NCIt synonyms : Infundibuloisthmicoma; Acanthoma of Pilar Sheath; Acanthoma of the Pilar Sheath; Infundibular Adenoma;
NCIt definition : A benign, small, papular or nodular skin neoplasm that usually arises above the upper
lip. It is characterized by an epithelial proliferation with a central cavity. The
cavity wall is lined with keratinocytes.;