Grynfeltt triangle not bounded by: (A) 12th rib, (B) Paraspinal muscles, (C) Internal oblique muscle, (D) External oblique muscle
Answer is D. 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.