Hormone responsive breast cancer is usually determined by the presence of estrogen
receptors (ER) or progesterone receptors (PR) on primary invasive breast cancers. Adjuvant …

Background: The importance of establishing hormone receptor status of tumors for the
treatment of women with hormone receptor-positive breast cancer has been emphasized …

1009 Background: In the metastatic situation therapy management is often based on primary
tumor characteristics such as estrogen receptor (Er) and progesterone receptor (Pr) status …

BACKGROUND: Changes in the receptor profile of primary breast cancers to their
metastases (receptor conversion) have been described for the estrogen receptor α (ERα) …

BACKGROUND: The purposes of this study were to address a persistent controversy as to
whether the ER status of a primary tumor remains stable during progression to metastasis …

Objective This retrospective study investigated the association between hormone receptor
(HR) conversion and survival in breast cancer patients. Methods Estrogen receptor (ER) and …

Background Hormone receptor and HER-2/neu discordance between the primary lesion and
first metastasis has been reported. This study was performed to determine further biomarker …

Background: Changes in the receptor profile between primary and metastatic breast cancer
tissue have been suggested. The degree of hormone receptor discordance in archival …

PURPOSE Up to 30% to 40% of metastases from hormone receptor-positive primary breast
cancer do not respond to endocrine therapy. We studied how often hormone receptor status …

Background. The primary aim of this retrospective study was to investigate intraindividual
correlation of estrogen receptor (ER) status, progesterone receptor (PR) status, and HER2 …