Prognostic implications of receptor discordance between primary and recurrent breast cancer

Akiko Matsumoto, Hiromitsu Jinno, Takeshi Murata, Tomoko Seki, Maiko Takahashi, Tetsu Hayashida, Kaori Kameyama, Yuukou Kitagawa

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Background: Discordance rates of hormone receptor (HR) and human epidermal growth factor-2 (HER2) status between primary and recurrent breast cancer were reported to be in the wide range of 10–40 %, although its prognostic relevance remains to be elucidated.

Methods: Fifty-five breast cancer patients had biopsies or resections of recurrent lesions. Pathological assessments of the HR and HER2 status of primary and recurrent lesions were performed in a single laboratory at Keio University Hospital. Tumors were classified as luminal (HR+ and HER2−), luminal/HER2 (HR+ and HER2+), HER2 (HR− and HER2+), or triple negative (HR− and HER2−).

Results: Discordance rates in estrogen receptor (ER), progesterone receptor (PgR) and HER2 status between primary tumors and recurrent lesions were 16.4, 30.9 and 10.2 %, respectively. Overall, 14 patients (25.5 %) changed subtypes at recurrent lesions. Patients with a gain in ER and PgR status had a significantly longer disease-free interval compared with the corresponding concordant-negative patients (ER: 99.0 vs. 18.5 months, p = 0.037, PgR: 141.0 vs. 24.4 months, p = 0.011). Patients with a loss of HER2 status experienced a trend toward shorter time to progression, compared with patients who maintained HER2 positivity (4.0 vs. 18.4 months, p = 0.051).

Conclusions: Discordance in receptor status between primary and recurrent breast cancers were seen in 10–30 %. A gain in HR status was significantly associated with better prognosis.

Original languageEnglish
JournalInternational Journal of Clinical Oncology
DOIs
Publication statusAccepted/In press - 2014 Oct 29

Keywords

  • Biopsy
  • Breast cancer
  • Discordance
  • Prognosis
  • Receptor
  • Recurrence

ASJC Scopus subject areas

  • Oncology
  • Surgery
  • Hematology

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