Treacher Collins Syndrome

Treacher Collins syndrome is a condition that affects the development of bones and other tissues of the face. The signs and symptoms of this disorder vary greatly, ranging from almost unnoticeable to severe. it caused by abnormal development of the facial 1 st and 2 nd pharyngeal arches . its an autosomal dominant genetic disorder which is caused by mutation in chromosome 5 {5q32-33 } in gene TCOF1 called treacle.