Tuffier's Line L4 — FRCA Primary MCQ

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EasyAnatomyTuffier's Line L4FRCA Primary

Which structure marks the surface anatomy landmark for identifying the L4 vertebral level?

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Correct answer: A — A line connecting the highest points of the iliac crests (Tuffier's line)

Tuffier's line (the intercristal line connecting the highest points of the iliac crests) corresponds to approximately the L4 vertebral body or the L4/5 interspinous space. This is the standard landmark for identifying the site for lumbar puncture or spinal anaesthesia (below the conus medullaris at L1/2).

Reference: RCoA 2021 Primary FRCA Curriculum