Résumé :
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Detailed clinical observations of ten patients with mild Fukuyama-type congenital muscular dystrophy (FCMD), confirmed by genetic analysis as having the ancestral founder haplotype, followed for 7-29 years, are reported. Muscle involvement was milder than that in typical cases, and differences such as better motor ability, compatible with transient ambulation, transient ability to step up stairs, persistence of deep tendon reflexes up to school age, relatively slow involvement of calf muscles confirmed by computed tomography, and longer life span, up to 30 years old, were found. Dilated cardiomyopathy was observed in adulthood. Cortical dysplasia and ophthalmological abnormalities were not prominent, but a higher frequency of cavum septum pellucidum and cerebellar cysts were found. Pathological study revealed retinal dysplasia in one case without any clinical ophthalmological findings except mild myopia. No significant environmental factors that influence the clinical course of FCMD were identified.
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