Hosting 728 files, 2951 images, and 4 contributors.

Random Case

SMA Syndrome
Joseph Junewick, MD FACR
over 9 years ago
Enter A Workflow
Standard2   Academic2

Please choose a workflow. A standard workflow allows you to browse the repository with full case detail; the academic workflow allows you to browse the repository with limited case detail revealed. Double click on the images to launch image viewer.

ARSt Case Repository

Bilateral L3 Spondylolysis

Case Detail

Anatomy: Musculoskeletal
Joseph Junewick, MD FACR
Diagnostic Category: Trauma
Created: over 7 years ago
Updated: over 7 years ago
Tags: PEDS
Modality/Study Types: CT
Adobe32 PDF Imagej32 ImageJA


Teenager with back pain.

Case Images


Bilateral L3 Spondylolysis


CT – Axial and sagittal and coronal reformats show bilateral irregular linear defects in the posterior elements of L3.


Spondylolysis is a common defect of the par interarticularis, mostly occurring at L5 (90-95%). Defects may be congenital or related to hyperextension microfractures. Spondylolysis may heal by fibrous or osseous fusion although nonunion/pseudojoint formation also occur. Lumbar curvatures, muscle imbalance and ligamentous laxity contribute to spinal malalignment (spondylolisthesis) and worsening pain from foraminal and spinal nerve distortion, degenerative disc and facet disease.


Ulmer JL, Mathews VP, Elster AD, et al. Lumbar Spondylolysis without Spondylolisthesis: Recognition of Isolated Posterior Element Subluxation on Sagittal MR. AJNR (1995); 16:1393–1398.

Corporate Office: 616.363.7272, 3264 North Evergreen Drive, Grand Rapids, MI 49525

Spectrum Health Helen Devos Childrens Hospital GE HealthCare