of the eyeball). Meniscectomy surgical removal of all or part of a torn meniscus, which common knee joint injury. Partial meniscectomy is preferred by surgeons over total meniscectomy. Myectomy is the removal of a portion of muscle. Myomectomy is the removal of fibroids from the uterus, but the uterus is left intact. N Necrosectomy is the removal of dead tissue. Nephrectomy is the removal of a kidney. Neurectomy is the removal of a nerve. O Oophorectomy is the surgical removal of the ovaries, also called spaying. Orchiectomy is the surgical removal of the testicles, also called orchidectomy, castration, or neutering. Ostectomy is the surgical removal of bone. P Pancreatectomy is the removal of part or all of the pancreas. If the whole of the pancreas is removed, the person will become diabetic. Pancreaticoduodenectomy is the surgical removal involving the pancreas and the duodenum. Panniculectomy is the removal of a panniculus, which is a dense layer of fatty tissue growth consisting of subcutaneous fat in the lower abdominal area. Parathyroidectomy is the surgical removal of one or more of the parathyroid glands. Penectomy is the partial or complete removal of the penis. Also known as a pendectomy. Pericardiectomy is the partial or complete removal of the pericardial sac around the heart. Pharyngectomy is the removal of the pharynx (also called the throat). Pharyngolaryngoesophagectomy is the surgical removal of the pharynx, larynx and esophagus, usually as a result of cancer of the hypopharynx. Photorefractive keratectomy is the alteration of the cornea by means of a laser. Pinealectomy is the surgical removal of the pineal gland, used often on birds to study circadian rhythms. Pneumonectomy is the surgical removal of a lung. Posthectomy, more commonly known as circumcision, is the surgical removal of the foreskin of the penis. This is also known as a prepucectomy, as the medical term for the foreskin is the prepuce. Proctocolectomy is the removal of the colon or the large intestine and the rectum. Prostatectomy is the removal of the prostate gland. This may be either all of the gland, which is known as a radical prostatectomy, or just a part of the prostate, which is called a transurethral resection of the prostate. Pulpectomy is the removal of all the material in the pulp chamber and root canal of a tooth. Q Quadrantectomy is a surgical procedure in which quadrant (approximately one-fourth) of the breast, including tissue surrounding