Between Syk-c and MAP4 expression, a weak correlation was found in the whole cohort and also in HGSCs (rs = 0.312, P < 0.001, n = 265) and mucinous tumours (rs = 0.376, P = 0.018, n = 39), whilst a moderate correlation was found in CCCs (rs = 0.576, P < 0.001, n = 44); no correlation was detected between Syk and MAP4 expression in LGSCs or endometrioid tumours (data not shown). Here, MAP4 is linked to mucinous neoplasm.