title: Firm nodule in the perianal region of a 59-year-old woman.
authors.affiliation: Clinic of Dermatology, Heidelberg University, Germany. maria_zywica@yahoo.de
authors.forename: Maria
authors.initials: M
authors.lastname: Zywica
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Hartschuh
authors.forename: Corinna
authors.initials: C
authors.lastname: Hamsch
mesh_terms: D018250:Acrospiroma / Q000473:pathology*; D001003:Anal Canal / Q000473:pathology*; D001005:Anus Neoplasms / Q000473:pathology*; D046169:Dermoscopy / Q000379:methods*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged