the core needle and surgical biopsy concordance to detect estrogen, progesterone, and her-2 receptors in breast cancer: a comparative study

Background &objectives: evaluation of estrogen receptor (er), progesterone receptor (pr), and (human epidermal growth factor receptor2) her-2 on core needle biopsies (cnbs) is increasingly in use to diagnosis early breast cancer, but its concordance with surgical excision (se) is not well documented. methods: the study included 100 formalin fixed, paraffinembedded specimens of invasive breast carcinoma archived in pathology department of cancer institute, tehran, iran, from 2011 to 2014. immunohistochemistry was applied to detect er, pr, and her-2. results: the current study findings indicated a significant correlation of 90% between cnb and se specimens for er expression. the correlation between cnb and se specimens was estimated as 81% and 97.3% for pr and her-2, respectively. discussion: cnb can be performed confidently to determine er and her-2. for pr, results obtained from cnb should be considered.