Parathyroid carcinoma is a rare cause of primary hyperparathyroidism and occurs in one percent of cases. Most of the patients at the time of diagnosis are young and the mean age is 40 year-old and occur with equal frequency in both sexes. In most series, serum calcium levels are ≽ 14 mg/dl and in half of them, a palpable cervical mass is evident. Clinical manifestations are maily due to hyperca...

Background. Parathyroid carcinoma is a rare entity, comprising fewer than 1%of cases of hyperparathyroidism. The disease generally presents with severe hyperparathyroidism and occasionally with vocal cord paralysis or a firm palpable cervical mass. Methods. The classic histopathologic features of trabecular pattern, mitotic figures, thick fibrous bands, and capsular and vascular invasion are no...

Parathyroid hormonelike protein from human renal carcinoma cells. Structural and functional homology with parathyroid hormone. Identification of a novel 17,000-Dalton parathyroid hormone-like adenylate cyclase-stimulating protein from a tumor associated with humoral hypercal-cemia of malignancy. Synthetic human parathyroid hormone-like protein stimulates bone resorp-tion and causes hypercalcemi...

Parathyroid carcinoma is one cause of primary hyperparathyroidism, a condition in which there is hypercalcemia and dysregulated hypersecretion of PTH. In normal, and in some neoplastic parathyroid cells, PTH secretion is mediated by the cell surface calcium-sensing receptor. We describe the first therapeutic use of a novel molecule, a calcimimetic, that has agonist action at the calcium-sensing...

Carcinoma of the parathyroid gland is a very rare tumor of the head and neck. The largest number of carcinomas are discovered by chance. (intraoperatively, during surgery removal of the parathyroid gland are adenomas). Around 1% of the primary parathyreoidism is caused by the cancer of parathyroid glands. Only 10% of these rare tumors make up dysfunctional cancer of parathyroid glands. There ha...

INTRODUCTION Cancer in the parathyroid gland is rare, but parathyroid cancer is occasionally seen in relation to genetic abnormalities. Due to a limited amount of evidence, the optimal handling of these cases is not clear. Furthermore, the presence of a malignant parathyroid tumor is rarely known at the time of the initial operation; therefore, re-operations are often necessary. The aim of this...

Parathyroid adenomas are benign encapsulated neoplasms that are typically comprised of chief cells and feature a rim of normal parathyroid tissue at their periphery. A small subset can be classified as atypical based on the presence of some histologic features of malignancy, such as a trabecular growth pattern, increased mitotic activity, capsular invasion, and fibrous bands, without definitive...

Key words: lung metastases; parathyroid carcinoma; nodules with calcification. A Tl-201 and Tc-99m subtraction parathyroid scan revealed hot spots in the parathyroidectomy; tertiary hyperparathyroidism upper poles of both thyroid lobes. Serum aluminum concentrations were within the normal range (pre-DFO 6.9 mg/dl, post-DFO 9.4 mg/dl). Based on these

conclusions io-pth levels should become normal or to drop by at least 80% during successful parathyroidectomy. persistent elevations of io-pth after resection of an abnormal gland dictate the need for bilateral exploration. background we hypothesized that io-pth levels would decline to normal or near normal after successful parathyroidectomy. objectives evaluate efficacy and predictive factor o...