- Second Priority: availability of paraffin-embedded tumor (via biopsies or pleural effusions) at least 5 X 5 mm (3 X 3 mm for pleural effusions) cross-sectional tumor area, with no systemic anti-cancer therapy or radiation to all sites of evaluable disease between collection of the biopsy and entry into the study; the collection of the paraffin-embedded tissues may have taken place up to 12 months prior to enrollment in CASTLE.