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  • Title: Clinical variability in a Japanese hereditary lymphedema type I family with an FLT4 mutation.
    Author: Mizuno S, Yamada Y, Yamada K, Nomura N, Wakamatsu N.
    Journal: Congenit Anom (Kyoto); 2005 Jun; 45(2):59-61. PubMed ID: 15904433.
    Abstract:
    Hereditary lymphedema type I (Milroy disease) is a rare autosomal dominant disease resulting from mutations of FLT4 encoding the vascular endothelial growth factor receptor-3. Patients develop edema of the legs and feet, resulting in chronic swelling of the lower extremities from the neonatal period. Here we report a Japanese family with 10 affected members of five generations of hereditary lymphedema type I. We identified a previously reported missense mutation of G857R in one allele of FLT4 from three affected individuals of three generations, the mother of whom presented only hemi-lymphedema of the left foot. Thus, the clinical features of hereditary lymphedema type I caused by a FLT4 mutation are heterogeneous and it would be appropriate to consider FLT4 mutations even in a patient with hemi-lymphedema of the foot.
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