Recessive spondylocostal dysostosis: two new cases

Area of Science:

• Genetics
• Orthopedics
• Developmental Biology

Background:

• Spondylocostal dysostosis (SCD) is a rare skeletal malformation syndrome.
• It is characterized by vertebral segmentation defects and rib fusions.
• Genetic heterogeneity is known, with autosomal dominant and recessive forms described.

Observation:

• Two sisters presented with clinical features of spondylocostal dysostosis.
• Key findings included a short neck, short trunk, and reduced upper to lower body segment ratio.
• Vertebral and costal malformations were evident, alongside normal intelligence.

Findings:

• The clinical presentation and family history strongly indicate an autosomal recessive inheritance pattern.
• This specific presentation aligns with previously described autosomal recessive forms of SCD.
• The siblings' shared phenotype supports a genetic etiology within the family.

Implications:

• This case contributes to understanding the phenotypic spectrum of spondylocostal dysostosis.
• Identifying the specific gene mutation could aid in genetic counseling and diagnosis.
• Further research into autosomal recessive SCD is warranted to elucidate its molecular mechanisms.