Any Coffin-Siris syndrome in which the cause of the disease is a mutation in the SMARCA4 gene. The disease is intellectual disability, autosomal dominant 16 (MONDO_0013821). Also known as: COFFIN-SIRIS syndrome 4, CSS4, Coffin-Siris syndrome caused by mutation in SMARCA4, MRD16, SMARCA4 Coffin-Siris syndrome, SMARCA4-related BAFopathy, autosomal dominant intellectual disability 16, autosomal dominant mental retardation 16.