Moreover, DPP4/CD26 is detectable on many types of cancer cells; examples include thyroid carcinoma, gastrointestinal stromal tumor, prostate carcinoma, lung carcinoma, hepatic cancer, colon carcinoma, renal cell cancer (RCC), and malignant pleural mesothelioma (MPM). Here, DPP4 is linked to gastrointestinal stromal tumor.