title: Grade 4 radiation dermatitis presenting with full-thickness ulcerations of the groin after radiation therapy for anal squamous cell carcinoma (SCC): An example of the "bolus effect" of radiation therapy.
authors.affiliation: Department of Dermatology, Columbia University, New York, New York.
authors.forename: Paul
authors.initials: P
authors.lastname: Blackcloud
authors.affiliation: Department of Dermatology, Columbia University, New York, New York.
authors.forename: Ellen
authors.initials: E
authors.lastname: Dabela
authors.affiliation: Department of Dermatology, Columbia University, New York, New York.
authors.forename: Marc E
authors.initials: ME
authors.lastname: Grossman
keywords: anal cancer; bolus effect; grade 4; radiation dermatitis; squamous cell carcinoma