Figure 1

A 76-year-old woman with left breast cancer. IR imaging reveals focal increased surface temperature (positive IR1 sign with dT = 1.5°C compared with the contralateral mirror image site; positive IR2 sign with dT = 2°C compared with the remaining breast tissue at the ipsilateral side), abnormal vascular pattern (IR3 signs including closed vascular pattern, and vascular completeness) (arrows) and asymmetric vascular pattern (IR5 sign), and subtle focal bulging with back heat (IR4 sign) in left lower breast (arrowheads). Surgical pathological finding revealed a 4 cm infiltrating ductal carcinoma.