Pediatric Ovarian Dysgerminoma Etiology: germ cell tumor of ovaryClinical: LDH is tumor marker, most common germ cell tumor of ovary (second most common is yolk sac tumor), adolescent -> young adults Radiology Cases of Ovarian Dysgerminoma Transverse and sagittal US of the pelvis (above) shows an echogenic and inhomgenous solid mass superior to the bladder. Neither ovary could be visualized. Axial CT with contrast of the abdomen shows a solid non-enhancing midline mass. The mass was found to be tossed in the operating room. Surgery Cases of Ovarian Dysgerminoma Surgical image (above) shows a mass arising from the left ovary. Surgical image (below) shows the left adnexal pedicle to be twisted in the center of the image. The mass and the left ovary and the fallopian tube were found to be torsed.