title: Basal cell carcinoma presenting as a perianal ulcer and treated with radiotherapy.
authors.affiliation: Department of Dermatology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Hyun Soo
authors.initials: HS
authors.lastname: Lee
authors.affiliation: Department of Dermatology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Sue Kyung
authors.initials: SK
authors.lastname: Kim
references.citation: J Am Acad Dermatol. 2001 Jul;45(1):68-71
references.pmid: 11423837
references.citation: Australas J Dermatol. 2003 Aug;44(3):159-66; quiz 167-8
references.pmid: 12869039
references.citation: J Am Acad Dermatol. 2013 Feb;68(2):189.e1-21; quiz 210
references.pmid: 23317980
references.citation: J Dermatol Surg Oncol. 1989 Apr;15(4):424-31
references.pmid: 2925988