Dermatology utilizes specialized equipment to diagnose and treat skin problems. Some available procedures include skin biopsies, cryosurgery, topical chemotherapy, photodynamic therapy, Mohs micrographic surgery, and electrodessication-curettage. Common skin disorders include psoriasis, eczema, acne, rosacea, ichthyosis, vitiligo, hives, and seborrheic dermatitis.