title: Chromosome 8 numerical aberrations in stage II invasive ductal carcinoma: correlation with patient outcome and poor prognosis.
abstract: Aberrations in chromosome 8 are common in breast cancer. However, the relationship between numerical aberrations of chromosome 8 and clinical behavior (especially prognosis) in breast cancer is not well understood. In this study, a total of 40 specimens of stage II invasive ductal carcinomas (IDCs) was analyzed by fluorescence in situ hybridization (FISH) with a chromosome 8 centromere-specific probe and DNA flow cytometry (stage IIA: 20 cases; stage IIB: 20 cases). All cases were followed for at least 5.7 yr (mean: 7.5 yr; median: 7.7 yr) after surgery or until death. Single (loss), double, and triple or more signals (gain) of chromosome 8 were found in 7.6 +/- 3.5% (range: 2-16%; median: 7%), 53.7 +/- 13.2% (range: 25-81%, median: 53%), and 38.7 +/- 13.2% (range: 17-65%, median: 38%), respectively, of tumors. The frequencies of chromosome 8 gain and disomy correlated with patient outcome (respectively p < 0.05 and p < 0.01). When median ratios of chromosome 8 loss, disomy, and gain were used as the cutoff values, the survival curves revealed that patients in the low-frequency group survived significantly longer than those in the high-frequency group for chromosome 8 gain (p < 0.05), and patients in the high-frequency group survived significantly longer than those in the low-frequency group for chromosome 8 disomy (p < 0.05). Poor prognosis was not associated with age, tumor size, lymph node metastasis, histologic type, TNM stage, estrogen-receptor status, progesterone- receptor status, or DNA ploidy. Our results suggest that the frequencies of chromosome 8 gain and disomy is a potentially useful parameter for predicting prognosis of stage II IDCs.
authors.affiliation: School of Health Sciences, Nagasaki University, Nagasaki City, Nagasaki 852-8102, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Tagawa
authors.forename: Toru
authors.initials: T
authors.lastname: Yasutake
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Ikuta
authors.forename: Tadayuki
authors.initials: T
authors.lastname: Oka
authors.forename: Ryusuke
authors.initials: R
authors.lastname: Terada
mesh_terms: D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology; D044584:Carcinoma, Ductal / Q000235:genetics* / Q000473:pathology; D002869:Chromosome Aberrations; D002898:Chromosomes, Human, Pair 8; D005260:Female; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D009367:Neoplasm Staging; D011379:Prognosis; D016019:Survival Analysis