Non-melanomatous Skin Cancer

Eflornithine to Prevent Skin Cancer in Patients With Previously Treated Early Stage Skin Cancer

Photodynamic Therapy Using Silicon Phthalocyanine 4 in Treating Patients With Actinic Keratosis, Bowen's Disease, Skin Cancer, or Stage I or Stage II Mycosis Fungoides

Eflornithine With or Without Triamcinolone in Preventing Nonmelanoma Skin Cancer in Patients With Actinic Keratosis

Green Tea Extract in Treating Patients With Actinic Keratosis

Topical Aminolevulinic Acid in Patients With Nonmelanoma Skin Cancer

Topical Sirolimus in Patients With Basal Cell Nevus Syndrome and in Healthy Participants

Acitretin in Preventing Skin Cancers in Patients With Previously Treated Skin Cancers Who Have Undergone Organ Transplantation

Studying a Tumor Marker for Testicular Cancer, Skin Cancer, Small Intestine Cancer, and Pancreatic Cancer

Effect of Solar-Simulated Ultraviolet Radiation on Gene Expression in Unprotected and Sunscreen-Protected Skin of Healthy Adults With Fitzpatrick Skin Type II

Photodynamic Therapy Using Aminolevulinic Acid in Treating Patients With Skin Cancer

Gefitinib and PEG-Interferon Alfa-2a in Treating Patients With Unresectable or Metastatic Skin Cancer

Bioelectric Field Imaging in Diagnosing Melanoma and Other Skin Cancers in Patients With Skin Lesions

Computer-Based Continuing Education for Doctors in Examination and Counseling of Patients on Skin Cancer or Weight Control

Photodynamic Therapy in Treating Patients With Skin Cancer

Topical Imiquimod Compared With Surgery in Treating Patients With Basal Cell Skin Cancer

Celecoxib in Preventing Basal Cell Carcinoma in Patients With Basal Cell Nevus Syndrome

Radiation Therapy in Treating Patients With Head and Neck Cancer

Isotretinoin in Preventing Skin Cancer

Imiquimod Cream in Treating Patients With Basal Cell Skin Cancer

Celecoxib in Preventing Skin Cancer