CD248 and neoplasm: Tumor uptake at 1 mg of total antibody injected was similar to the uptake obtained in HT-1080, endosialin/TEM-1-negative tumors injected with 25 μg of total antibody (average %IA/g = 4.18 ± 0.06 vs. 4.47 ± 0.09, respectively), indicating the specificity of [111In]CHX-DTPA-scFv78-Fc uptake for endosialin/TEM1 (Fig. 5c).