Fig. 4.

PET parameters according to the four subgroups based on the biomarker status of breast cancer. Each subgroup is defined as a) hormone receptor-positive and HER-2-negative, b) hormone receptor-positive and HER-2-positive; c) hormone receptor-negative and HER-2-positive; and d) hormone receptor- and HER-2-negative. There were no significant differences of PET parameters among these subgroups. Data are presented as box plots indicating median and interquartile range; whiskers extend to most extreme data points up to 1.5 times the interquartile range