Detection of Human Papillomavirus Type 39 in a Seborrheic Inclusion Cyst of the Buttock

To the best of our knowledge, only eight cases of SIC have been reported thus far in the English litera- ture.1-3 Microscopically, SICs exhibit features that are suggestive of viral infection.4 Therefore, an association between SICs and human papillomavirus (HPV) has been suspected, but it has only been demonstrated in one previous report by Terada,1 which identified an HPV-positive SIC through immunohistochemical staining for HPV antigens. [...]the pre-existing wart undergoes regression, leaving only the dermal cyst behind. Since the buttock, which was the location in our case, can also be con- sidered a weight-bearing area, this theory could explain the pa- thogenesis of the cyst described in the present case.