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Short stature, mental retardation, and hypoparathyroidism: a new syndrome
1Hospital for Sick Children, London.
Insights
This study describes a new genetic syndrome in children characterized by severe growth failure, distinct facial features, developmental delays, and hypoparathyroidism. The findings suggest a novel inherited condition impacting multiple systems.
Area of Science:
- Genetics
- Pediatrics
- Endocrinology
Background:
- Investigating a cohort of children with severe failure to thrive and dysmorphic features.
- Examining the genetic and clinical manifestations in families with consanguinous marriages.
Observation:
- Eight children presented with extreme failure to thrive, developmental delay, hypoparathyroidism, and abnormal skeletal surveys.
- Consistent dysmorphic facial features included deep-set eyes, depressed nasal bridge, beaked nose, long philtrum, thin upper lip, micrognathia, and large earlobes.
- All patients exhibited significant growth deficits (height, weight, head circumference) and developmental retardation.
Findings:
- Hypocalcemia was present in all children, with hypoparathyroidism confirmed in most.
- Skeletal abnormalities, including medullary stenosis, were observed in seven of eight children.
- Reduced T cell subsets were noted in all tested individuals, indicating potential immunodeficiency.
Implications:
- These findings suggest a new, genetically determined syndrome with multi-system involvement.
- Early identification and genetic counseling are crucial for affected families.
- Further research is needed to elucidate the specific genetic basis and underlying pathophysiology.
Abstract:
Eight children (four boys and four girls) with extreme failure to thrive, dysmorphic features, developmental delay, hypoparathyroidism, and abnormal skeletal survey were studied. They were the products of seven consanguinous marriages, two of the patients being brothers. In the remaining six families, a further four children had affected siblings who had died in infancy. When assessed the children were aged 0.47-12.8 years; SD scores were less than -2 for height, weight, and head circumference in all patients. The children had identical facies with deep set eyes, depressed nasal bridge with beaked nose, long philtrum, thin upper lip, micrognathia, and large floppy earlobes. They were all developmentally retarded. The following abnormalities were found on investigation: hypocalcaemia in all (of whom six of seven had hypoparathyroidism), medullary stenosis and other skeletal survey defects in seven of the eight children, and reduced numbers of T cell subsets in four of four tested. We believe that these children represent a new, as yet undescribed genetically determined syndrome.