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False positive.
A 35-year-old female with NSCLC enrolled onto our study as HER2(−) based on pericardial effusion biopsy (HER2 2+; FISH ratio 1.22). The right upper lung lesion (the Target Lesion) is easily visualized (narrow arrows) on these fused SPECT/CT, SPECT, and low attenuation CT sagittal projections from the 71h post iv infusion of 128.4MBq[160.4ug] 111In-CHX-A”-DTPA trastuzumab imaging session. Tumor to Background Ratio is 6.7. The wider arrows show the liver.
