OBJECTIVE To investigate why some patients with single parathyroid adenomas have negative preoperative sestamibi scans. DESIGN Retrospective review. SETTING Tertiary care center. PATIENTS Twenty-one patients with false-negative (FN) scans were compared with 22 patients with true-positive (TP) scans. All patients had single parathyroid adenomas. INTERVENTIONS Neck exploration and removal...

Background: Primary hyperparathyroidism (PHPT) results from excessive parathyroid hormone one or more overactive gland(s). An estimated 90% of PHPT cases are sporadic, and up to 10% inherited, comprising hereditary (HHPT). Genetic testing can aid in diagnosis management influence other family members.

HYPOTHESIS Preoperative clinical, biochemical, and imaging studies could be used to reliably select patients with single-gland primary hyperparathyroidism who could undergo minimally invasive parathyroidectomy and to determine whether additional perioperative testing is necessary. DESIGN Retrospective analysis. SETTING Tertiary referral center. PATIENTS A total of 238 patients who underwe...

Intrathyroidal parathyroid carcinoma is an exceedingly rare cause of primary hyperparathyroidism. A 51-year-old African American female presented with goiter, hyperparathyroidism, and symptomatic hypercalcemia. Sestamibi scan revealed diffuse activity within an enlarged thyroid gland with uptake in the right thyroid lobe suggestive of hyperfunctioning parathyroid tissue. The patient underwent t...

The parathyroid gland secretes parathyroid hormone (PTH) which is a key element in the regulation of serum calcium. The PTH elevates serum calcium activities by regulating its action on the bones, kidneys and small intestine. The set point of PTH secretion defines the sensitivity of the parathyroid glands to calcium concentration. Secondary hyperparathyroidism (SHPT) is a common complication of...

The aim of this study is to establish possibilities of using cytology in the diagnosis of parathyroid gland adenoma. 475 patients, all suspected to have parathyroid gland disease, were examined over a three-year period (from 1 of January 2006 to 31 of December 2008) in the Clinical Department of Nuclear Medicine and Radiation Protection, University Hospital Center Zagreb, Croatia. Ultrasound gu...

A case is described of primary hyperparathyroidism in a patient with both a parathyroid cyst within the thymus gland and a concomitant parathyroid adenoma. The parathyroid adenoma contained microcystic areas of degeneration, and it is thought that the parathyroid cyst reflected degenerative change in a pre-existing adenoma. Parathyroid cyst should be considered in the differential diagnosis of ...

Introduction: Hyperparathyroidism is presented with increased parathyroid hormone (PTH) secretion due to hyperfunctioning of one or more of the four parathyroid glands. Primary hyperparathyroidism (p-HPT) can be due to parathyroid adenoma, hyperplasia or carcinoma of the parathyroid gland. Secondary hyperparathyroidism (s-HPT) is usually a response to hypocalcaemia and consecut...

Background: Hyperparathyroidism (HPT) is an endocrine disease characterized by a hypercalcemic state due to hyper secretion of parathyroid hormone. Imaging in parathyroid disease (hyperparathyroidism) is aimed at localizing enlarged parathyroid glands after a biochemical diagnosis of hyperparathyroidism has been made. By precisely identifying the number and location of abnormal parathyroid glan...