Abstract
Adenomatous goiter and follicular tumor can be differentially diagnosed by ultrasonography and cytology, but the diagnosis can be difficult because of the great histopathologic similarities. The patient was a 51-year-old male. A slowly increasing tumor was found in both lobes of the thyroid gland, and a total thyroidectomy was performed. Pathological examination revealed multiple follicular tumors in the glands, and a final diagnosis of multiple adenomatous goiter with mixed follicular tumors was made. The opinions of several pathologists differed in their interpretations of the diagnosis, depending on which of the findings they considered most important. Since cases of follicular carcinoma with no local recurrence or distant metastasis for more than 10 years have often been reported, careful follow-up is necessary.
