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(A) Coregistered axial 18F-FACBC PET/CT image demonstrates focal uptake in known left breast carcinoma (arrow), but uptake in breast tissue is less than blood pool. (B) Coregistered sagittal 18F-FACBC PET/CT image shows focal uptake in tubulovillous adenoma (arrow) with atypia, a premalignant tumor, detected incidentally on 18F-FACBC.
