“…On the other hand, colorectal cancer is relatively rare as an origin of DCBM, with only 27 cases having been reported between 1984 and 2013 in Japan (table 2 ) [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. The average patient age in these cases is 55 years, and the disease is as common in males as it is in females.…”