Butcher's wart
Encyclopedia
Butcher's wart is a cutaneous condition caused by a small group of viruses that infect the skin.

An association with human papillomavirus
Human papillomavirus
Human papillomavirus is a member of the papillomavirus family of viruses that is capable of infecting humans. Like all papillomaviruses, HPVs establish productive infections only in keratinocytes of the skin or mucous membranes...

7 has been suggested.
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