Regarding the histopathological characteristics of sebaceous tumors, it has been shown that the number of TILs was increased in dMMR sebaceous neoplasms compared to pMMR sebaceous neoplasms (16.5 vs. 9.7, p = 0.027) but with overlaps between both lesions that prevent using TILs as an indicator of the MMR status [93]. The gene discussed is MRC1; the disease is sebaceous gland neoplasm.