NCIt definition : A papillary neoplasm that arises endobronchially. It is characterized by the presence
of a delicate fibrovascular core lined by stratified squamous epithelium. Squamous
cell papillomas can be solitary or multiple. Patients usually present with signs and
symptoms of bronchial obstruction. Because of the possibility of recurrence and reported
cases of squamous cell carcinomas arising at the excision site of squamous cell papillomas,
complete excision is indicated.;