Lobular carcinoma in situ (LCIS) is a condition where large numbers of abnormal cells grow in the lobules of the breast (to see the anatomy of the breast, click here). LCIS does not itself turn into breast cancer, except in rare instances. However, the condition does increase the risk of breast cancer. Compared to women without LCIS, those with the condition are 7 to 10 times more likely to develop cancer in either breast [26]. Invasive ductal cancer is the most common type of cancer to develop in women with LCIS [27].
For more on different tumor types, see the Diagnosis section.
For more on diagnosing LCIS, see the Diagnosis section.
Updated 09/14/09
