Is lobular carcinoma in situ a form of cancer

Is lobular carcinoma in situ a form of cancer? What is the significance of LCIS?

LCIS has no clinical or mammographic correlate. It is a histologic diagnosis. LCIS is not a cancer or a premalignant lesion but is a marker that identifies women who may be at increased risk for developing breast cancer. In a patient previously diagnosed with LCIS, the risk of developing breast cancer in either breast is about 33%.

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