This study is to assess the safety and tolerability of Cediranib (RECENTIN™, AZD2171)in combination with etoposide and cisplatin (EP) as first line treatment for lung cancer patients with extensive stage or metastatic disease for whom EP would be a standard therapy.

Inclusion Criteria:

• Cancer diagnosis and stage (histological or cytological confirmed extensive stage lung cancer, which EP would be considered a standard therapy, required at the time of diagnosis.)
• No prior chemotherapy or immunotherapy for advanced stage lung cancer (prior radiotherapy will be permitted if it is outside of the measurable field and greater than or equal to 2 weeks prior to entry to the study.)
• WHO performance status 0-2

Exclusion Criteria:

• Untreated unstable brain or meningeal metastases
• Patient with inappropriate laboratory tests values
• Inadequate bone marrow reserve.