Abstract
The patient was 60-year-old female who had had painless tumor in the right anterior neck for about 20 years. Malignant tumor of the thyroid gland was highly suspected on the basis of the clinical findings and results of laboratory examinations: 123I-thyroid scintigraphy, 201Tl-thyroid scintigraphy and cervical CT scan. Histopathological examination of the tumor removed by surgery revealed that it consisted of two parts: the posterior one a non-functioning parathyroid carcinoma and the anterior one a follicular adenoma of the thyroid. The literature on parathyroid carcinoma is reviewed, and the possible etiology of the combined tumor is discussed.
