Inclusion Criteria: - Patients ≥18 years of age - Histologically confirmed malignancy that is metastatic or unresectable and for which standard curative or palliative measures do not exist or are no longer effective. For Cohort 8, malignancy will include only NET or RCC. - Karnofsky performance status of ≥70% - Patients with an adequate hematological profile - Patients with an adequate renal function - Males and Females of childbearing potential must utilize a standard contraception method - Ability to understand and the willingness to sign a written informed consent document. Exclusion Criteria: - Pregnant or breastfeeding patients - Patients, who suffered from an acute cardiac event within the last 12 months - Patients with active vascular disease, either myocardial or peripheral - Patients with proliferative and/or vascular retinopathy - Patients with known liver disease (alcoholic, drug/toxin induced, genetic, or autoimmune) - Patients with known CNS metastatic disease - Patients testing positive to one of the following viruses: HIV, HBV or HCV - Patients receiving chemotherapy or radiotherapy within the last 4 weeks before enrolment - Patients that have undergone major surgery within the last 4 weeks before enrolment - Patients may not have received anti-angiogenic therapy within the previous 8 weeks before enrolment. - Patients may not have received any other investigational agent within 4 weeks before enrolment. - Patients with an ongoing requirement for an immunosuppressive treatment, including the use of glucocorticoids or cyclosporin, or with a history of chronic use of any such medication within the last 4 weeks before enrolment - Uncontrolled intercurrent illness including, but not limited to ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements