Further RT-PCR and Western blot experiments confirmed that PTPRCAP was expressed at a lower level in triple-negative breast cancer cell lines, providing experimental support for its role in breast cancer.In the field of lung adenocarcinoma, researchers such as GILLETTE [15] conducted a comprehensive proteogenomic study on a prospectively collected cohort of lung adenocarcinoma cases. Here, PTPRCAP is linked to lung adenocarcinoma.