D05.1

Clinical Information

• duk-tal kar-sin-o-ma in sye-too) dcis. Abnormal cells that involve only the lining of a duct. The cells have not spread outside the duct to other tissues in the breast. Also called intraductal carcinoma.

• A carcinoma entirely confined to the mammary ducts. It is also known as dcis. There is no evidence of invasion of the basement membrane. Currently, it is classified into three categories: high-grade dcis, intermediate-grade dcis and low-grade dcis. In this classification the dcis grade is defined by a combination of nuclear grade, architectural growth pattern and presence of necrosis. The size of the lesion as well as the grade and the clearance margins play a major role in dictating the most appropriate therapy for dcis.

• A noninvasive noninfiltrating) carcinoma of the breast characterized by a proliferation of malignant epithelial cells confined to the mammary ducts or lobules, without light-microscopy evidence of invasion through the basement membrane into the surrounding stroma.

• A noninvasive condition in which abnormal cells are found in the lining of a breast duct. The abnormal cells have not spread outside the duct to other tissues in the breast. In some cases, ductal carcinoma in situ may become invasive cancer and spread to other tissues, although it is not known at this time how to predict which lesions will become invasive.

Details

• D05.1 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.

• The 2023 edition of ICD-10-CM D05.1 became effective on October 1, 2022.

• This is the American ICD-10-CM version of D05.1 – other international versions of ICD-10 D05.1 may differ.