Merkel cell polyomavirus is a passenger virus in both poroma and porocarcinoma.
Anna-Stiina MeriläinenHarri Jaakko SihtoVirve S K KoljonenPublished in: Journal of cutaneous pathology (2021)
The low number of viral DNA copies in poroma and porocarcinoma samples, together with the negative LT expression of MCPyV DNA-positive tumors, indicates that MCPyV is simply a passenger virus rather than an oncogenic driver of porocarcinoma.