BOC and gastric cancer: Expression levels of Shh signaling pathway genes (IHH, BOC, and RAB23) and their regulatory miRNAs (miR-195-5p, miR-6738-3p, and miR-509-3-5p) were evaluated in 50 gastric cancer patients using comparative relative real time PCR, and by comparing the expression in tumor tissues with their paired normal counterpart tissues.