Ipilimumab and Nivolumab in Leptomeningeal Metastases

Inclusion Criteria

• Participants must have histologically or cytologically confirmed disease from any solid tumor
• Age ≥18 years.
• Eastern Cooperative Oncology Group (ECOG) performance status ≤2 (Karnofsky ≥60%)
• Life expectancy of greater than 3 weeks
• Participants must have normal organ and marrow function as defined below, all screening labs should be performed within 10 days of treatment initiation.

Adequate Organ Function Laboratory Values:

Unit key: mcL = microliter, ULN = upper limit normal

• Hematological
• Absolute neutrophil count (ANC) ≥1500 /mcL
• Platelets ≥100,000 / mcL
• Hemoglobin ≥9 g/dL or ≥5.6 mmol/L without transfusion or Erythropoietin (EPO) dependency (within 7 days of assessment)
• Renal
• Serum creatinine OR Measured or calculated creatinine clearance (GFR can also be used in place of creatinine or CrCl) ≤ Serum creatinine ≤ 1.5 x ULN or creatinine clearance (CrCl) ≥ 40 mL/min (if using the Cockcroft-Gault formula below):
• Female CrCl = (140 - age in years) x weight in kg x 0.85 72 x serum creatinine in mg/dL
• Male CrCl = (140 - age in years) x weight in kg x 1.00 72 x serum creatinine in mg/dL
• Hepatic
• Serum total bilirubin ≤ 1.5 X ULN OR Direct bilirubin ≤ ULN for subjects with total bilirubin levels > 1.5 ULN
• Aspartate transaminase (AST) and Alanine transaminase (ALT) ≤ 3 ULN OR ≤ 5 X ULN for subjects with liver metastases
• Albumin ≥ 2.5 mg/dL
• Coagulation
• International Normalized Ratio (INR) or Prothrombin Time (PT) ≤1.5 X ULN unless subject is receiving anticoagulant therapy as long as PT or PTT is within therapeutic range of intended use of anticoagulants
• Activated Partial Thromboplastin Time (aPTT) ≤1.5 X ULN unless subject is receiving anticoagulant therapy as long as PT or PTT is within therapeutic range of intended use of anticoagulants
• Creatinine clearance should be calculated per institutional standard.
• Women of childbearing potential (WOCBP) must use appropriate method(s) of contraception. WOCBP should use an adequate method to avoid pregnancy for 23 weeks (30 days plus the time required for Nivolumab to undergo five half-lives) after the last dose of investigational drug.
• Women of childbearing potential must have a negative serum or urine pregnancy test (minimum sensitivity 25 IU/L or equivalent units of HCG) within 24 hours prior to the start of Nivolumab
• Women must not be breastfeeding
• Men who are sexually active with WOCBP must use any contraceptive method with a failure rate of less than 1% per year. Men receiving nivolumab and who are sexually active with WOCBP will be instructed to adhere to contraception for a period of 31 weeks after the last dose of investigational product. Women who are not of childbearing potential, ie, who are postmenopausal or surgically sterile as well as azoospermic men do not require contraception
• Ability to understand and the willingness to sign a written informed consent document.
• Stable dose of dexamethasone 2 mg or less for 7 days prior to initiation of treatment
• Carcinomatous meningitis, as defined by positive cytology

Exclusion Criteria

• Participants who have had chemotherapy, targeted small molecule therapy or study therapy within 14 days of protocol treatment, or those who have not recovered (i.e., ≤ Grade 1 or at baseline) from adverse events due to agents administered more than 2 weeks earlier. Subjects with ≤ Grade 2 neuropathy are an exception to this criterion and may qualify for the study. If subject received major surgery, they must have recovered adequately from the toxicity and/or complications from the intervention prior to starting therapy.
• Participants who are receiving any other investigational agents.
• Patients should be excluded if they have an active, known or suspected autoimmune disease. Subjects are permitted to enroll if they have vitiligo, type I diabetes mellitus, residual hypothyroidism due to autoimmune condition only requiring hormone replacement, psoriasis not requiring syst