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Cri-du-Chat Syndrome

(5p Minus Syndrome)

By

Nina N. Powell-Hamilton

, MD, Sidney Kimmel Medical College at Thomas Jefferson University

Last full review/revision Dec 2021| Content last modified Dec 2021
CLICK HERE FOR THE PROFESSIONAL VERSION

Cri-du-chat syndrome is a rare syndrome in which part of chromosome 5 is missing. The size of the missing part varies, and people who have larger deletions are often more severely affected.

Symptoms of Cri-du-Chat Syndrome

Symptoms of cri-du-chat syndrome often include a characteristic high-pitched, mewing cry that sounds like a kitten crying. This cry may be heard immediately after birth, lasts several weeks, and then disappears. However, not all affected newborns have this distinct cry. An infant with this syndrome may have a low birth weight and a small head with many abnormal features, including a round face, small jaw, wide nose, widely separated eyes, crossed eyes (strabismus Strabismus Strabismus is an intermittent or constant misalignment of an eye so that its line of vision is not pointed at the same object as the other eye. If untreated, strabismus can cause amblyopia ... read more Strabismus ), and abnormally shaped ears set low in the head. Often the infant seems limp. Webbed fingers and toes (syndactyly Finger and Toe Defects The fingers and toes may be abnormally formed, incompletely formed, or missing at birth. Birth defects of the fingers and toes can occur while a baby is developing in the womb. For example,... read more Finger and Toe Defects ) and heart defects are common. There are significant limitations in mental and physical development. Many children with cri-du-chat syndrome survive to adulthood but typically have substantial disabilities.

Diagnosis of Cri-du-Chat Syndrome

  • Chromosomal testing

The diagnosis of cri-du-chat syndrome may be suspected before birth or by the child's physical characteristics after birth. The diagnosis can be confirmed by chromosomal testing. (See also Next-generation sequencing technologies Next-generation sequencing technologies Genetic diagnostic technologies are scientific methods that are used to understand and evaluate an organism's genes. (See also Genes and Chromosomes.) Genes are segments of deoxyribonucleic... read more .)

Treatment of Cri-du-Chat Syndrome

  • Supportive care

Treatment of cri-cu-chat syndrome is supportive.

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