59P Primary tumour and circulating tumour cell (CTC) copy number alterations (CNAs) in triple negative breast cancer (TNBC) patients (pts) treated with neoadjuvant chemotherapy (NAC). - Di Cosimo, S.; Silvestri, M.; Dugo, M.; Vismara, M.; Reduzzi, C.; Pruneri, G.; Folli, S.; Cappelletti, V.; Daidone, M.G. (Annals of Oncology, 2020)