Squamous Cell Carcinoma

• Adults, usually >55 years

• M>F

• 12/100,000 white males; 7/100,000 white females

• Risk factors: UV exposure, HPV (16, 18, 31, 33, 35), arsenic, tar, chronic heat (erythema ab igne), chronic radiation dermatitis, chronic ulcers, burn scars, discoid LE, immunosuppression

• Most common in sun-exposed areas