title: Oestrogen and progesterone receptor assays in breast tumours. The Prince Henry's Hospital experience, 1983-1990.
abstract: OBJECTIVE
  To present and analyse the results of eight years of experience (1983-1990) in breast tumour receptor analysis.
  
  
  METHODS
  All female primary breast tumour samples received (4683) were analysed for seasonal variation, patient age, relative risk index, oestrogen receptor (ER) and progesterone receptor (PR) status, ER and PR status as a function of age, ER and PR levels as a function of age, and ER and PR levels as a function of month of analysis.
  
  
  METHODS
  The assays were done at the Medical Research Centre, Prince Henry's Hospital, Melbourne, as a non-profit service to surgeons, oncologists and pathologists.
  
  
  CONCLUSIONS
  The numbers of samples referred for assay increased progressively each year, from 473 in 1983 to 1097 in 1990, but the receptor status (ER +/-, PR +/-) appeared not to vary from year to year. ER+PR+ tumours were the most common in all age groups, steadily increasing from between 50% and 60% in premenopausal women to 70% or more in those aged over 80. In postmenopausal women, levels of ER in ER+ tumours were three times those in premenopausal women; PR levels in PR+ tumours, however, were bimodal, with higher levels in the age groups 35-49 and 70-89 years than in women aged 50-69 years. No significant seasonal variation was seen, and the overall patterns of receptor status are similar to those seen in Northern hemisphere studies.
authors.affiliation: Prince Henry's Institute of Medical Research, Monash Medical Centre, Clayton, Vic.
authors.forename: P T
authors.initials: PT
authors.lastname: Pearce
authors.forename: K M
authors.initials: KM
authors.lastname: Myles
authors.forename: J W
authors.initials: JW
authors.lastname: Funder
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000737:chemistry*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011960:Receptors, Estrogen / Q000032:analysis*; D011980:Receptors, Progesterone / Q000032:analysis*
chemical_list: D011960:Receptors, Estrogen; D011980:Receptors, Progesterone