We divided the patients into two groups, patients with postoperative lymphedema (objective lymphedema) and those without (no lymphedema), and we examined correlations between age, BMI (25 ≤ BMI < 30 and BMI ≥ 30), histological findings (estrogen and progesterone receptor), and serum level of low-density lipoprotein cholesterol. Here, PGR is linked to lymphedema.