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Updated: Jun 12, 2026

$Pseudofracture: An Acute Peripheral Tissue Trauma Model$

Pseudofracture: An Acute Peripheral Tissue Trauma Model

Published on: April 18, 2011

C1 synchondrosisの「ベビー・ジェファーソン」骨折：3例の報告

Kyung Jin Park¹, Zaid Elsabbagh, Paul D Sponseller

¹Department of Orthopaedic Surgery, The Johns Hopkins School of Medicine, Baltimore, Maryland.

JBJS case connector

|February 8, 2026

要旨

Case:

We describe the clinical presentation, management, and outcomes of 3 patients, aged 1.5 to 4 years, with C1 synchondrosis ("Jefferson") fractures treated nonoperatively. Minimally widened anterior arch fractures were identified on computed tomography that were not visible on conventional radiographs. Serial imaging showed fracture healing in all patients at minimum 1-year follow-up.

Conclusion:

These cases highlight the susceptibility of preschool-aged children to "baby Jefferson" fractures through the anterior synchondroses, the importance of early computed tomography imaging when conventional radiographs are inconclusive, and the favorable outcomes of nonoperative treatment with cervical immobilization of stable, nondisplaced pediatric C1 fractures.

キーワード:

環軸関節椎骨骨端線, 頸椎外傷, 小児C1骨折

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