Colorectal Cancer Alliance staff and volunteers set up a giant inflatable colon at the St. Louis Undy RunWalk on March 23, as part of the Big Colon Tour supported by Olympus. (Photo credit: Marta Payne)
Colorectal Cancer Alliance staff and volunteers set up a giant inflatable colon at the St. Louis Undy RunWalk on March 23, as part of the Big Colon Tour supported by Olympus. (Photo credit: Marta Payne)