Roberto A Leon-Ferre, Sarah Flora Jonas, Roberto Salgado, Sherene Loi, Vincent de Jong, Jodi M Carter, Torsten O Nielsen, Samuel Leung, Nazia Riaz, Stephen Chia, Gérôme Jules-Clément, Giuseppe Curigliano, Carmen Criscitiello, Vincent Cockenpot, Matteo Lambertini, Vera J Suman, Barbro Linderholm, John W M Martens, Carolien H M van Deurzen, A Mieke Timmermans, Tatsunori Shimoi, Shu Yazaki, Masayuki Yoshida, Sung-Bae Kim, Hee Jin Lee, Maria Vittoria Dieci, Guillaume Bataillon, Anne Vincent-Salomon, Fabrice André, Marleen Kok, Sabine C Linn, Matthew P Goetz, Stefan Michiels
IMPORTANCE: The association of tumor-infiltrating lymphocyte (TIL) abundance in breast cancer tissue with cancer recurrence and death in patients with early-stage triple-negative breast cancer (TNBC) who are not treated with adjuvant or neoadjuvant chemotherapy is unclear. OBJECTIVE: To study the association of TIL abundance in breast cancer tissue with survival among patients with early-stage TNBC who were treated with locoregional therapy but no chemotherapy. DESIGN, SETTING, AND PARTICIPANTS: Retrospective pooled analysis of individual patient-level data from 13 participating centers in North America (Rochester, Minnesota; Vancouver, British Columbia, Canada), Europe (Paris, Lyon, and Villejuif, France; Amsterdam and Rotterdam, the Netherlands; Milan, Padova, and Genova, Italy; Gothenburg, Sweden), and Asia (Tokyo, Japan; Seoul, Korea), including 1966 participants diagnosed with TNBC between 1979 and 2017 (with follow-up until September 27, 2021) who received treatment with surgery with or without radiotherapy but no adjuvant or neoadjuvant chemotherapy...
April 2, 2024: JAMA