Genetic aspects of early childhood scoliosis

Area of Science:

• Pediatric Orthopedics
• Medical Genetics
• Developmental Biology

Background:

• Early onset scoliosis presents diagnostic and management challenges.
• Infantile idiopathic scoliosis and congenital scoliosis represent distinct etiological categories.
• Understanding familial recurrence risks is crucial for genetic counseling.

Purpose of the Study:

• To evaluate and differentiate early onset scoliosis subtypes in families.
• To assess associated conditions and recurrence risks for infantile idiopathic and congenital scoliosis.
• To investigate the etiological relationship between vertebral malformations and neural tube defects.

Main Methods:

• Retrospective evaluation of 87 families with early onset scoliosis.
• Classification into resolving infantile idiopathic scoliosis, progressive infantile idiopathic scoliosis, and congenital scoliosis groups.
• Subdivision of congenital scoliosis based on neural arch defects.
• Analysis of associated conditions, developmental outcomes, and familial recurrence risks.

Main Results:

• Resolving infantile idiopathic scoliosis often co-occurred with plagiocephaly and showed spontaneous recovery.
• Progressive infantile idiopathic scoliosis was associated with a higher incidence of mental retardation.
• Congenital scoliosis showed a significant association with other malformations, but not mental retardation.
• A familial risk of 4% for neural tube defects was observed in families with congenital scoliosis, irrespective of neural arch defects.
• A single hemivertebra was associated with increased risk of neural tube defects, suggesting an etiological link.

Conclusions:

• Infantile idiopathic scoliosis and congenital scoliosis have distinct clinical and etiological profiles.
• Congenital scoliosis, particularly with vertebral malformations, carries an increased familial risk for neural tube defects.
• Vertebral malformations and neural tube defects may share common etiological pathways.
• Low recurrence risk for scoliosis itself, but specific risks for associated conditions warrant attention.