Analysis of the serial circulating tumor cell count during neoadjuvant chemotherapy in breast cancer patients.

a.sfakia shared this article with you from Inoreader Analysis of the serial circulating tumor cell count during neoadjuvant chemotherapy in breast cancer patients. Via pubmed: her2-positive breast... Analysis of the serial circulating tumor cell count during neoadjuvant chemotherapy in breast cancer patients. Sci Rep. 2020 Oct 15;10(1):17466 Authors: Gwark SC, Kim J, Lee CH, Kim YH, Kim MS, Hong SW, Choi MY, Jeon BH, Kwon NJ, Kim KY, Kim Y, Chang S, Yu JH, Park JY, Ahn JH, Jung KH, Kim SB, Lee HJ, Gong GY, Lee SB, Chung IY, Ko BS, Kim HJ, Lee JW, Son BH, Ahn SH Abstract We evaluated the prognostic implications of the circulating tumor cell (CTC) count in non-metastatic, HER2-negative breast cancer patients who failed to achieve pathologic complete response (pCR) after neoadjuvant chemotherapy (NCT). A total of 173, non-metastatic breast cancer patients treated with NCT were prospectively enrolled. CTCs were obtained from blood drawn pre-NCT and post-NCT using a SMART BIOPSY SYSTEM isolation kit (Cytogen Inc., Seoul, Korea) with immunofluorescence staining. Excluding 26 HER2-positive patients, Relapse-free survival (RFS) and overall survival (OS) related to the CTC count and the association of the CTC count with the treatment response to given therapy were analyzed in 147 HER2-negative patients. Among 147 HER2-negative patients, 28 relapses (19.0%) and 13 deaths (8.8%, all breast cancer-specific) were observed during a median follow-up of 37.3 months. One hundred and seven patients (72.8%) were hormone receptor-positive, and 40 pati ents (27.2%) had triple-negative breast cancer (TNBC). One or more CTCs were identified in 88 of the 147 patients (59.9%) before NCT and 77 of the 134 patients (52.4%) after NCT. In the entire HER2-negative patient cohort, the initial nodal status was the most significant factor influencing RFS and OS. In TNBC, 11 patients (27.5%) achieved pCR and patients that failed to achieve pCR with ≥ 5 CTCs after NCT, showed worse RFS (HR, 10.66; 95% CI, 1.80-63.07; p = 0.009) and OS (HR, 14.00; 95% CI, 1.26-155.53; p = 0.032). The patients with residual tumor and a high number of the CTCs after NCT displayed the worse outcome. These findings could provide justification to launch a future, well designed trial with longer follow-up data to obtain regulatory approval for clinical use of the assay, especially for the ER-positive, HER2-negative breast cancer subset. PMID: 33060768 [PubMed - in process] View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.