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Lead exposure — USMLE Step 3 MCQ

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ModeratePediatrics (well-child, chronic management)Lead exposureUSMLE Step 3

A 2-year-old boy in a pre-1978 apartment has a venous blood lead level of 12 micrograms/dL on screening. He is asymptomatic and growing normally. Hemoglobin is 10.9 g/dL with microcytosis. The family reports peeling paint near windows. Which of the following is the most appropriate at this time?

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Correct answer: B — Environmental investigation, nutritional counselling, and repeat venous lead testing

Moderately elevated pediatric lead levels require exposure removal, public health/environmental measures, iron assessment, nutrition, and repeat testing; chelation is reserved for substantially higher levels.

Reference: CDC childhood lead poisoning prevention guidance