title: Cytogenetic features of twenty-six primary breast cancers.
abstract: Tumor preparations from 26 primary breast cancers were studied cytogenetically with G-banding, using a direct technique, synchronized short-term culture, or both. Two tumors had normal karyotypes, and 24 (92%) had chromosomal abnormalities. Nineteen tumors had chromosome 1 rearrangements, with 10 cases (40%) displaying distal short arm translocations (1p36). Other frequent breakpoints occurred at 3p21, 6q22-27, 11q21-25, 16q22-24, 17p, and 19q13. To seek primary rather than secondary cytogenetic changes, attention was directed toward tumors with diploid-range karyotypes (32-57 chromosomes per cell). Of four such tumors, three exhibited nonrandom involvement of chromosome 16q22. This, together with previously reported data, suggests that deletion or rearrangement of chromosome 16q21-24 may be a primary or specific event in a subset of breast cancers.
authors.affiliation: Department of Surgery, University of Melbourne, Australia.
authors.forename: P J
authors.initials: PJ
authors.lastname: Hainsworth
authors.forename: K L
authors.initials: KL
authors.lastname: Raphael
authors.forename: R G
authors.initials: RG
authors.lastname: Stillwell
authors.forename: R C
authors.initials: RC
authors.lastname: Bennett
authors.forename: O M
authors.initials: OM
authors.lastname: Garson
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000235:genetics / Q000473:pathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology; D002278:Carcinoma in Situ / Q000235:genetics / Q000473:pathology; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000235:genetics / Q000473:pathology; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D005260:Female; D006801:Humans; D007621:Karyotyping; D008875:Middle Aged; D011003:Ploidies