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Darlix, Amélie; Louvel, Guillaume; Fraisse, Julien; Jacot, William; Brain, Etienne; Debled, Marc; Mouret-Reynier, Marie Ange; Goncalves, Anthony; Dalenc, Florence; Delaloge, Suzette; Campone, Mario; Augereau, Paule; Ferrero, Jean Marc; Levy, Christelle; Fumet, Jean-David; Lecouillard, Isabelle; Cottu, Paul; Petit, Thierry; Uwer, Lionel; Jouannaud, Christelle; Leheurteur, Marianne; Dieras, Véronique; Robain, Mathieu; Chevrot, Michaël; Pasquier, David; Bachelot, Thomas
British journal of cancer, 12/2019, Volume: 121, Issue: 12Journal Article
Metastatic breast cancer (MBC) behaviour differs depending on hormone receptors (HR) and human epidermal growth factor receptor (HER2) statuses. The kinetics of central nervous system (CNS) metastases (CNS metastasis-free survival, CNSM-FS) and subsequent patient's prognosis (overall survival, OS) according to the molecular subtype were retrospectively assessed in 16703 MBC patients of the ESME nationwide multicentre MBC database (Kaplan-Meier method). CNS metastases occurred in 4118 patients (24.6%) (7.2% at MBC diagnosis and 17.5% later during follow-up). Tumours were HER2-/HR+ (45.3%), HER2+/HR+ (14.5%), HER2+/HR- (14.9%) and triple negative (25.4%). Median age at CNS metastasis diagnosis was 58.1 years (range: 22.8-92.0). The median CNSM-FS was 10.8 months (95% CI: 16.5-17.9) among patients who developed CNS metastases. Molecular subtype was independently associated with CNSM-FS (HR = 3.45, 95% CI: 3.18-3.75, triple-negative and HER2-/HR+ tumours). After a 30-month follow-up, median OS after CNS metastasis diagnosis was 7.9 months (95% CI: 7.2-8.4). OS was independently associated with subtypes: median OS was 18.9 months (HR = 0.57, 95% CI: 0.50-0.64) for HER2+/HR+ , 13.1 months (HR = 0.72, 95% CI: 0.65-0.81) for HER2+/HR-, 4.4 months (HR = 1.55, 95% CI: 1.42-1.69) for triple-negative and 7.1 months for HER2-/HR+ patients (p <0.0001). Tumour molecular subtypes strongly impact incidence, kinetics and prognosis of CNS metastases in MBC patients. NCT03275311.
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