The correct answer is Endometrioma Clinical presentations of endometriosis often consist of chronic pelvic pain and infertility; however, many patients are asymptomatic. The earliest visible manifestations of endometriosis are whitish peritoneal plaques. The foci of endometrial tissue are small subserosal nodules with a brown appearance on gross examination; termed powder burns, they are seen on laparoscopic examination. Over time, the repeated hemorrhaging can produce extensive fibrosis surrounding the endometrial tissue, which can result in adhesions to adnexal structures or to bowel and can obliterate the pelvic cul-de-sac.