1. Age >= 18 years old.
2. Histologically-confirmed primary uveal melanoma.
3. Definitive local treatment for primary tumor, including surgical resection
(enucleation) or radiation therapy (radioactive plaque or external proton beam).
4. High risk for distal recurrence defined as any of the following conditions: A)
Confirmed both monosomy 3 and 8q amplification; B) - Class II tumor.
5. Less than 6 months from the date that local treatment (surgical or radiation) of the
primary tumor was finalized.
6. Karnofsky performance status (PS) scores of 70 or greater.
7. If female, no pregnancy.
8. If of child-bearing potential (< one year post-menopausal), must agree to practice an
effective method of avoiding pregnancy (including oral or implanted contraceptives,
intrauterine device, condom, diaphragm with spermicidal, cervical cap, abstinence or
sterile sex partner) from the time informed consent is signed (women only) or the time
of initiation of sunitinib (men only); both men and women must agree to continue using
such precautions while receiving sunitinib or valproic acid and for 30 days after the
9. Adequate organ function that has been determined within 2 weeks prior to the study
entry, defined as:
- - Absolute neutrophil count (ANC) ≥ 1500/mm3, platelets ≥ 100,000/mm3, and
hemoglobin ≥ 8 g/dl.
- - Serum creatinine < 1.5 times upper limit of normal range (ULN) or creatinine
clearance ≥ 40 ml/min.
- - Serum bilirubin < 1.5 times ULN and serum albumin > 2.0 g/dl.
- - Adequate cardiac function (EF> 50%) based on MUGA scan.
1. Other malignancy within 5 years, except curatively treated non-melanomatous skin
cancer, curatively treated carcinoma in situ of the uterine cervix, or early stage
(stage I or IIa) prostate cancer.
2. Metastatic uveal melanoma.
3. History of severe allergic reaction to sunitinib or valproic acid; inability to
receive sunitinib or valproic acid.
4. Previous treatment with sunitinib or valproic acid for uveal melanoma.
5. Active treatment with valproic acid for non-oncological conditions, if this cannot be
safely switched to an alternative agent.
6. Active epilepsy or convulsive conditions that require continuous use of
7. Patients with known urea cycle disorders (i.e.: ornithine transcarbamylase
8. Severe cardiovascular disease within 6 months, including myocardial infarction,
severe/unstable angina, coronary/peripheral artery bypass graft, symptomatic
congestive heart failure, cerebro-vascular accident or transient ischemic attack,
pulmonary embolism, life threatening arrhythmias, uncontrollable hypertension or QT
9. History of active liver disease (i.e. cirrhosis, viral or autoimmune hepatitis, etc.).
10. Pregnancy or unwillingness to stop breast-feeding.
11. Prior myelosuppressive chemotherapy or other investigational drug therapy within the
last 6 months prior to initiation of sunitinib or valproic acid.
12. Current evidence of hematemesis, melena or gross hematuria.
13. History or presence of any significant bleeding disorders.
14. Concurrent use of a strong CYP3A4 inhibitor or inducer (refer to Section 7). These
medications should be discontinued or switched to a different medication with a weaker
CYP3A4 interaction prior to enrollment into the study. If patients need to continue
the same medication(s), they are excluded from the study.
15. Chronic usage of aspirin greater than 81 mg/day.
16. Unable to render informed consent and to follow protocol requirements.