Monarch Disease Ontology identifier MONDO_0002671 (signet ring cell breast carcinoma) is an invasive breast adenocarcinoma characterized by the presence of malignant epithelial cells with signet ring appearance. Also known as: SRC breast carcinoma, SRC carcinoma of breast, SRC carcinoma of the breast, breast signet ring cell carcinoma, mammary signet Ring cell carcinoma, primary SRC breast carcinoma, primary SRC carcinoma of breast, primary SRC carcinoma of the breast.