The patient is thirty six years old female who admits to the hospital with severe leftgonalgia and disturbance in gait. She complains also of polydipsia and polyuria. A cherrysizedtumor is palpated in her neck region. She is suspiciously diagnosed as primary hyperparathyroidismby means of various examinations. The radiographs of her whole skeletonreveal a severe decalcification, especially showing mottling pattern of the cranium and thesubperiosteal resorption of middle phalanges and cyst-like formation in the shaft of right femur.The complete dental X-ray films indicate a severe decalcification of the alveolar bone and themissing of lamina dura. The tumor is removed including left lobe of the thyroid gland andthe left neck dissection is performed. The removed material is interpretted as parathyroidcarcinoma by means of the pathological examination. Four and one-half months after theoperation the laminadura reappear in some parts of the alveolar bone.
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