3. The patient's therapeutic plan must include a standard therapeutic monoclonal antibody (such as rituximab, cetuximab/panitumumab or trastuzumab) or an investigational monoclonal antibody) to be administered on a schedule such that a FNA biopsy can be done within one week prior, and/or peripheral blood drawn immediately prior to the first dose of the therapeutic mAb and immediately to 24-336 hours post dose. Patients not receiving any other anti- cancer or immunosuppressive (steroids) modality within that time frame are preferred, though use of such agents does not exclude them from the study.