The lethal phenotype of a homozygous nonsense mutation in the lamin A/C gene

The authors report the clinical and histologic phenotypes of a LGMD1B family including a newborn child with a homozygous LMNA nonsense mutation (Y259X). At the heterozygous state the nonsense mutation leads to a classic LGMD1B phenotype; the homozygous LMNA nonsense mutation causes a lethal phenotype.