DNA analysis by flow cytometry, response to endocrine treatment and prognosis in advanced carcinoma of the breast.

The relationship between DNA content of mammary cancer and subsequent response to endocrine therapy was studied in 136 patients with advanced disease. All were treated with tamoxifen or ovarian ablation as first-line systemic therapy after relapse and were evaluable for response according to UICC criteria. DNA characterisation by flow cytometry was used on formalin fixed paraffin-embedded samples of tumour. Tumours were grouped according to DNA index into diploid (n = 52, 38%), 'tetraploid' (n = 46, 34%) and 'other DNA-aneuploid' (n = 38, 28%). The highest proportion of oestrogen receptor positive tumours (ER + ve) was found in the 'tetraploid' tumours (38/46, 85%, Chi-square = 8.53, P less than 0.02), and response rates, (SD + PR + CR), were 26/52 (50%), 34/46 (74%), and 15/38 (39%) respectively (Chi-square = 10.88, P less than 0.005). Patients with diploid or 'tetraploid' tumours survived longer and stayed in remission longer than those with 'other DNA-aneuploid' tumours. We suggest that 'tetraploid' or 'near tetraploid' human mammary tumours may comprise a distinct group of endocrine responsive tumours within the overall group of aneuploid tumours. The conventional interpretation of DNA histograms, grouping into diploid and aneuploid, may be masking important features of some tumour groups.

• Publication year

  1987

• Venue

  British Journal of Cancer

• Publication date

  1987-05-01

• Fields of study

  Medicine

• Identifiers
  DOI 10.1038/bjc.1987.113PMID 3038158PMCID 2001728
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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