Darshana Dixit

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BACKGROUND Successful parathyroidectomy for sporadic primary hyperparathyroidism (pHPT) is predicted by a 50% drop in PTH intra-operatively. Vitamin D is a known inhibitor of PTH secretion and is associated with secondary HPT following adenoma resection. This study examined the impact of 25-hydroxyvitamin D (25OHD) deficiency on perioperative PTH kinetics(More)
BACKGROUND Surgeon-performed cervical ultrasound (SUS) and 99Tc-sestamibi scanning (MIBI) are both useful in patients with primary hyperparathyroidism (PHPT). We sought to determine the relative contributions of SUS and MIBI to accurately predict adenoma location. STUDY DESIGN We performed a database review of 516 patients undergoing surgery for PHPT(More)
CONTEXT A relationship between primary hyperparathyroidism (PHPT) and obesity has been observed but is incompletely understood. Furthermore, obesity has been associated with vitamin D deficiency, suggesting that the three conditions may be linked. OBJECTIVE We hypothesized that PHPT in morbidly obese patients is more severe and that the difference may be(More)
Parathyroid adenomas (PAs) causing primary hyperparathyroidism (PHPT) are histologically heterogeneous yet have been historically viewed as largely monotypic entities arising from clonal expansion of a single transformed progenitor. Using flow cytometric analysis of resected adenomatous parathyroid glands, we have isolated and characterized chief cells,(More)
The molecular mechanisms responsible for aberrant calcium signaling in parathyroid disease are poorly understood. The loss of appropriate calcium-responsive modulation of PTH secretion observed in parathyroid disease is commonly attributed to decreased expression of the calcium-sensing receptor (CaSR), a G protein-coupled receptor. However, CaSR expression(More)
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