Grynfeltt triangle not bounded by
Lumbar hernias- Hernias through the superior lumbar triangle (Grynfeltt triangle) are more common and bounded by the 12th rib, paraspinal muscles, and internal oblique muscle. Inferior Lumbar / Petit triangle- bounded by the iliac crest, latissimus dorsi muscle, and external oblique muscle.
12th rib
Paraspinal muscles
Internal oblique muscle
External oblique muscle
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