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  • Title: Fluctuating clinical myotonia and weakness from Thomsen's disease occurring only during pregnancies.
    Author: Lacomis D, Gonzales JT, Giuliani MJ.
    Journal: Clin Neurol Neurosurg; 1999 Jun; 101(2):133-6. PubMed ID: 10467912.
    Abstract:
    Advances in molecular genetics are allowing better phenotype to genotype correlation of the non-dystrophic myotonic disorders. We report a 32-year-old woman, who first noted myotonia that was associated with weakness during her first pregnancy. The work-up disclosed that she had Thomsen's disease which is not known to be associated with weakness. In addition, her myotonia was of the fluctuating type and occurred (symptomatically) only during two pregnancies. We discuss the evaluation of myotonia in the pregnant woman which led to the diagnosis of Thomsen's disease and we conclude that in exceptional cases, fluctuating myotonia and weakness occurs in autosomal dominant chloride channel myotonia (Thomsen's disease).
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