adolescent idiopathic scoliosis
Pronunciation: sko-lee-OH-sis
Also written as: AIS — adolescent idiopathic scoliosis
A lateral curvature of the spine developing during adolescence with no identifiable underlying cause.
Full Definition
Adolescent idiopathic scoliosis (AIS) is the most common form of scoliosis, typically diagnosed between ages 10-18 years when rapid growth occurs. The condition affects 2-4% of adolescents and is more common in females, particularly for progressive curves requiring treatment. AIS is characterized by a lateral spinal curvature greater than 10 degrees on radiographic measurement, often accompanied by vertebral rotation. Management ranges from observation for mild curves to bracing for moderate curves to surgical intervention for severe progressive deformities.
Usage
Usage note: Not capitalized unless beginning a sentence. AIS is an acceptable abbreviation after first use.
In Context
- "School screening identified a 25-degree thoracic curve consistent with adolescent idiopathic scoliosis." — Orthopedic referral note
- "The patient's adolescent idiopathic scoliosis has progressed 8 degrees since the last visit." — Follow-up examination