Generalized arterial calcification of infancy
vascular disease that is characterized by generalized calcification of the arterial internal elastic lamina, leading to rupture of the lamina and occlusive changes in the tunica intima with stenosis and decreased elasticity of the vessel wall
Generalized arterial calcification of infancy (GACI) is an extremely rare genetic disorder. It is caused by mutations in the ENPP1 gene in 75% of the subjects or in mutations in the ABCC6 genes in 10% of patients. However, sometimes individuals affected with GACI do not have mutations in the ENPP1 or ABCC6 gene and in those cases the cause of the disorder is unknown.
The condition usually affects infants during the first 6 months of life. This condition is inherited as an autosomal recessive pattern. It is characterized by generalized calcification of the arterial internal elastic lamina, leading to rupture of the lamina and occlusive changes in the tunica intima with stenosis and decreased elasticity of the vessel wall. Unfortunately, many infants die of vaso-occlusive disease, especially of the coronary arteries.
Types
There are 2 forms of GACI that can be indicated on a genetic test:
GACI Type 1 is caused by mutations in the ENPP1 gene. It is called ENPP1 Deficiency. Patients with the ENPP1 Deficiency are at risk of developing Autosomal Recessive Hypophosphatemic Rickets Type 2 (ARHR2).
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