Endocrine Abstracts

Rationale: In the diagnosis of hypopituitarism, the glucagon stimulation test allows for the simultaneous and safe evaluation of the somatotropic and corticotropic axes; recent data have highlighted a stimulating action also on the neurohypophyseal secretion of arginine-vasopressin. This procedure involves the intramuscular or subcutaneous administration of 1-1.5 mg of glucagon based on the patient’s weight (respectively less or more than 90 kg). Nowadays no data are avai...

Parathyroid carcinoma (PC) is a rare neoplasia responsible for about 1% of primary hyperparathyroidism (PHPT). Differently from patients with its benign counterpart, the phenotype of these patients is characterized by severe PHPT and hypercalcemia. The aim of this study was to describe a series of PC casesrecorded in the regional cancer network of Piedmont and Valle d’Aosta, Italy (Rete Oncologica del Piemonte e della Valle d’Aosta) from 2007 to 2017, including 25 ...

Context: Hyponatremia is associated with an increased risk of osteoporosis and fractures, and in recent years increasing evidence is accumulating in favor of a likely causal relationship between hyponatremia and bone loss. In rat models, the induction of hyponatremia enhances osteoclast activation and bone catabolism. In humans, the correction of hyponatremia by tolvaptan or SGLT2-inhibitors has a favorable effect on bone turnover markers, possibly due to an interplay both wit...

Primary hyperparathyroidism (PHPT) is rare in the pediatric population, with an estimated incidence of 0.5–5 cases per 100,000 person-years in children. Data regarding the clinical phenotype, the surgical outcomes are scarce. The objective of our study was to retrospectively analyze the phenotype of apparently sporadic PHPT in patients ≤21 years in major endocrinology reference centers in Italy. None of the patients had known familial syndromes. A total of 41 patien...

X-linked hypophosphatemia (XLH) is a rare genetic disease due to inactivation of the PHEX gene, which results in enhanced secretion of the phosphaturic hormone fibroblast growth factor 23 (FGF23); the latter induces renal phosphate wasting and hypophosphatemia. Skeletal and dental anomalies and recently described increase in cardiovascular risk are typical clinical findings. We retrospectively evaluated 58 adult patients with XLH from 9 Italian tertiary centres [34 females, 24...