Basket Study of Tucatinib and Trastuzumab in Solid Tumors With HER2 Alterations

There are multiple cohorts in this trial: * 5 tumor specific cohorts with HER2 overexpression/amplification (cervical cancer, uterine cancer, biliary tract cancer, urothelial cancer, and non-squamous non-small cell lung cancer \[NSCLC\]) * 2 tumor specific cohorts with HER2 mutations (non-squamous NSCLC and breast cancer) * 2 cohorts which will enroll all other HER2 amplified/overexpressed solid tumor types (except breast cancer, gastric or gastroesophageal junction adenocarcinoma \[GEC\], and colorectal cancer \[CRC\]) or HER2-mutated solid tumor types.