Cockayne Syndrome (CS) is a rare genetic disorder characterized by poor growth, microcephaly, progeria (premature aging), sensitivity to sunlight, moderate to profound developmental and neurological delays, and a shortened lifespan. CS is inherited in an autosomal recessive pattern. In order for a child to be affected by CS, he or she must inherit a mutation (-) in the same CS gene from both parents. The parents and other carriers of a single CS gene mutation remain healthy. Once a couple are known to carriers, they have a 1 in 4 (25%) chance of having another child with CS (Share and Care Cockayne Syndrome network).