A benign or malignant neoplasm of the breast parenchyma. It can originate from the ducts, lobules or the breast adipose tissue. Breast neoplasms are much more common in females than males. The disease is MONDO_0021100 (breast neoplasm). Also known as: breast neoplasm (disease), breast tumor, breast tumour, neoplasm of breast, neoplasm of the breast, neoplasm, breast, tumor of breast, tumor of the breast.