Pectus Arcuatum: A Pectus Unlike Any Other
Topic overview
Pectus arcuatum is a distinct chest wall deformity caused by premature sternal suture fusion, not abnormal cartilage growth like pectus carinatum. This multicenter study of 34 patients shows 35% have associated malformations (Noonan syndrome, scoliosis, cardiac defects) and orthopedic bracing is ineffective—surgical correction via sternotomy is the definitive treatment.
Key takeaways
- Pectus arcuatum is distinct from pectus carinatum—caused by premature sternal suture fusion, not costal cartilage overgrowth.
- Diagnosis confirmed by lateral chest X-ray or CT showing sternal fusion; 35% have associated malformations (Noonan syndrome, scoliosis, cardiac).
- Orthopedic bracing is ineffective for pectus arcuatum, unlike other pectus deformities.
- Surgical correction (sternotomy with partial chondrocostal resection) is the definitive treatment, ideally performed after skeletal maturity.
- Screen all patients for associated syndromic, musculoskeletal, and cardiac abnormalities given high comorbidity rate.
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