Sacral Cornua Caudal Landmark — FRCA Primary MCQ

Instant feedback + full explanation. One question, done properly.

EasyAnatomySacral Cornua Caudal LandmarkFRCA Primary

Regarding the anatomy of the sacrum the sacral hiatus is located at the apex of the sacrum and is identified by palpating the:

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: A — Sacral cornua (two bony prominences flanking the hiatus)

The sacral cornua are two bony projections on either side of the sacral hiatus palpable as small prominences approximately 5 cm above the tip of the coccyx in the midline. The sacral hiatus is covered by the sacrococcygeal membrane/ligament. A 'pop' is felt as the needle penetrates this membrane during caudal epidural injection.

Reference: RCoA 2021 Primary FRCA Curriculum