A Study of GSK2118436 in BRAF Mutant Metastatic Melanoma

Inclusion Criteria:

Must be at least 18 years of age
Must have histologically confirmed cutaneous metastatic melanoma (Stage IV) that is BRAF mutation-positive (V600 E/K) as determined via central testing with a BRAF mutation assay.
Is treatment naive or has received prior treatment for metastatic melanoma.
Must have measurable disease according to Response Evaluation Criteria in Solid Tumors (RECIST 1.1).
Women of child-bearing potential must have a negative pregnancy test within 14 days prior to the first dose of study treatment.
Women with reproductive potential must be willing to practice acceptable methods of birth control during the study and for up to 4 weeks after the last dose of study medication.
Men with reproductive potential must be willing to practice acceptable methods of birth control during the study and for up to 16 weeks after the last dose of study medication.
Must have Eastern Cooperative Oncology Group (ECOG) Performance Status of 0-1.
Adequate organ function.

Exclusion Criteria:

Previous treatment with a BRAF or MEK inhibitor.
Cancer therapy (chemotherapy with delayed toxicity, radiation therapy, immunotherapy, biologic therapy, or major surgery) within the last 3 weeks; chemotherapy regimens without delayed toxicity within the last 2 weeks; or use of any investigational anti-cancer or other drug within 28 days or 5 half-lives, whichever is longer, preceding the first dose of GSK2118436.
A history of known Human Immunodeficiency Virus (HIV), Hepatitis B Virus (HBV), or Hepatitis C Virus (HCV) infection.
History or evidence of brain metastases on MRI or head CT if MRI is not able to be performed.
History of other malignancy. Subjects who have been disease-free for 5 years, or subjects with a history of completely resected non-melanoma skin cancer or successfully treated in situ carcinoma are eligible.
Certain cardiac abnormalities.