Safety and Efficacy of LAG525 Single Agent and in Combination With PDR001 in Patients With Advanced Malignancies.

Inclusion Criteria:

Phase I part:

- Patients with advanced/metastatic solid tumors, with measurable or non-measurable disease as determined by RECIST version 1.1, who have progressed despite standard therapy or are intolerant of standard therapy, or for whom no standard therapy exists

Phase II part:

Patients with advanced/metastatic solid tumors, with at least one measurable lesion as determined by RECIST version 1.1, who have had disease progression following their last prior therapy and fit into one of the following groups:
Group 1: NSCLC
Group 2: Melanoma
Group 3: Renal cancer
Group 4: Mesothelioma
Group 5: TNBC
Eastern Cooperative Oncology Group (ECOG) Performance Status ≤ 1
Patient must have a site of disease amenable to biopsy, and be a candidate for tumor biopsy.

Exclusion Criteria:

History of severe hypersensitivity reactions to study treatment ingredients or other mAbs
Active, known or suspected autoimmune disease
Active infection requiring systemic antibiotic therapy
HIV infection. Active hepatitis B virus (HBV) or hepatitis C virus (HCV) infection
Patients receiving chronic treatment with systemic steroid therapy, other than replacement-dose corticosteroids in the setting of adrenal insufficiency
Patients receiving systemic treatment with any immunosuppressive medication
Use of live vaccines against infectious disease within 4 weeks of initiation of study treatment
Systemic anti-cancer therapy within 2 weeks of the first dose of study treatment.
Presence of symptomatic central nervous system (CNS) metastases or CNS metastases that require local CNS-directed therapy or increasing doses of corticosteroids within the prior 2 weeks
History of drug-induced pneumonitis or current pneumonitis.