Bowen's disease is:

This is an SCC , of which 3-11% progress to SCC Etiological agents : Chronic solar damage , inorganic arsenic & HPV 16 This is rare, slow-growing intraepidermal SCC that often mimics a chronic dermatosis CLINICAL FEATURES It usually presents with pruritus & on examination looks like psoriasis or senile keratosis. Presents as a slowly enlarging , erythematous , scaly patch or plaque