Myotonia congenita and myoadenylate deaminase deficiency: case report.

Abstract

Approximately 1-2% of the population has a deficiency of the enzyme myoadenylate deaminase. Early reports suggested that patients with myoadenylate deaminase deficiency had various forms of myalgia, and exercise intolerance. However, a deficiency of the enzyme has been described in many conditions, including myopathies, neuropathies, and motor neuron disease. We report a patient with clinical diagnosis of myotonia congenita and absent myoadenylate deaminase reaction on the muscle biopsy. This is the first description of myoadenilate deaminase deficiency with myotonia congenita. Myoadenylate deaminase deficiency is the most common enzymatic deficit of muscle, and the association with other neuromuscular diseases is coincidental.

• Authors: Rosana Herminia Scola, Fabio Massaiti Iwamoto, Carlos Henrique Camargo, Walter Oleschko Arruda, Lineu Cesar Werneck
• Journal: Arquivos de neuro-psiquiatria (Arq Neuropsiquiatr) Vol. 61 Issue 2A Pg. 262-4 (Jun 2003) ISSN: 0004-282X [Print] Germany
• PMID: 12806508 (Publication Type: Case Reports, Journal Article)

Chemical References

• AMP Deaminase

Topics

• AMP Deaminase (deficiency)
• Biopsy
• Child
• Humans
• Male
• Muscle, Skeletal (enzymology, pathology)
• Myotonia Congenita (enzymology, pathology)