Classification of Pectus Excavatum According to Objective Parameters From Chest Computed Tomography

Area of Science:

• Thoracic surgery
• Medical imaging
• Quantitative morphology

Background:

• Pectus excavatum classification has historically relied on subjective assessments.
• A need exists for an objective classification system based on measurable data.

Purpose of the Study:

• To develop and validate a novel classification system for pectus excavatum.
• To utilize objective morphologic variables from CT scans for classification.

Main Methods:

• Objective morphologic variables were measured from chest CT scans of 230 patients.
• Hierarchical clustering was applied to the measured indexes for classification.
• Clinical relevance of the proposed classification was assessed.

Main Results:

• Patients were categorized into typical (85.7%) and atypical (14.3%) groups.
• Seven distinct pectus excavatum subtypes were identified through clustering.
• Atypical pectus excavatum subtypes showed unique sternal deformities and associations with scoliosis.

Conclusions:

• Computed tomography (CT) based hierarchical clustering provides an objective method for pectus excavatum classification.
• The new system identifies seven distinct pectus excavatum subtypes, improving diagnostic precision.
• This objective classification aids in understanding pectus excavatum variations and associated conditions.