Multi-center, open-label, non-randomized Phase II study to evaluate the efficacy and safety of OSI-7904L in gastric and GEJ cancers. Those patients who do not derive clinical benefit after two cycles may be switched to a commonly used combination regimen.

Inclusion Criteria:

Documented locally advanced or metastatic adenocarcinoma of the stomach or gastroesophageal junction No prior chemotherapy for locally advanced or metastatic disease Adequate baseline bone marrow, hepatic and renal function Age >= 18 years At least one target lesion

Exclusion Criteria:

Active or uncontrolled infections or other serious illnesses or other medical conditions (eg, hepatitis, HIV, chronic alcohol abuse) Symptomatic brain metastases which are not stable