Opitz syndrome is a genetically inherited disorder. It manifest because of a defect in the metabolism of cholesterol in the body. Although we consider cholesterol as 'bad', too little of which could cause catastrophic manifestations. Children with Opitz syndrome are considered as suffering from a mild to moderate form of the condition as severe manifestations may not be compatible with life.
Children with Opitz could display signs such as lethargy, hearing loss, visual loss, failure to thrive, constipation, difficulty in breathing, or even heart failure. At the same time, mild to moderate mental retardation may also be present.
Unfortunately there are no treatment for Opitz although cholesterol supplements have shown to prolong life. Supportive therapy is the mainstay of treatment and many support groups can be found in the internet.
Please feel free to ask if you need more clarifications.