A rare case of hidradenoma papilliferum: Report of a case and review of the literature

Giant ectopic hidradenoma papilliferum on the scalp

“…Extragenital localization is very rare and has been found on the scalp, 3 eyelid, 4,5 nipple, 6 external ear canal, 7 axilla, 1 back, 1,8 chest, 9 extremities 10,11 and postauricular area 12 . Vang et al.…”

“…Extragenital localization is very rare and has been found on the scalp, 3 eyelid, 4,5 nipple, 6 external ear canal, 7 axilla, 1 back, 1,8 chest, 9 extremities 10,11 and postauricular area. 12 Vang et al 10 reported nonanogenital HP occurring in the arm, along with a review of the published work, and called it ''ectopic HP''. Upon review of 16 patients with ectopic HP, they described that in contrast to anogenital HP, nearly one half of the patients with ectopic HP were men.…”