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Lobular carcinoma in situ (LCIS) is not cancer. It is just a signal of increased risk of developing breast cancer. Lobular carcinoma lesions usually do not grow to become breast cancer; in fact the risk of breast cancer development is increased not only on the same breast but also in the opposite breast. Because of this reason if someone is diagnosed with lobular carcinoma in situ (LCIS), the treatment option is biopsy followed by close follow up of both breasts. Other option is to do a
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bilateral mastectomy because of the increased risk of breast cancer in both the breasts. Patients with lobular carcinoma in situ may also consider the option of enrolling in one of the cancer chemoprevention trials. Bilateral total mastectomy may be indicated in patients who have other risk factors for breast cancer in addition to the lobular carcinoma in situ. Bilateral mastectomy is usually followed by immediate breast reconstruction.
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