Expansion and further delineation of the SETD5 phenotype leading to global developmental delay, variable dysmorphic features, and reduced penetrance

Clin Genet. 2018 Apr;93(4):752-761. doi: 10.1111/cge.13132. Epub 2018 Jan 7.


Diagnostic exome sequencing (DES) has aided delineation of the phenotypic spectrum of rare genetic etiologies of intellectual disability (ID). A SET domain containing 5 gene (SETD5) phenotype of ID and dysmorphic features has been previously described in relation to patients with 3p25.3 deletions and in a few individuals with de novo sequence alterations. Herein, we present additional patients with pathogenic SETD5 sequence alterations. The majority of patients in this cohort and previously reported have developmental delay, behavioral/psychiatric issues, and variable hand and skeletal abnormalities. We also present an apparently unaffected carrier mother of an affected individual and a carrier mother with normal intelligence and affected twin sons. We suggest that the phenotype of SETD5 is more complex and variable than previously presented. Therefore, many features and presentations need to be considered when evaluating a patient for SETD5 alterations through DES.

Keywords: SETD5; exome sequencing; haploinsufficiency; intellectual disability.

MeSH terms

  • Adolescent
  • Adult
  • Body Dysmorphic Disorders / diagnosis
  • Body Dysmorphic Disorders / genetics*
  • Body Dysmorphic Disorders / physiopathology
  • Child
  • Child, Preschool
  • Chromosome Deletion
  • Chromosomes, Human, Pair 3 / genetics
  • Developmental Disabilities / diagnosis
  • Developmental Disabilities / genetics*
  • Developmental Disabilities / physiopathology
  • Exome Sequencing
  • Female
  • Humans
  • Infant
  • Intellectual Disability / diagnosis
  • Intellectual Disability / genetics*
  • Intellectual Disability / physiopathology
  • Male
  • Methyltransferases / genetics*
  • Middle Aged
  • Mutation / genetics
  • Penetrance
  • Phenotype
  • Young Adult


  • Methyltransferases
  • SETD5 protein, human