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A precancerous lesion consists of atypical cells and is associated with an increased risk of cancer. Precancerous lesions should usually be removed or regularly followed up for progression.
Specific precancerous states
For precancerous states of the GI tract, see topic 60 of internal medicine.
For ductal and lobular carcinoma in situ, see topic B7. Resectable mammary cancer. Surgical and adjuvant treatment.