Triangle of Petit Boundaries — FRCA Primary MCQ
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Correct answer: A — External oblique anteriorly and latissimus dorsi posteriorly and iliac crest inferiorly
The inferior lumbar triangle (of Petit) is bounded by external oblique anteriorly / latissimus dorsi posteriorly / iliac crest inferiorly. Its floor is internal oblique. It is a site of lumbar herniation and a landmark for TAP block approaches.
Reference: RCoA 2021 Primary FRCA Curriculum