Breast Ductal Carcinoma In Situ

**Semantic type:** Neoplastic Process

**Definition:** A breast 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.

**Synonyms:** - Breast Ductal Carcinoma In Situ, NOS - DCIS - DCIS - DCIS, NOS - DCIS, NOS - Ductal Breast Carcinoma In Situ - Ductal Breast Carcinoma In Situ - Ductal Breast Carcinoma In Situ - Ductal Carcinoma In Situ - Ductal Carcinoma In Situ (DCIS) - Ductal Carcinoma In Situ of Breast - Ductal Carcinoma In Situ of the Breast - Ductal carcinoma in situ - Intraductal Breast Carcinoma - Intraductal Carcinoma - Intraductal Carcinoma of Breast - Intraductal Carcinoma of the Breast - Intraductal carcinoma in situ of breast - Intraductal carcinoma in situ of unspecified breast - Non-Infiltrating Ductal Adenocarcinoma of Breast - Non-Infiltrating Ductal Adenocarcinoma of the Breast - Non-Infiltrating Ductal Breast Adenocarcinoma - Non-Infiltrating Ductal Breast Carcinoma - Non-Infiltrating Ductal Carcinoma of Breast - Non-Infiltrating Ductal Carcinoma of the Breast - Non-Infiltrating Intraductal Adenocarcinoma - Non-Infiltrating Intraductal Adenocarcinoma of Breast - Non-Infiltrating Intraductal Adenocarcinoma of the Breast - Non-Infiltrating Intraductal Breast Adenocarcinoma - Non-Infiltrating Intraductal Carcinoma - Non-Invasive Ductal Adenocarcinoma of Breast - Non-Invasive Ductal Adenocarcinoma of the Breast - Non-Invasive Ductal Breast Adenocarcinoma - Non-Invasive Ductal Breast Carcinoma - Non-Invasive Ductal Carcinoma of Breast - Non-Invasive Ductal Carcinoma of the Breast - Non-Invasive Intraductal Adenocarcinoma of Breast - Non-Invasive Intraductal Adenocarcinoma of the Breast - Non-Invasive Intraductal Breast Adenocarcinoma - ductal carcinoma in situ - intraductal carcinoma