NCIt definition : A carcinoma arising from squamous bronchial epithelial cells. It may be keratinizing
or non-keratinizing. Keratinizing squamous cell carcinoma is characterized by the
presence of keratinization, pearl formation, and/or intercellular bridges. Non-keratinizing
squamous cell carcinoma is characterized by the absence of keratinization, pearl formation,
and intercellular bridges. Cigarette smoking and arsenic exposure are strongly associated
with squamous cell lung carcinoma.;