A method of treating ovarian cancer, prostate cancer, glioblastoma, or breast cancer in a patient comprising administering an anti-angiogenic agent to the patient in an amount sufficient to inhibit angiogenesis in the cancer, wherein the patient is known to overexpress at least one gene relative to a pre-defined cut-off threshold value which separates a particular disease into a first phenotype that indicates responsiveness to the anti-angiogenic agent and a second phenotype that indicates resistance to the anti-angiogenic agent, wherein the at least one gene is selected from the group consisting of GJB2, MMP13, GFPT2, BICC1, CDH11, MRVI1, PMP22, COL11Al, IGFL2, LUM, NTM, BGN, COL3A1, COL10A1, RAB31, ANGPTL2, PLAU, COL8A1, MIR1245, POLD2, NKD2, FZD1, COPZ2, ITGA5, VGLL3, MMP14, VCAN, THBS2, RUNX2, TIMP3, SFRP2, COL1A2, COL5A2, SERPINF1, KIF26B, TNFAIP6, MMP2, FN1, ALPK2, CTSK, LOXL1, and FAP in a sample of the cancer.