A diagnosis of carcinoma in situ or invasive squamous cell carcinoma will be considered positive for malignancy. If a diagnosis of malignancy is made after the initial endoscopy, regardless of which test was positive, the patient will be contacted immediately so that appropriate treatment can be pursued. For diagnoses of dysplasia and other non-malignant conditions such as polyp, lymphoid tissue, papilloma, etc., the patient will be scheduled for follow-up.