The present disclosure is directed to antibodies binding to ELTDI. Plexin-B2, Spondin-1, fibulin-1, LINGO I or SLIT3 and methods of using such antibodies to treat and/or diagnose gliomas. Thus, in accordance with the present disclosure, there is provided a method of inhibiting a glioma cell comprising contacting said glioma cell with a first antibody or antibody fragment that binds immunologically to ELTDI, Plexin-B2, Spondin-1 or SLIT3. The method may further comprise contacting said glioma cell with a second anti-cancer agent or treatment.