METHODS: Ovarian tissue was obtained from five women with a mean age of 27 years (20–33 years), different tumor entities (breast carcinoma [n = 2], B-cell lymphoma, melanoma, medulloblastoma) and AMH levels above 2 ng/mL (4.28 ng/mL ± 1.89). This evidence concerns the gene AMH and medulloblastoma.