Schuurs-Hoeijmakers syndrome in two patients from Japan

Am J Med Genet A. 2019 Mar;179(3):341-343. doi: 10.1002/ajmg.a.9. Epub 2018 Dec 27.


Schuurs-Hoeijmakers syndrome is a rare disease characterized by intellectual disability and dysmorphic facial features among various physical abnormalities due to PACS1 mutation. To date, 28 patients with a recurrent de novo PACS1 mutation (c.607C > T) have been reported, primarily in Western populations. Here, we describe two Japanese patients with Schuurs-Hoeijmakers syndrome with a recurrent PACS1 mutation. In addition to the typical clinical symptoms, each patient presented novel clinical phenotypes. One patient presented with involuntary movements and was treated with trihexyphenidyl hydrochloride. We hypothesized that the PACS1 mutation leads to an inherent dopaminergic insufficiency that underlies the developing symptoms along with the neurodevelopmental processes. The second patient was diagnosed with lipomyelomeningocele during an examination for severe constipation at the age of 2 years and 8 months. The diagnosis of lipomyelomeningocele in this patient was delayed due to the lack of cutaneous lesions. As the majority of patients with PACS1 mutation present constipation, underdiagnosis of lipomyelomeningocele is a possibility. As the phenotypic expansion of the patients with Schuurs-Hoeijmakers syndrome was not fully recognized, additional studies are needed to clarify the clinical spectrum.

Keywords: PACS1; Schuurs-Hoeijmakers syndrome; c.607C > T; lipomyelomeningocele.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Abnormalities, Multiple / diagnosis*
  • Abnormalities, Multiple / genetics*
  • Brain / abnormalities
  • Brain / diagnostic imaging
  • Child, Preschool
  • Craniofacial Abnormalities / diagnosis*
  • Craniofacial Abnormalities / genetics*
  • Electroencephalography
  • Facies
  • Female
  • Humans
  • Intellectual Disability / diagnosis*
  • Intellectual Disability / genetics*
  • Magnetic Resonance Imaging
  • Muscular Atrophy / diagnosis*
  • Muscular Atrophy / genetics*
  • Mutation*
  • Phenotype*
  • Syndrome
  • Vesicular Transport Proteins / genetics*


  • PACS1 protein, human
  • Vesicular Transport Proteins

Supplementary concepts

  • Facial Dysmorphism with Multiple Malformations