ROBO1 and neoplasm: We now refined our data showing, by immunostaining and by RNAseq, that within the ROBO2low population, ROBO1 expression is a determining factor; ROBO2low;ROBO1high tumours corresponding to the patients with the poorest prognosis and ROBO2low;ROBO1low not differing from ROBO2high tumours in terms of disease-free survival (Fig. 7f, g).