Figure 2. The patient (Patient 2) was diagnosed with triple-negative breast cancer that was clinically node-negative. Sentinel node biopsy (SNB) was performed initially, followed by chemotherapy. However, the tumor progressed rapidly, so the treatment was changed to surgery. Lymphoscintigraphy and single-photon emission computed tomography (SPECT/CT) showed no second sentinel node (SN). The front and oblique views of planar images (A, B, respectively). SPECT/CT images (C, D). Images taken at 15 min after 99mTc-phytate injection (A, C) and at 3 h (B, D). Accumulation observed only at the isotope injection point.