Endometrial hyperplasia can be diagnosed using several tests. Since the overgrowth of the endometrium is usually quite pronounced, sometimes folding back on itself or growing in frond-like patterns, visual means of diagnosis are often sufficient. An ultrasound uses sound waves to create an image of the uterus, and a hysteroscopy involves the insertion of a small tube with a camera on it into the uterus. Doctors may also want to take a tissue sample (biopsy), of the endometrium or perform a procedure called a D & C (dilation and curettage) to loosen and remove a sample of the uterine lining.Treatment for endometrial hyperplasia usually involves taking a form of the hormone progesterone. In rare cases, this treatment will not be sufficient, and different medications or surgery will be necessary to correct the overgrowth of tissue.