MBBS (Hons), MMed (ClinEpi), FACD, Consultant Dermatologist, Department of Dermatology, Liverpool Hospital, Liverpool, NSW; Ingham Institute of Applied Medical Sciences, Liverpool, NSW; University of NSW, Sydney, NSW
A woman aged 49 years presented with a 12-month history of an enlarging painless but pruritic perianal plaque 2 cm from the anal verge.