Two reports including few patients treated with poly-chemotherapy or hematopoietic cell transplantation for medulloblastoma or posterior fossa ependymoma have shown AMH below normal range for age [75, 76], whereas our group could not demonstrate any decrease in serum AMH in a large series of patients with Acute Lymphoblastic Leukemia or Lymphoblastic Lymphoma who received poly-chemotherapy [77]. The gene discussed is AMH; the disease is medulloblastoma.