Case 180. HPV-3 infection (verruca plana) (18 y-o M)

　 　 　 　
　
Biopsy from multiple, mildly pigmented flat elevasions on the perioral skin
 　
　 　 　 　

　

 　 Histologically, the koilocytic keratinocytes contain nuclear inclusions and "basket weave" appearance is seen in the cornified layer (HE).