title: Perianal squamous cell carcinoma in-situ: a report of two human papilloma virus-negative cases.
abstract: We are reporting two cases of perianal squamous cell carcinoma in-situ, negative for high-risk (HR) and low-risk (LR) human papilloma viruses. A brief review of anal and perianal squamous cell carcinoma and the role of HPV are presented.
authors: Department of Pathology, Creighton University Medical Center, Omaha, NE, 68131, USA. debasarma@creighton.edu.
authors: James
authors: J
authors: Shehan
authors: Jeff F
authors: JF
authors: Wang
authors: Susan
authors: S
authors: Repertinger
authors: Deba P
authors: DP
authors: Sarma