In the enrichment analysis performed for the target genes expressed in common in neurons and sperm using Metascape, “MAPK signaling pathway” (log(q) = −5.99) was the most representative term (Figure 3a), followed by terms related to cancer, such as “MicroRNAs in cancer” (log(q) = −4.80), “Pathways affected in adenoid cystic carcinoma” (log(q) = −3.69), “Glioma” (log(q) = −2.45), and “Signaling by ALK in cancer” (log(q) = −2.45). This evidence concerns the gene ALK and central nervous system cancer.