Figure 3.

(A) Stereofluorescence image of Pc 4 distribution in a fresh, excised tumor section. The tumor was excised 1 hour after IT injection of 0.3 mg/kg Pc 4. The white circle bounds the ID tumor, and the bright regions outside of the circle correspond to the skin adjacent to the tumor, where Pc 4 concentrations were half that within the tumor. (B) A surface plot of pixel intensities from the tumor region of A. The Pc 4 fluorescence counts within the tumor ranged from approximately 300 to 1000.