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  Ductal carcinoma in situ, or DCIS, makes up 25% of breast cancers and is lethal in only 1-2%. Failure to differentiate leads to massive overtreatment, significant emotional and physical disability, and unnecessary treatment and costs. There is a desperate need for better screening tests. Many of these cancers spontaneously disappear.            

Between 30 and 50% of new breast cancer diagnoses are found on mammography screenings and are classified as ductal carcinoma in situ, or DCIS. Most of these "cancers" are not cancer at all. In fact about 97% are benign lesions that can be followed over time quite safely. Most cases of DCIS would be better off under-diagnosed and under-treated. Unfortunately,...