Moebius syndrome

Moebius syndrome (also spelled Möbius syndrome) is a rare congenital neurological disorder characterized primarily by the absence or underdevelopment of the 6th (abducens) and 7th (facial) cranial nerves, which control lateral eye movement and facial expression, respectively. This results in facial paralysis and an inability to move the eyes from side to side. Affected individuals are born with a mask-like face, unable to smile, frown, or show facial expressions, and often cannot fully close their eyelids. Feeding difficulties are common in infancy due to impaired sucking ability. Other cranial nerves may also be involved, leading to difficulties with swallowing, speech, and hearing. Beyond the cranial nerve involvement, Moebius syndrome can affect multiple body systems. Limb anomalies are present in a significant proportion of patients, including clubfoot (talipes equinovarus) and hand abnormalities such as brachydactyly or syndactyly. Some individuals may have Poland syndrome (absence of the pectoralis major muscle) as an associated finding. Dental abnormalities, skeletal malformations of the chest wall, and occasional intellectual disability or autism spectrum features have also been reported, though most individuals have normal intelligence. There is no cure for Moebius syndrome, and treatment is supportive and multidisciplinary. Early intervention may include specialized feeding techniques and speech therapy. Surgical options include "smile surgery" (gracilis muscle transplant with nerve transfer), which can restore the ability to smile and significantly improve quality of life and social interaction. Strabismus surgery may address eye alignment issues, and physical and occupational therapy can help with limb and motor difficulties. Regular follow-up with neurology, ophthalmology, orthopedics, and other specialists is recommended throughout life.

Common questions about Moebius syndrome