title: Clusters of chromosome 9 aberrations are associated with clinico-pathologic subsets of non-Hodgkin's lymphoma.
abstract: In this study we analyzed nonrandom aberrations affecting chromosome 9 in a series of 426 consecutively ascertained, karyotypically abnormal non-Hodgkin's lymphoma (NHL) tumors derived from 407 patients. Cytogenetic abnormalities were correlated with clinical, histologic, and immunologic features. Structural abnormalities of chromosome 9 were identified in 60 specimens derived from 59 patients. The recurring abnormalities among these were associated with 4 clinico-pathologic subsets. The first comprised 7 cases of t(9;14)(p13;q32), 6 of which had small lymphocytic lymphoma, plasmacytoid subtype, and an indolent clinical course. The second group included 12 cases with breaks at 9q11-13 and diffuse lymphomas with a large-cell component and a typical response to combination chemotherapy. The third group was comprised of 7 cases with 9q deletions, with a common deleted region encompassing 9q31-32. These cases were characterized by diffuse B-cell histology, young age, and poor clinical outcome. The fourth subset included 5 intermediate- to high-grade T-cell tumors with breaks at 9q34. This analysis of chromosome 9 aberrations in NHL comprises the first such effort based on a large series of tumors. We identify and report here new clinico-pathologic subsets with shared abnormalities of chromosome 9, which should facilitate new approaches to the analysis of the etiology and clinical behavior of NHL.
authors.affiliation: Laboratory of Cancer Genetics, Sloan-Kettering Institute, New York, NY 10021.
authors.forename: K
authors.initials: K
authors.lastname: Offit
authors.forename: N Z
authors.initials: NZ
authors.lastname: Parsa
authors.forename: S C
authors.initials: SC
authors.lastname: Jhanwar
authors.forename: D
authors.initials: D
authors.lastname: Filippa
authors.forename: M
authors.initials: M
authors.lastname: Wachtel
authors.forename: R S
authors.initials: RS
authors.lastname: Chaganti
mesh_terms: D001706:Biopsy; D002869:Chromosome Aberrations; D002872:Chromosome Deletion; D025063:Chromosome Disorders; D002881:Chromosomes, Human, Pair 12; D002899:Chromosomes, Human, Pair 9; D015321:Gene Rearrangement; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D008228:Lymphoma, Non-Hodgkin / Q000235:genetics* / Q000473:pathology; D014178:Translocation, Genetic