[Lacunae between metaphyses and growth cartilage]

Area of Science:

• Pediatric Radiology
• Skeletal Dysplasias
• Bone Development

Background:

• Metaphyseal growth defects of the distal femur are observed in pediatric imaging.
• These defects are typically bilateral and well-demarcated.
• Distinguishing these findings from pathology is crucial.

Purpose of the Study:

• To characterize the imaging features of distal femur metaphyseal growth defects.
• To differentiate these benign findings from pathological bone lesions.
• To understand their natural history and implications.

Main Methods:

• Retrospective review of pediatric imaging studies.
• Analysis of radiographic and MRI findings.
• Comparison with clinical data and follow-up.

Main Results:

• Metaphyseal defects are central, near the metaphyseal line, and asymptomatic.
• They differ from cortical defects in location.
• These defects resolve spontaneously with skeletal maturation.

Conclusions:

• Distal femur metaphyseal growth defects are normal variants of metaphyseal resorption.
• They are distinct from osteomyelitis and metastasis.
• No complications are associated with these benign findings.