PMID- 29154173 OWN - NLM STAT- MEDLINE DCOM- 20171212 LR - 20180104 IS - 1879-0852 (Electronic) IS - 0959-8049 (Linking) VI - 87 DP - 2017 Dec TI - Prognostic value of tumour-infiltrating lymphocytes in small HER2-positive breast cancer. PG - 164-171 LID - S0959-8049(17)31351-5 [pii] LID - 10.1016/j.ejca.2017.10.011 [doi] AB - BACKGROUND: The standard treatment for patients with small, node-negative, human epidermal growth factor receptor type 2 (HER2)-positive breast cancer (BC) is still controversial. Our aim was to assess the prognostic role of tumour-infiltrating lymphocytes (TILs) in patients with stage pT1a-b HER2-positive BC. PATIENTS AND METHODS: Haematoxylin and eosin slides from node-negative, pT1a-b HER2-positive BC surgical specimens were retrieved from pathology archives to assess TILs and their association with outcome. RESULTS: TILs were evaluated in 205 patients with HER2-positive, pT1a-b tumours, who underwent breast surgery between 1997 and 2009 at the European Institute of Oncology. At a median follow-up of 11 years, we did not observe any association between the presence of TILs, either assessed as a continuous or dichotomous variable (<50 versus >/= 50%), and outcome. Within the subgroup of patients with pT1a tumours who did not receive any adjuvant therapy (36/97 patients), the rate of disease-free survival events was lower in lymphocyte-predominant BC (LPBC) as compared with non-LPBC patients (p = 0.066). CONCLUSIONS: TILs cannot be used as a prognostic biomarker in pT1a-b HER2-positive BC. Additional biomarkers are needed for selecting patients with stage I HER2-positive BC who candidate to adjuvant therapy de-escalation. CI - Copyright (c) 2017 Elsevier Ltd. All rights reserved. FAU - Criscitiello, Carmen AU - Criscitiello C AD - Division of Early Drug Development, European Institute of Oncology, Milano, Italy. FAU - Bagnardi, Vincenzo AU - Bagnardi V AD - Division of Epidemiology and Biostatistics, European Institute of Oncology, Milano, Italy; Department of Statistics and Quantitative Methods, University of Milan-Bicocca, Milano, Italy. FAU - Pruneri, Giancarlo AU - Pruneri G AD - Department of Pathology, Biobank for Translational Medicine Unit, European Institute of Oncology, Italy; Department of Haematology and Oncology, University of Milano, Italy. FAU - Vingiani, Andrea AU - Vingiani A AD - Department of Pathology, Biobank for Translational Medicine Unit, European Institute of Oncology, Italy. FAU - Esposito, Angela AU - Esposito A AD - Division of Early Drug Development, European Institute of Oncology, Milano, Italy. FAU - Rotmensz, Nicole AU - Rotmensz N AD - Division of Epidemiology and Biostatistics, European Institute of Oncology, Milano, Italy. FAU - Curigliano, Giuseppe AU - Curigliano G AD - Division of Early Drug Development, European Institute of Oncology, Milano, Italy; Department of Haematology and Oncology, University of Milano, Italy. Electronic address: Giuseppe.curigliano@ieo.it. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20171115 PL - England TA - Eur J Cancer JT - European journal of cancer (Oxford, England : 1990) JID - 9005373 RN - 0 (Biomarkers, Tumor) RN - EC 2.7.10.1 (ERBB2 protein, human) RN - EC 2.7.10.1 (Receptor, ErbB-2) SB - IM MH - Adult MH - Aged MH - Biomarkers, Tumor/*analysis MH - Breast Neoplasms/chemistry/*immunology/mortality/therapy MH - Chemotherapy, Adjuvant MH - Disease-Free Survival MH - Female MH - Humans MH - Lymphocytes, Tumor-Infiltrating/*immunology MH - Mastectomy MH - Middle Aged MH - Neoplasm Staging MH - Predictive Value of Tests MH - Receptor, ErbB-2/*analysis MH - Risk Factors MH - Time Factors MH - Treatment Outcome OTO - NOTNLM OT - HER2 OT - Stage pT1a-b breast cancer OT - Tumour-infiltrating lymphocytes EDAT- 2017/11/21 06:00 MHDA- 2017/12/13 06:00 CRDT- 2017/11/21 06:00 PHST- 2017/09/30 00:00 [received] PHST- 2017/10/08 00:00 [accepted] PHST- 2017/11/21 06:00 [pubmed] PHST- 2017/12/13 06:00 [medline] PHST- 2017/11/21 06:00 [entrez] AID - S0959-8049(17)31351-5 [pii] AID - 10.1016/j.ejca.2017.10.011 [doi] PST - ppublish SO - Eur J Cancer. 2017 Dec;87:164-171. doi: 10.1016/j.ejca.2017.10.011. Epub 2017 Nov 15.