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Disorders of calcium and phosphorus metabolism can cause severe complications that require changing of therapeutic strategies and a long treatment in a hospital. The prevalence of diseases accompanied by calcium metabolism disorders varies from low to moderate. For example, primary hyperparathyroidism, as one of the most common causes of pathological changes in calcium metabolism due to parathyroid hormone hypersecretion, occurs with a frequency of 85 to 233 cases per 100 thousand people.
View Article and Find Full Text PDFProbl Endokrinol (Mosk)
November 2024
Calcium is the most abundant mineral in the human body. About 99% of calcium is deposited in the bones in the form of hydroxyapatite and only 1% is located in the intracellular and extracellular fluid. Ionized calcium, which makes up about 50% of the total amount of circulating calcium, is biologically active; the remaining percentage is bound to plasma proteins (40%, of which albumin accounts for 90%, and globulins for 10%), or is in complex with anions (10%) such as citrate, lactate, bicarbonate, phosphate.
View Article and Find Full Text PDFJCEM Case Rep
February 2025
Endocrinology and Diabetes Center, Yokohama Rosai Hospital, Yokohama 222-0036, Japan.
Hyperparathyroidism-jaw tumor syndrome (HPT-JT) is a rare hereditary disorder caused by pathogenic gene variants. We report the case of a patient with HPT-JT who carried a novel germline pathogenic variant. A 27-year-old woman presented with thirst, polyuria, fatigue, constipation, and a history of fibro-osseous mandible lesions and endometrial polyps.
View Article and Find Full Text PDFBone Rep
March 2025
Department of Joint and Trauma Surgery, The Third Affiliated Hospital, Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou 510630, China.
Phosphaturic mesenchymal tumor (PMT) is a rare benign mesenchymal tumor characterized by excessive secretion of fibroblast growth factor 23 (FGF23), leading to phosphate loss and systemic osteomalacia. Despite recent progress in PMT research, no consensus on diagnosis and treatment guidelines has been established. This case series describes the clinical and pathological features of six pathologically confirmed PMT patients treated at the Third Affiliated Hospital of Sun Yat-sen University from 2010 to 2024, aiming to provide new insights for the management of this condition.
View Article and Find Full Text PDFAME Case Rep
October 2024
Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, SAU.
Background: Parathyroid carcinoma is a rare and challenging malignancy, often confirmed by histopathological analysis. Due to its rarity, it can present in atypically. We present a case of parathyroid carcinoma with an unusual course of pulmonary metastasis emphasizing the complexities of its diagnosis and management.
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