Figure 2.

The distribution of the histology in marker-positive (either one or both of the tumor markers in serum or cerebrospinal fluid were positive) and marker-negative cases (both tumor markers were negative) is shown. About half (17 of 35, 49%) of the marker-positive cases did not demonstrate a malignant component on histopathological analysis. Twenty-two cases did not have both tumor markers checked; correspondingly, although the one level that was assessed was negative, these patients were not designated among the definitively marker-negative cases.