Keratoderma Palmaris et Plantaris Congenitalis

Macaulay, Duncan

doi:10.1136/bmj.1.4702.334

Cited by 10 publications

References 2 publications

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Myxedema, Pseudomyotonia, and Myotonia Congenita

Jarcho¹

1958

Arch Intern Med

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For the student of neuromuscular disorders, the thyroid gland poses several unsolved problems. Thus, hyperthyroidism has been shown to be associated with myopathy and ophthalmoplegia and may be related in some manner to myasthenia gravis and periodic paralysis." Similarly, the concurrence of hypothyroidism and muscle dysfunction has been noted repeatedly.2 Again, certain questions have arisen concerning the part played by thyroid hypofunction in myotonia. Five principal types of association are at issue.A majority of patients with evident myxedema will show a delay in the relaxation of muscle after deep tendon reflexes are elicited. The phenomenon has been termed pseudomyotonia. Lambert3 demonstrated that the delay includes all phases of the tendon reflex, but only the slowing of relaxation is obvious clinically. Hormone replacement sufficient to correct the basal metabolic rate and the clinical signs of myxedema eradicates the pseudomyotonia. While the nature of the disturbance in muscle function is not explained, the etiologic relation to hypothyroidism is clear. The phenomenon is noted here in order to differentiate it from those which follow.Myotonic dystrophy has attracted the attention of endocrinologists because of the gonadal deterioration, alopecia, and cataracts

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