Histologic changes of measles in human skin and oral mucosa are characteristic. The most specific finding is syncytial-type multinucleate epithelial cells, similar in appearance to those seen in measles infected tissue cultured cells.
Ackerman AB, Suringa DWR. Multinucleate Epidermal Cells in MeaslesA Histologic Study. Arch Dermatol. 1971;103(2):180-184. doi:10.1001/archderm.1971.04000140066011