Hipopara-Red, Real Life Experience in 322 Patients with Hypoparathyroidism

Context Hypoparathyroidism is a rare disease and, as such, its natural history, long-term complications, and correct clinical management remain unclear. Objective To describe the natural history and clinical characteristics of the disease. Design and Setting To present a retrospective observational analysis from 7 specialized centers in Buenos Aires, Argentina. Patients Chronic hypoparathyroid patients followed-up between 1985 and December 2018. Main Outcome Measures Data on demographics, etiology, clinical complications, biochemical parameters, dual-energy x-ray absorptiometry (DXA) values, and treatment doses were collected. Results A total of 322 subjects with chronic hypoparathyroidism were included; 85.7% were female, the mean age was 55.2 ± 16.8 years, and the mean age at diagnosis was 43.8 ± 16.8 years. Prevalence of surgical hypoparathyroidism was 90.7%, with the most common causes being thyroid carcinoma and benign thyroid disease. A history of hypocalcemia requiring hospitalization was present in 25.7% of the whole group and in 4.3% of patients who had a history of seizures. Overall, 40.9% of our patients had reported at least 1 neuromuscular symptom. Renal insufficiency was present in 22.4% of our patients and was significantly associated with age (P < 0.0001). Hyperphosphatemia was present in 42% of patients. A history of severe hypocalcemia, paresthesias, tetany, ganglia calcifications, seizures, and cataracts was significantly higher in nonsurgical patients. Conclusion Although these patients were followed-up by experienced physicians, clinical management was heterogeneous and probably insufficient to assess all the potential complications of this chronic disease. Almost 70% of the study's group of patients met the experts' indications for considering the use of rhPTH 1-84. Being aware of this fact is the 1st step in improving our medical management of this disease in the future.