Alva Review-Courier -

COLUMBIA, Mo. (AP) — When he was 44, Marc Wright had the biannual physical required by the city for Columbia firefighters. He'd just returned from a vacation where he'd completed a three-hour volcano hike and felt great — in good shape for his age.

Wright's other, routine physicals in the past several decades with the Columbia Fire Department had come back fine — normal. So he was surprised when the results this time looked different. His hemoglobin was low, and he'd recently been diagnosed with anemia.

The physician suggested Wright get a colonoscopy. He scheduled a procedure not many 40-year...