CHARGE syndrome is a rare genetic condition that affects multiple organ systems, occurring in roughly 1 in 10,000 births. The name is an acronym for six features originally used to identify it: coloboma (a gap in part of the eye), heart defects, atresia of the choanae (blocked nasal passages), retarded growth and development, genital abnormalities, and ear anomalies including deafness. Not every child with CHARGE has all six features, and the condition varies widely in severity from one person to the next.
What Causes CHARGE Syndrome
CHARGE syndrome is caused by a mutation in the CHD7 gene, which plays a critical role in early embryonic development. This gene helps direct the formation of many structures throughout the body, which is why a single genetic change can produce such a wide range of physical effects. Most cases result from a new, spontaneous mutation rather than one inherited from a parent, meaning it typically appears in families with no prior history of the condition.
The Features Behind the Acronym
Each letter in CHARGE points to a specific area of the body that can be affected, though the combination and severity differ from child to child.
Coloboma
A coloboma is a gap or missing piece of tissue in the eye, most often in the iris (the colored part) or the choroid (a layer of tissue at the back of the eye). Some children also have unusually small eyes, a related finding called microphthalmia. Depending on where the gap is and how large it is, vision can range from near-normal to significantly impaired.
Heart Defects
Congenital heart defects are common in CHARGE and span a wide spectrum. The most frequently seen are conotruncal defects (problems with the large vessels leaving the heart, such as Tetralogy of Fallot), which appear in 31 to 42 percent of affected individuals, and atrioventricular septal defects (holes between the heart’s chambers along with valve abnormalities), found in 13 to 17 percent. Aortic arch abnormalities and a persistent opening between two major blood vessels called a patent ductus arteriosus also appear at higher rates than in the general population. Some heart defects are mild enough to resolve on their own or need no treatment, while others require surgery in infancy.
Choanal Atresia
The choanae are the passages connecting the back of the nose to the throat. In choanal atresia, one or both of these passages are blocked by bone or tissue. Because newborns breathe primarily through their noses, a bilateral blockage can cause immediate breathing difficulty at birth and often requires urgent surgical correction. A one-sided blockage may be less obvious at first and show up later as chronic nasal congestion or difficulty feeding.
Growth and Development
Children with CHARGE syndrome frequently experience slower physical growth and developmental delays. Hormonal factors play a significant role: many children have reduced function of the hypothalamus or pituitary gland, the brain structures that regulate growth hormones and puberty. This can lead to short stature and delayed or incomplete puberty, particularly in boys, who may have undescended testes or other genital differences visible at birth.
Ear Abnormalities and Hearing Loss
Ear involvement is one of the most consistent features of CHARGE. The outer ears often have a distinctive shape, sometimes described as short, wide, and cup-like, with reduced cartilage. Inside, the middle ear bones may be malformed, and the semicircular canals of the inner ear (the structures responsible for balance) are frequently underdeveloped or absent. Hearing loss can be sensorineural (nerve-based), conductive (related to the middle ear structures), or a combination of both, and it ranges from mild to profound.
Cranial Nerve Problems
One of the most clinically significant aspects of CHARGE syndrome is widespread dysfunction of the cranial nerves, the nerves that run directly from the brain to the face, ears, and throat. In a study of individuals with CHARGE, 92 percent showed signs of at least one cranial nerve problem, and 72 percent had more than one nerve affected.
The practical effects of cranial nerve dysfunction touch daily life in concrete ways. Weak chewing and sucking (from the fifth cranial nerve) can make feeding extremely difficult for infants. Facial palsy from the seventh nerve may affect facial expression and the ability to close the eyes fully. Damage to the eighth nerve causes both the hearing loss and the balance problems that are hallmarks of the syndrome. Swallowing difficulties tied to the ninth and tenth nerves can lead to aspiration, where food or liquid enters the airway, creating a risk of pneumonia. Many children also have a reduced or absent sense of smell.
How CHARGE Is Diagnosed
Because no single feature is present in every case, diagnosis relies on recognizing a pattern of findings. The most widely used clinical criteria, proposed by Blake and colleagues, identify four major features: coloboma, choanal atresia, characteristic ear anomalies (inner, middle, or outer), and cranial nerve dysfunction. A diagnosis is considered when a child has all four major features, or three major features plus at least one minor one. Minor criteria include genital differences, developmental delay, heart defects, growth deficiency, cleft lip or palate, and distinctive facial features.
A later system, sometimes called the Verloes criteria, narrows the major signs to three: coloboma, choanal atresia, and hypoplastic (underdeveloped) semicircular canals. Genetic testing for mutations in the CHD7 gene can confirm the diagnosis, though not every person with clinical CHARGE has a detectable CHD7 mutation.
What Care Looks Like
There is no single treatment for CHARGE syndrome because the condition involves so many different body systems. Instead, care is built around a child’s specific combination of features. Babies with CHARGE often spend weeks to months in the hospital after birth, and many undergo multiple surgeries during their first year of life. These may include procedures to open blocked nasal passages, repair heart defects, or address feeding difficulties.
Long-term management typically involves a team of specialists. Ear, nose, and throat doctors address airway and hearing concerns. Audiologists fit hearing aids or help evaluate candidacy for cochlear implants. Cardiologists monitor heart function. Geneticists coordinate the overall diagnostic picture, while nephrologists and urologists manage any kidney or genital issues. Endocrinologists may step in to support growth or guide puberty with hormone therapy when needed. Speech, occupational, and physical therapists play ongoing roles in helping children reach developmental milestones.
Because balance problems from abnormal semicircular canals are nearly universal, children with CHARGE often sit, stand, and walk later than their peers. Physical therapy focused on balance and motor skills can make a significant difference. Vision and hearing supports, including early intervention programs for children with dual sensory loss, are equally important for communication and learning.
Outlook and Survival
Infant mortality in CHARGE syndrome is higher than average, driven primarily by severe heart defects or brain abnormalities involving the brainstem or cerebellum. For children who survive the first year, however, life expectancy has improved substantially with advances in surgical techniques and coordinated care. Many individuals with CHARGE syndrome live into adulthood, attend school, hold jobs, and live with varying degrees of independence depending on the severity of their specific features.
The trajectory varies enormously. Some people have mild involvement and need relatively few interventions, while others face complex medical and developmental challenges throughout life. Early diagnosis, prompt surgical care for life-threatening features, and consistent access to a multidisciplinary team all contribute to better long-term outcomes.