NTRK2 and ependymal tumor: Next, we evaluated the expression patterns of ShcA isoforms as well as Ras and TrkB in all characterized tumors represented by the following groups: choroid plexus tumors, diffuse astrocytic and oligodendroglial tumors, embryonal tumors, ependymal tumors, and other astrocytic tumors (see Figure 10 and Supplementary Table S1).