PMC4900059_01
PMC4900059_02
PMC4900059_03
57-year-old female with struma ovarii. Scintigraphic images ten days after the administration of 104.8 mCi I-131 sodium iodide demonstrate (upper) a solitary focus of intensely increased radiotracer accumulation within the midline pelvis () and (lower) two small foci of radionuclide accumulation in the region of the thyroid bed () with an additional third focus of mildly increased uptake present in the region of the nasopharynx/maxilla, likely representing a mucous retention cyst (). The intense focus located in the midline pelvis (), resembling a six pointed star, is referred to as "star artifact" and occurs when a high-energy radionuclide is concentrated within a small volume. ("<< SSN" and "<< XIPHOID" in the "ANT NECK W/MARK" and "ANT CHEST W/MARK" panes represent markers placed at the patient's suprasternal notch and xiphoid process, respectively, and are used for anatomical orientation.)
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fig1
I-131 sodium iodide, by mouth, two days later. In addition to residual iodine-avid tissue in the thyroid bed, postablation scans the following week revealed that within the midline pelvis, there was a solitary focus of intensely increased radiotracer accumulation with no other abnormal focal accumulations (Fig. 1).
57-year-old female with struma ovarii. Sagittal (upper) and transverse (lower) sonographic images of the right adenexa demonstrate a large, mixed-solid and cystic mass measuring 5.9 x 4.4 x 5.7 cm corresponding to the location of the increased radiotracer accumulation on the comparison nuclear medicine study. ("POST MEN 1999" refers to the patient becoming postmenopausal in 1999. "NO HTR" clarifies that the patient is not currently taking hormonal replacement therapy at the time of the study.)
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A right ovarian mass with mixed solid and cystic components was discovered by US in the corresponding vicinity of increased radiotracer uptake (Fig. 2).
PMC4900059_04
57-year-old female with struma ovarii. Prepared slides from the resected ovarian mass show thyroid follicles lined by a single layer of epithelium containing amorphous colloid material.
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fig3
Microscopic examination confirmed a mature teratoma with predominant benign thyroid component consistent with struma ovarii (Fig. 3).