While the Nigro/Wayne state regimen consisting of Mito C & 5FU is well stablished for squamous cell carcinoma of the anus/perianal tissue, are there any data for the management of patient with squamous cell carcinoma in situ of the anus/perianal tissue? Is the Mito C/5FU regimen applicable in a patient with squamous cell carcinoma in situ of the anus?