NCIt definition : A benign epithelial neoplasm characterized by a papillary growth pattern and a proliferation
of neoplastic squamous cells without morphologic evidence of malignancy. Most frequently
it arises in the oral cavity, nasopharynx, larynx, esophagus, vagina, and vulva.;
Alternative definition : CDISC: A benign epithelial neoplasm characterized by a papillary growth pattern and
a proliferation of neoplastic squamous cells.;