NCIt synonyms : Paget's Disease of the Anus; Paget's Disease of Anus; Anal Paget's Disease; Anal Paget s Disease; Paget Disease of the Anus;
NCIt definition : A slowly spreading, erythematous eczematoid plaque in the anal region. Histologically,
the basal part or whole thickness of the squamous epithelium is infiltrated by large
cells with abundant pale cytoplasm and large nuclei. Half of the cases are associated
with an internal malignancy, most often a colorectal adenocarcinoma. The other half
of the cases, have a high local recurrence rate and they may become invasive (WHO).;