Cytogenetic analysis in human breast carcinoma. II. Seven cases in the triploid/tetraploid range investigated using direct preparations.

This report presents karyotypes of seven breast carcinomas with high ploidy from our total of 111 cases. These karyotypes were highly complex and there was no indication of a specific deletion of 16p12----pter as indicated by the previous analysis of some near-diploid tumors. A comparison of numerical changes did not demonstrate a common loss of chromosome #16 as in the near-diploid tumors, but an equivalent loss of chromosomes #8 and #13 was found.