Malignant Breast Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A primary or metastatic malignant neoplasm involving the breast. The vast majority of cases are carcinomas arising from the breast parenchyma or the nipple. Malignant breast neoplasms occur more frequently in females than in males.

**Synonyms:** - Malignant Breast Tumor - Malignant Neoplasm of Breast - Malignant Neoplasm of the Breast - Malignant Tumor of Breast - Malignant Tumor of the Breast