Mucin-16, known as ovarian tumor marker CA125 due to its overexpression in ovarian and endometrial cancer [9], is present in a number of normal tissues, but mainly ocular surface epithelia such as the cornea, conjunctiva, lacrimal gland, accessory lacrimal glands, efferent tear ducts and also nose, uvula and larynx [10]. The gene discussed is MUC16; the disease is endometrial cancer.