Cri Du Chat, also known as 5p monosomy, is a rare chromosomal syndrome caused by the partial deletion of a segment of the 5th chromosome. The syndrome’s name derived from the infant’s cry, which is high-pitched and sounds like a cat (as cri du chat literally translates to “cat’s cry”). People who have 5p monosomy have very distinctive features, including microcephaly (small head), very round face, small chin and wide set eyes, and a small nose. The majority of those diagnosed experience some problems in motor control particularly in skills that require the use of motor coordination and fine motor skill and heart problems are common. There is currently no treatment availiable.