Turkish National Colon Cancer Registry

e12646 Background: Colorectal cancers (CRC) have become the 3rd most common cancer in Turkey with increasing incidence over the years. Studies investigating the clinical and biologic features of CRC Turkey are small retrospective case series providing limited information. We initiated a Turkish National CRC Registry program in October 2012 to define clinical and pathological variables of CRC. Methods: Pts presenting to medical oncology clinics were prospectively registered in 28 centers nationwide. Pt demographics and clinicopathological characteristics were recorded. Results: 6143 pts (mean age 58.2±12.3) were analyzed (57% males). Mean ages of males were higher (59 vs 57 yrs, p = 0.001). Adenocarcinoma was the most common histology (97.8%). Initial stages at diagnosis: I (5.4%), II (29.6%), III (33.8%) and IV (20.2%), unknown (9.8%). Pts from Eastern Turkey were younger (56 vs 59, p < 0.001) with a more advanced stage (metastatic pts, 26.5% vs 18.4%). T stage was unknown in 22%, and T3 (46%) and T4 (20%...