I-123 UPTAKE IN NONFUNCTIONAL STRUMA OVARII

A case of nonfunctional struma ovarii preoperatively diagnosed by scin tigraphy of the pelvis using I-123 NaI is reported. US, CT, and MRI re vealed a multilobulated mass composed of cystic and solid components. CT showed cystic components with slightly high density and MRI showed various signal intensities on T1- and T2-weighted images. I-123-scinti graphy of the pelvis showed uptake in the pelvic mass. Microscopic exa mination revealed the histologic appearance of thyroid tissue accompan ied by follicular adenoma. I-123 scintigraphy of the pelvis was useful for reaching the correct preoperative diagnosis in this patient with nonfunctional struma ovarii.