RND2 and medulloblastoma: Semaphorin (co-expression network, p<1.23×10−5) and dopamine (intersect analysis, p<0.02) signaling pathways were exclusively enriched in Group 4 medulloblastoma and connected via co-expressed genes, DPYSL4, RND2 and SNCAIP that are all part of the same network cluster (Fig. 4b,c).