Molecular genetic studies have demonstrated that MED12 gene mutations can lead to inherited diseases, with some patients presenting phenotypes such as vascular structural abnormalities (such as aneurysms [35]), while somatic MED12 mutations result in abnormal proliferative phenotypes, such as uterine leiomyoma [36] and fibroadenoma [37]. The gene discussed is MED12; the disease is Fibroadenoma.