Introduction

Nager syndrome is a rare genetic disorder that causes malformation of the craniofacial structure (face abnormalities) and pre-axial parts of the upper limbs (absence of thumb, limb defects). It was first described by Nager and De Reynier in 1948.¹ Infants and children with Nager syndrome have conductive deafness, learning disability, and respiratory difficulties.²

The condition can be recognised due to typical facial features, which include an underdeveloped upper and lower jaw, downward-slanting eyes with few lower eyelashes, and unusual outer ears. The syndrome is mostly diagnosed via prenatal ultrasound.² The condition is similar to Treacher-Collins syndrome, both cause identical facial features. These include a small lower jaw, undeveloped cheekbones, slanted eyes, and ear problems. However, the small jaw is usually more severe in Nager syndrome. Limb problems are a key sign of Nager syndrome, and when these are seen along with typical facial features, they help doctors identify the condition.³

Cause: The main cause of Nager syndrome is harmful changes in the SF3B4 gene, which is a part of the spliceosome, a cell structure involved in processing genetic information. Because of this, Nager syndrome is classified as a spliceosomopathy, a type of disease affecting the gene.⁴

Medical considerations

1. Early diagnosis and treatment and genetic counselling: diagnosis often involves genetic testing to identify mutations in the gene, which is commonly associated with Nager syndrome. Genetic counselling is important for the affected families to understand the risks and inheritance patterns^5,6,7
2. Multidisciplinary care: A craniofacial tea,m including plastic surgeons, orthodontists, and speech therapists, is crucial to address anomalies such as cleft palate and jaw abnormalities. Orthopaedic surgeons must manage limb anomalies, including underdeveloped or missing thumbs, forearm bones, and other limb deformities^5,6,7
3. Hearing and speech management: multiple individuals with Nager syndrome have conductive hearing loss and may benefit from hearing aids or other hearing devices. Early speech therapy can help with communication difficulties, especially if there are structural abnormalities in the oral cavity^5,6,7
4. Feeding and respiratory support: infants with Nager syndrome often have difficulties with feeding due to facial structure issues and may require feeding techniques. In severe cases, respiratory support may be necessary, particularly if there are complications with the airway due to facial anomalies^5,6,7
5. Regular monitoring and preventive care: dental care is important due to the high risk of dental problems associated with jaw and palate abnormalities. Continuous monitoring of developmental milestones is essential to provide timely interventions and support^5,6,7

Diagnoses: CT scans and X-rays can help diagnose rare syndromes and plan treatments. 3D printing is also useful for planning surgeries and making custom medical implants. In a few years, as more cases are studied using whole genome sequencing, there are chances to find more links between genetic variations and the symptoms seen in patients.⁴

Educational strategies and classroom accommodations

Assistive technology

Robotic systems are designed for children with special requirements to interact with them in different ways. They help to know how children respond to robots' actions and encourage certain behaviours. These robots can also teach skills and give feedback during therapy sessions. Key areas for developing these robots include imitation, joint attention, and interactive engagement. These are important for both helping children and creating robots that interact like humans. Assistive technology also includes hearing implants and other auditory support devices.⁸

Language and speech therapy

Helping children understand what others say and express their thoughts and ideas. Teach them how to correctly position their mouth and tongue to make sounds (correct phonetics). Working on reducing nasal sounds and air escaping through the nose when they speak. Language therapy also includes sign language, picture exchange communication, and augmentative communications.¹

Summary

Nager syndrome is a rare genetic illness affecting the face and upper limbs, resulting in facial deformities and limb malformations such as missing thumbs. Children with Nager syndrome, which was first reported in 1948, frequently suffer from hearing loss, learning impairments, and difficulty breathing. The condition is distinguished by its distinct facial characteristics, which include underdeveloped jaws, downward-slanting eyes, and odd outer ears, comparable to Treacher-Collins syndrome. It is caused by mutations in the SF3B4 gene, which affects cell function. Its medical and educational considerations discussed above are early diagnosis and genetic counselling, multidisciplinary care, hearing and speech management, feeding and respiratory support, regular monitoring and preventive care, and assistive technology with speech therapy.