Figure 5b. Representative photomicrographs of immunofluorescent stained sections of tumors from (a) the control group, (b) the TNF treatment group, (c) the radiation treatment group, and (d) the combination therapy group. A decrease in antibody staining (yellow) is seen after treatment with either TNF or radiation therapy alone. A greater decrease in antibody staining is seen after combination therapy. (Original magnification, x200.)