Unexpected death of children with achondroplasia after the perinatal period
Related Experiment Video
Updated: Aug 10, 2026

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
Published on: November 20, 2015
Insights
Unexpected early childhood deaths in achondroplasia cases may be linked to brain-stem issues. These issues stem from deformities in the foramen magnum and posterior fossa, common in achondroplasia.
Area of Science:
- Pediatric Medicine
- Genetics
- Pathology
Background:
- Achondroplasia is a common form of dwarfism.
- It is characterized by disproportionate short limbs and a large head.
- Genetic mutations affecting the FGFR3 gene are the primary cause.
Observation:
- This report details six cases of achondroplasia.
- Four of these children experienced unexpected deaths during early childhood.
- Clinical and pathological data were collected for all cases.
Findings:
- A significant association was observed between achondroplasia and unexpected early childhood mortality.
- Pathological examination revealed brain-stem lesions in affected children.
- These lesions were secondary to deformities of the foramen magnum and posterior fossa.
Implications:
- These findings suggest a critical need for vigilance regarding potential neurological complications in infants with achondroplasia.
- Early identification and monitoring of foramen magnum and posterior fossa abnormalities may be crucial for preventing sudden infant death.
- Further research into the mechanisms linking skeletal dysplasia to brain-stem dysfunction is warranted.
Abstract:
This report describes six cases of achondroplasia, four of whom died unexpectedly in early childhood. Clinical details and pathological findings are reported. Unexpected death seems to be a feature of children with achondroplasia, and appears to be related to brain-stem lesions secondary to deformities of the foramen magnum and posterior fossa.
Related Concept Videos
Lethal Alleles
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Meiosis vs. Mitosis
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
Nondisjunction
Changes in the Appendicular Skeleton with Age
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Teratogenicity
Esophageal Achalasia

