:Proto-Oncogene Proteins c-bcr; D018335:Rhabdoid Tumor / Q000235:genetics* / Q000473:pathology; D013115:Spinal Canal / Q000473:pathology; D013125:Spinal Neoplasms / Q000235:genetics* / Q000473:pathology; D013724:Teratoma / Q000235:genetics* / Q000473:pathology
chemical_list: D015513:Oncogene Proteins; D011518:Proto-Oncogene Proteins; D011505:Protein-Tyrosine Kinases; C496613:BCR protein, human; D051562:Proto-Oncogene Proteins c-bcr