Figure 2.

A 49‐year‐old woman with newly diagnosed estrogen receptor‐positive breast cancer. (A): Axial ¹⁸F‐FDG positron emission tomography (PET) shows right axillary focal uptake (black thin arrow). (B): Axial computed tomography (CT) shows the right axillary lymph node on one level (white thin arrow). (C): At the same level, there is no focal uptake in the ¹⁸F‐FES PET. (D): ¹⁸F‐FES PET MIP showed breast mass uptake (black thick arrow) but no focal uptake in right axillary lymph node. The right axillary lymph node was not a metastasis as proven by pathology after operation.