Lethal Congenital Contracture Syndrome 1 / Lethal Arthrogryposis with Anterior Horn Cell Disease (GLE1)
Pathogenic variants in the GLE1 gene cause two related disorders, known as lethal congenital contracture syndrome 1 and lethal arthrogryposis with anterior horn cell disease. Lethal congenital contracture syndrome 1 is a fatal form of arthrogryposis, a disorder characterized by non-progressive joint contractures that are present at birth. The spinal cord is thin and the skeletal muscles are extremely small and underdeveloped. Fetuses affected by this disorder die before birth. Lethal arthrogryposis with anterior horn cell disease presents at birth with multiple joint contractures and facial anomalies. Anterior horn motor neurons, which control movement of the trunk and head, are degenerated. Death occurs in the first days of life. Specific GLE1 variants have been associated with the two diseases, and therefore the phenotype may be predicted in most patients based on the genetic variants inherited.
For information about carrier frequency and residual risk, please see the residual risk table.