The present invention relates to methods and compositions for the treatment and diagnosis of tumorigenic and/or angiogenic disorders, including, but not limited to, lung tumors, breast tumors, ovary tumors, colon tumors, hemangioma, and metastatic and angiogenic tumors. The invention further provides methods for identifying a compound capable of treating a tumorigenic and/or angiogenic disorder or modulating tumorigenesis and/or angiogenesis. The invention also provides methods for modulating tumorigenesis and/or angiogenesis, e.g., modulating tumorigenesis and/or angiogenesis in a subject. In addition, the invention provides a method for treating a subject having a tumorigenic and/or angiogenic disorder characterized by aberrant 32616 polypeptide activity or aberrant 32616 nucleic acid expression.