Back then, endometriosis was not well known. The understanding of every disease must begin somewhere, and we had barely cast a light on this one. In fact, it was not until the late 1980s that a more specific definition and diagnoses of the early stages of the disease began to surface. Dr. David Redwine and Dr. Dan Martin,who were practicing from Oregon and Tennessee, respectively, defined early endometriotic lesions as being differently colored than normal, healthy tissue. Today, it is known that endometriosis lesions are varied in color, appearing as black, brown, red, blue, white, and even clear. At the time, however, the truth behind this disease concerning women's pelvic pain was only beginning to become more apparent.