Short answer · Medically reviewed summary · Last updated: 2026-04-07
Apert Syndrome is a rare genetic condition characterized by the premature fusion of certain skull bones, known as craniosynostosis, along with distinctive facial features and complex syndactyly (webbing) of the hands and feet. Understanding the Condition Apert Syndrome is a form of acrocephalosyndactyly. Because the skull bones fuse too early, the head cannot grow in the normal shape, which often leads to an elongated forehead and widely spaced eyes.
What is Apert Syndrome
What is Apert Syndrome? Plain-language, medically reviewed definition plus the lived reality told by patients.
Apert Syndrome is a rare genetic condition characterized by the premature fusion of certain skull bones, known as craniosynostosis, along with distinctive facial features and complex syndactyly (webbing) of the hands and feet.
Understanding the Condition
Apert Syndrome is a form of acrocephalosyndactyly. Because the skull bones fuse too early, the head cannot grow in the normal shape, which often leads to an elongated forehead and widely spaced eyes. In addition to these structural changes, the syndrome affects the skeletal system, particularly the fingers and toes, which are typically fused together by skin or bone. Many individuals with Apert Syndrome also experience challenges with breathing, dental alignment, and, in some cases, mild to moderate intellectual disability or developmental delays.
Prevalence and Origins
This condition is estimated to occur in approximately 1 in 65,000 to 1 in 88,000 live births, affecting all genders and ethnic groups equally. Apert Syndrome is almost always caused by a sporadic "de novo" mutation in the FGFR2 gene, meaning it is rarely inherited from parents. The underlying mechanism involves a specific genetic "typo" that signals bone cells to fuse prematurely during fetal development.
Differentiating Apert Syndrome
While there are many types of craniosynostosis, Apert Syndrome is distinct due to the severity and specific pattern of the hand and foot malformations. Unlike other syndromes, such as Crouzon syndrome, Apert Syndrome almost always involves complex syndactyly where the middle three fingers and toes are fused. Clinical management is highly multidisciplinary, often requiring coordinated care from neurosurgeons, plastic surgeons, and geneticists to support the healthy development of children living with Apert Syndrome.
Medical Disclaimer: This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
References
- NIH Genetic and Rare Diseases Information Center (GARD)
- Orphanet: The portal for rare diseases and orphan drugs
- Online Mendelian Inheritance in Man (OMIM)
- Apert Syndrome Support International
