Defined as the detection of asymptomatic cancers, often through screening efforts, which are either non-growing or so slow growing that they would never cause medical problems for the patient in the patient’s lifespan.
Estimated curtain 10-20% of radiologically detected lung cancers, Up to 50% of mammographically detected breast Cancers, and 40-60% of prostate cancers.
DCIS by some as an over diagnosis of cancer.