Comparative expression analysis of miRNAs (miR-200b, miR-200c, let-7b and let-7d) in the plasma of 32 PC patients analyzed individually compared to plasma obtained from 10 normal subjects by using qRT-PCR. The line drawn at 1.0 represents average of normal subjects (n=10). The results showed a significant decrease in the expression of miR-200b, miR-200c, let-7b, let-7d (tumor suppressor genes) in almost all PC patients compared to normal subjects.