Tumor Necrosis Factor in Patients Undergoing Surgery for Primary Cancer or Metastatic Cancer

RATIONALE: Biological therapies, such as tumor necrosis factor, may stimulate the immune system in different ways and stop tumor cells from growing. Studying tumor necrosis factor in samples of tumor tissue and healthy tissue from patients with cancer in the laboratory may help doctors learn how tumor necrosis factor works in tumor tissue and healthy tissue. PURPOSE: This clinical trial is studying tumor necrosis factor in patients undergoing surgery for primary cancer or metastatic cancer .