Table 3 Recommendations regarding follow-up and examination of individuals with a variant in CHD8.

From: The phenotypic spectrum and genotype-phenotype correlations in 106 patients with variants in major autism gene CHD8

System

Evaluation/concern

Clarification

Growth

Assessment of growth parameters

Tall stature and macrocephaly are reported frequently.

Neurological

Developmental evaluation

Screening for motor and speech delay and general cognitive abilities/intellectual disability.

Neuropsychiatric evaluation

There is a higher risk for ASD, short attention span, psychiatric conditions, abnormal fear/anxiety-related behaviour and emotion/affective behaviour, sleeping problems, abnormal social behaviour and repetitive compulsive behaviour. Preferably performed at a young age.

Neurological evaluation

In this evaluation, there should be special attention to hypotonia.

Magnetic resonance imaging (MRI) of the brain

Consider screening for structural abnormalities of the brain if indicated neurological features.

Electroencephalography (EEG)

Advised on indication when there is suspicion on seizures.

Gastrointestinal

 

Special attention for constipation.

Musculoskeletal

 

Clinical examination for abnormality of the curvature of the vertebral column, jaw abnormalities and pes planus. X-ray when indicated after the examination.

Genitourinary

Ultrasound for abnormalities of the kidneys and genital system.

Should be performed at least once at diagnosis with follow-up if abnormalities are present

Other

Screening for neonatal icterus

Higher risk for neonatal hyperbilirubinemia: Explanation/awareness for parents.

Glabellar skin

Alertness for glabellar haemangioma

Consultation of clinical geneticist/genetic counsellor