Tissue blocks or slides must be sent if available, with exclusions; if tissue blocks or slides are unavailable, the study chair must be notified prior to study enrollmentXx_NEWLINE_xXFor patients enrolling on Part B: tissue blocks or slides must be sent; if tissue blocks or slides are unavailable, the Study Chair must be notified prior to enrollmentXx_NEWLINE_xXTissue blocks or slides must be sent for all patients; if tissue blocks or slides are unavailable, the study chair must be notified prior to enrollmentXx_NEWLINE_xXPart C: Archived paraffin-embedded tissue (20 unstained slides or a tumor block) from a prior resection must be available as a control for correlative studies; if tissue blocks or slides are unavailable, the study chair must be notified prior to enrollmentXx_NEWLINE_xXTissue blocks or slides must be sent; if tissue blocks or slides are unavailable, the study chair must be notified prior to enrollmentXx_NEWLINE_xXTissue blocks or slides must be sent if available; if tissue blocks or slides are unavailable, the study chair must be notified prior to study enrollmentXx_NEWLINE_xXArchival tissue of tumors (slides or blocks [blocks preferred]) must be available for analysis; If tissue is not available, patients willing to undergo a pre-treatment biopsy may enrollXx_NEWLINE_xXTissue blocks or slides must be sent for all patients; if tissue blocks or slides are unavailable, the study chair must be notified prior to enrollmentXx_NEWLINE_xX