A review of the English-language literature showed only about 65 isolated cases of glial implants on the peritoneum associated with OT reported before 1994. The largest series of cases are from Robboy and Scully,1 5 cases; Norris et al,6 7; Nogales et al,7 4; Nielsen et al,11 4; and Harms and Janig,8 13. Others were isolated cases.2,4,5,9,10,12 Of the reported cases, some immature glial implants (grades 1, 2, or 3) or other teratomatous implants, or both, were found, either at the time of the first operation or within a short period thereafter. However, according to the 2 previously mentioned diagnostic criteria, such cases, instead of being diagnosed as GP, should have been diagnosed as metastatic teratoma that would require further aggressive therapy.12 With these considerations, only 45 of the cases are acceptable as GP. Of these 45 cases, the average age at the time of diagnosis was 15 years (range, 2-50 years); the average time of follow-up was 46 months (range, 6-120 months).