Only in 1 cell was there found a gain of the chromosomal region 9p24.3–9p23, where PTPRD is located, which has been reported to act like a tumor suppressor gene in NB, in addition to other genes, indicated to be related to cancer (i.e., JAK2, RLN2, TYRP1) [43]. The gene discussed is JAK2; the disease is cancer.