Correct!
4. 1 and 3

Based on the initial history and physical examination, a variety of laboratory and radiologic studies are indicated. Because the physical examination shows scleral icterus and jaundice, liver function testing (lactic dehydrogenase [LDH], alanine transaminase [ALT], aspartate aminotransferase [AST], alkaline phosphatase [ALP], and bilirubin) is indicated (Table 1).

There is no apparent indication for serum calcium or phosphorus at this time.

Based on the above, what additional laboratory testing should be obtained? (click on the correct answer to be directed to the third of eight pages)

1. Complete blood count
2. Reticulocyte count
3. Serum haptoglobin
4. 1 and 3
5. All of the above

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