P286 Quadruple Negative Breast Cancer (QNBC): outcomes in survival and comparison with the classic phenotype of TNBC. (April 2023) - Koura, S.; Marinopoulos, S.; Papachatzopoulou, E.; Papapanagiotou, I.K.; Metaxas, G.I.; Giannos, A.; Goula, K.; Porfiri, K.; Dimopoulou, C.; Dimitrakakis, C.