How is lcis typically diagnosed?

Biopsy. Patients with lobular carcinoma in situ (lcis) typically do not have any symptoms and the abnormality cannot usually be seen on mammograms. It is usually diagnosed when a breast biopsy is performed for other reasons, such as an unrelated breast lump. The examination of the tissue by a pathologist under a microscope shows the abnormal cells found in lcis.
Xray. Lcis is a mammographic finding consistent with a pattern of clustered microcalcifications..Dianosis is made with a microscopic study of the breast tissue taken from this xray finding.