Table 3.
Table 3.
Differential diagnoses and screening tests.
| Diagnosis | Laboratory test |
|---|---|
| a Only assesses for 21-hydroxylase deficiency (most common form of CAH). | |
| b Degree of elevation helpful. | |
| TSH, thyroid stimulating hormone; CAH, congenital adrenal hyperplasia; DHEA-S, dehydroepiandrosterone-sulfate. | |
| Pregnancy | Pregnancy test |
| Hypothyroidism | TSH |
| Hyperprolactinemia | Prolactin |
| Late-onset CAH | 17-hydroxyprogesteronea |
| Ovarian tumor | Total testosteroneb |
| Hyperthecosis | Total testosterone |
| Adrenal tumor | DHEA-Sb |
| Cushingís syndrome | 24-hour urine free cortisol |
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