School ager with anti-NMDA encephalitis Sagittal US of the pelvis (upper left) shows the right ovary to be enlarged and to contain an echogenic lesion within it superiorly. Axial (upper right) and coronal (lower left) and sagittal (lower right) CT with contrast of the abdomen shows an enlarged right ovary in the midline of the pelvis anterior to the rectum which has multiple low density lesions within it. The diagnosis was ovarian teratoma.