Inclusion Criteria:

For patients:

- All patients with benign or malignant tumors of the soft tissues, gastrointestinal
tract, and other intra-abdominal sites who will have or have had tissue, peritoneal,
pleural, cyst, urine, and/or other gastrointestinal fluid removed for therapeutic or
diagnostic purposes.

- Patients will be entered without preference for any particular racial/ethnic group.

- Patients may have received prior hormonal therapy, cytotoxic chemotherapy,
irradiation, immunotherapy or surgical therapy.

- Tissue and body fluid specimens must be a large enough quantity to allow routine
pathological analysis, with the research laboratory specimen removed from the
residual specimen which would otherwise be discarded.

Healthy Control Subjects:

- Any male or female with no concurrent malignancies (except for localized basal cell
or squamous cell skin cancer) within 5 years of enrollment.

- > or = to 18 years of age

- Any MSKCC employee will be allowed to participate as a healthy control, provided they
fulfill the above inclusion criteria and they enroll willfully and voluntarily

Exclusion Criteria:

Healthy Control Subjects:

- Attending physicians authorized to obtain informed consent may exercise discretion in
excluding individuals for appropriate medical or other (e.g. mentally impaired)
reasons.