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Published on: July 14, 2023
Neuromyotonia in idiopathic hypoparathyroidism
Thomas Zambelis1, Dimitrios Licomanos, Athanassios Leonardos
1Department of Neurology, Aeghinition Hospital, University of Athens, 74, Vassilissis Sofias Avenue, 11528 Athens, Greece. tzabelis@med.uoa.gr
Summary
Idiopathic hypoparathyroidism can manifest with neurological symptoms like neuromyotonia, characterized by muscle hyperexcitability. This case highlights the importance of considering endocrine disorders in patients with neuromuscular complaints.
Area of Science:
- Neurology
- Endocrinology
- Clinical Electrophysiology
Background:
- Idiopathic hypoparathyroidism is a rare endocrine disorder characterized by deficient parathyroid hormone production.
- It can lead to hypocalcemia, which has diverse clinical manifestations, including neurological and neuromuscular symptoms.
Observation:
- A 62-year-old man presented with bilateral cataracts, proximal muscle weakness, and impaired hand relaxation post-contraction.
- These symptoms prompted an investigation into potential underlying causes.
Findings:
- The patient was diagnosed with idiopathic hypoparathyroidism.
- Electrophysiological studies revealed spontaneous motor unit action potentials consistent with neuromyotonia, including duplets, triplets, and multiplets with high intra-burst frequencies and waning amplitudes.
Implications:
- This case underscores the association between idiopathic hypoparathyroidism and neuromyotonia.
- It emphasizes the need for comprehensive diagnostic workups in patients with unexplained neuromuscular excitability, including assessment for endocrine dysfunction.
- Early diagnosis and management of hypoparathyroidism can potentially alleviate neurological symptoms.
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