How can very small cancer tumours be found in the body?

Cant find: Tumors that are small are essentially primary lesions that have not spread. Under most circumstances they are asymptomatic and unrecognized. In the abdomen, a small polypoid carcinoma of the colon, a small ovarian lesion , a small kidney lesion or adrenal tumor unless functional by producing hormone, will not be detected unless routine screening is employed to look for problems.