PTPRT and small cell lung carcinoma: We further analyzed the mutations of PTPRT in 10,000 metastatic cancers published by MSK-impact in 201728.It was found that PTPRT has a considerable mutation frequency in many metastatic cancers, such as melanoma, small cell lung cancer, head and neck carcinoma, suggesting that PTPRT may be involved in multiple cancers (Fig. 2C).