The femoral head notch.

Area of Science:

• Pediatric Orthopedics
• Skeletal Development
• Radiology

Background:

• The proximal femoral ossification center in children can present with variations.
• A specific notch-like defect is frequently observed.
• This finding is often misdiagnosed as Legg-Calvé-Perthes disease.

Purpose of the Study:

• To describe the characteristics of a notch-like defect at the proximal femoral ossification center.
• To differentiate this normal variant from pathological conditions like Legg-Calvé-Perthes disease.
• To aid clinicians in accurate diagnosis and avoid unnecessary interventions.

Main Methods:

• Radiographic analysis of pediatric hip imaging.
• Comparative assessment of ossification patterns.
• Description of morphological features of the defect.

Main Results:

• A sharply defined, notch-like defect at the vertex of the proximal femoral ossification center is identified.
• This finding represents a normal developmental variant.
• The defect's morphology is distinct from the irregular patterns seen in Legg-Calvé-Perthes disease.

Conclusions:

• The notch-like defect is a common, benign variant in pediatric proximal femoral ossification.
• Radiologists and orthopedic surgeons should recognize this finding to prevent misdiagnosis of Legg-Calvé-Perthes disease.
• Accurate identification of this variant ensures appropriate patient management.