Colposcopy in anorectal disease.

If used properly, colposcopy will increase the scope of anorectal examination. It will allow for more precise diagnosis and early diagnosis of rectal, anal and perianal neoplasis during dysplastic phase. It is accepted today that, in its natural course, neoplastic lesions progress from dysplasia through intraepithelial neoplasia to invasive cancer as an interrelated function of time and immunologic status. If dysplasia and intraepithelial neoplasia is present for ten years prior to invasion, as has been suggested, the use of colposcopy in the younger aged patients could help reduce the incidence of invasive disease later.