Invasive Breast Lobular Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** An infiltrating lobular adenocarcinoma of the breast. The malignant cells lack cohesion and are arranged individually or in a linear manner (Indian files), or as narrow trabeculae within the stroma. The malignant cells are usually smaller than those of ductal carcinoma, are less pleomorphic, and have fewer mitotic figures.

**Synonyms:** - Classic Invasive Lobular Carcinoma - Infiltrating Lobular Adenocarcinoma - Infiltrating Lobular Breast Carcinoma - Infiltrating Lobular Carcinoma of Breast - Infiltrating Lobular Carcinoma of the Breast - Invasive Lobular Adenocarcinoma - Invasive Lobular Breast Carcinoma - Invasive Lobular Breast Carcinoma - Invasive Lobular Breast Carcinoma - Invasive Lobular Carcinoma - Invasive Lobular Carcinoma of Breast - Invasive Lobular Carcinoma of the Breast - Invasive Lobular Carcinoma, Classic Type - Invasive lobular carcinoma