- Occur through defects in the lumbar muscles or the posterior fascia, below the 12th rib and above the iliac crest.
- Usually occur after surgery or trauma.
- Herniation may occur through the superior (Grynflett-Lesshaft) or, less commonly, the inferior (petit) lumbar triangle.
- Superior lumbar triangle is bordered by the internal oblique muscle anteriorly, the 12th rib superiorly, and the erector spinal muscle posteriorly.
- The inferior lumbar triangle is bordered by the external oblique muscle anteriorly, the iliac crest inferiorly, and the latissimus dorsi muscle posteriorly.
- Small bowel obstruction
- Incarceration: hernia cannot be reduced or pushed back manually
- Strangulation: ischemia caused by a compromised blood supply
 Imaging Findings
Patient #1: CT images demonstrate a right lumbar hernia
 See Also
 External Links
- Diego A. Aguirre, Agnes C. Santosa, Giovanna Casola, and Claude B. Sirlin. Abdominal Wall Hernias: Imaging Features, Complications, and Diagnostic Pitfalls at Multi–Detector Row CT. RadioGraphics 2005 25: 1501-1520.