Nikolas
Created page with "<section begin="dermatology" /> * Second most common skin cancer * Risk factors ** Chronic sun exposure ** Precancerous lesions *** Actinic keratosis *** Bowen disease (SCC in situ) *** Leukoplakia ** Radiation ** Chronic scars, ulcers ** Arsenic, tar * Clinical features ** Painless, non-healing, bleeding ulcer or nodule ** Rapid growing ** On sun-exposed areas *** Face and neck *** Lower lip * Prognosis ** 5% risk of metastasis * Diagnosis ** Punch biopsy * Treatment **..."