Case of anal adenocarcinoma in situ with pagetoid spread but without macroscopic abnormality in anal mucosa. Issue 9 (26th September 2016) - Shimizu, Takae; Inozume, Takashi; Takaki, Machiko; Ohnuma, Takehiro; Sano, Shinya; Kawamura, Tatsuyoshi; Shimada, Shinji