Coffin-Lowry syndrome is a rare genetic disorder characterized by craniofacial (head and facial) and skeletal abnormalities, delayed intellectual development, short stature, and hypotonia. Characteristic facial features may include an underdeveloped upper jaw bone (maxillary hypoplasia), a broad nose, protruding nostrils (nares), an abnormally prominent brow, down-slanting eyelid folds (palpebral fissures), widely spaced eyes (hypertelorism), large low-set ears, and unusually thick eyebrows. Skeletal abnormalities may include abnormal front-to-back and side-to-side curvature of the spine (kyphoscoliosis), unusual prominence of the breastbone (pigeon chest, or pectus carinatum), dental abnormalities, and short, hyperextensible, tapered fingers. Other features may include feeding and respiratory problems, developmental delay, hearing impairment, awkward gait, stimulus-induced drop episodes, and heart and kidney involvement. The disorder affects males and females in equal numbers, but symptoms are usually more severe in males. The disorder is caused by a defective gene, RSK2, which is found in 1996 on the X chromosome (Xp22.2-p22.1). Thus, the syndrome is typically more severe in males because males have only one X chromosome, while females have two. It is unclear how changes (mutations) in the DNA structure of the gene lead to the clinical findings.
There is no cure and no standard course of treatment for Coffin-Lowry syndrome. Treatment is symptomatic and supportive, and may include physical and speech therapy and educational services.
The prognosis for individuals with Coffin-Lowry syndrome varies depending on the severity of symptoms. Early intervention may improve the outlook for patients. Life span is reduced in some individuals with Coffin-Lowry syndrome.
The NINDS supports and conducts research on genetic disorders, such as Coffin-Lowry syndrome, in an effort to find ways to prevent, treat, and ultimately cure these disorders. Information from the National Library of Medicine’s MedlinePlusCraniofacial Abnormalities
Coffin-Lowry Syndrome Foundation
675 Kalmia Place, NW
Issaquah, WA 98027
Clearinghouse for information on CLS. Provides a general forum for exchanging experiences, advice, and information with other CLS families. Works to facilitate referrals of newly diagnosed individuals and to encourage medical and behavioral research in order to improve methods of social integration of CLS individuals.
Information sourced through CNF’s partnership with The National Institute of Neurological Disorders and Stroke (NINDS), US National Institutes of Health.