PT - JOURNAL ARTICLE AU - Ju Yong Cheong AU - Cheok Soon Lee AU - Christopher John Young TI - Hidradenoma papilliferum: an unusual benign perianal tumour AID - 10.1136/bcr-2017-220354 DP - 2018 Jul 27 TA - BMJ Case Reports PG - bcr-2017-220354 VI - 2018 4099 - http://casereports.bmj.com/content/2018/bcr-2017-220354.short 4100 - http://casereports.bmj.com/content/2018/bcr-2017-220354.full AB - Hidradenoma papilliferum is an uncommon benign tumour that is located in the anogenital region of middle-aged women. They are usually only diagnosed after excision and are thought to arise from anogenital mammary-like glands. We present the case of a young woman who noticed a slow growing perianal lump which caused minimal symptoms.