The branch of medicine that treats conditions, diseases, deformities, and injury using instruments and operative procedures. Also, the surgical treatment or procedure itself. Generally, the place for major surgery is in a hospital, but minor surgery commonly is performed in a doctor's or dentist's office. Minor surgery may include removal of a sebaceous cyst, wart, or foreign object. Other minor surgeries include circumcision, vasectomy, skin biopsy, dilation and curettage.