• E P Nuzhnyi, K V Antonova, M M Tanashyan, and S N Illarioshkin.
• Research Center of Neurology.
• Terapevt Arkh. 2023 Nov 23; 95 (10): 864869864-869.

AbstractHypoparathyroidism is a rare condition characterized by reduced production of parathyroid hormone or tissue resistance which leads to hypocalcemia and hyperphosphatemia. Neurological manifestations often occur as the first symptoms of hypoparathyroidism and are characterized by a wide variety of symptoms of both the central and peripheral nervous systems dysfunction, which requires a differential diagnosis with a wide range of neurological diseases. Two clinical cases illustrating the features of subacute and chronic hypoparathyroidism are presented. In the case of subacute hypoparathyroidism, a young woman presented with severe tetany involving the oculomotor muscles (paroxysmal strabismus), laryngeal muscles (respiratory stridor), body muscles (opisthotonus, «obstetrician's hand») and the development of secondary myopathy. In another case with a long-term chronic course of postoperative hypoparathyroidism, the patient's adaptation to severe hypocalcemia was noted; the clinical features were dominated by cerebral syndromes due to brain structures calcification (Fahr's syndrome). Possible reasons for late diagnosis of hypoparathyroidism, the importance of active detection of symptoms of neuromuscular hyperexcitability and laboratory testing of phosphorus and calcium metabolism are discussed.

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