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Table 2. Serum and Cerebrospinal Fluid Markers

Tumor Type  Beta-HCG  AFP 
AFP = alpha-fetoprotein; HCG = human chorionic gonadotropin; + = positive; - = negative; ± = equivocal; +++ = strongly positive; (±) equivocal, not diagnostic; (+) = positive, not diagnostic.
Choriocarcinoma+++-
Embryonal carcinoma++
Germinoma(±)-
Teratoma-(+)
Yolk sac tumor-+++