PTBP1 and colorectal carcinoma: However, in 158 patients with stages II/III CRC, the expression level of PTBP1 were not related with any of the clinicopathological parameters (Table 1) (the data of 202 CRC patients are shown in Supplementary Table 3) but high PTBP1 expression was more frequently in CRC with nodal involvement (50.7% in Stage II vs 61.4% in Stage III, P =0.17).