Advanced HER2-Ultralow Breast Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** A HER2-ultralow breast adenocarcinoma that has spread extensively to other anatomic sites or is no longer responding to treatment.

**Synonyms:** - Advanced HER2-Ultra Low Breast Adenocarcinoma - Advanced HER2-Ultra Low Breast Carcinoma - Advanced HER2-Ultra-Low Breast Adenocarcinoma - Advanced HER2-Ultra-Low Breast Carcinoma - Advanced HER2-Ultralow Breast Adenocarcinoma