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Central hypothyroidism — RCPSC IM MCQ

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HardEndocrinologyCentral hypothyroidismRCPSC IM

A patient with chronic SIADH from small-cell lung cancer has sodium 124 mmol/L, no seizures or confusion, normal blood pressure and no need for urgent IV treatment. Which initial management principle is appropriate while the cause is treated?

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

Reveal the answer and explanation

Correct answer: DRestrict free water and review medications, intake and sodium trend

Explanation lettering: B = shown as A · C = shown as B · A = shown as C · E = shown as D · D = shown as E

E is correct for clinically stable chronic SIADH: management starts with fluid restriction and reassessment of contributing factors, with serial sodium monitoring. A is reserved for severe symptoms. B may worsen SIADH. C is used to control excessive correction. D is not a complete initial plan.

Reference: Emergency Care BC, Hyponatremia: https://emergencycarebc.ca/clinical_resource/clinical-summary/hyponatremia/