T4 Nipple Dermatome — FRCA Primary MCQ
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Correct answer: A — T4
Key dermatome landmarks: C5 = lateral arm (regimental badge) / T4 = nipple line / T6 = xiphisternum / T10 = umbilicus / T12 = inguinal ligament / L1 = groin / L3 = knee / L5 = great toe web space / S1 = lateral foot / S2-S4 = perineum.
Reference: RCoA 2021 Primary FRCA Curriculum