Fig. 2
From: Optimal radiotherapy for patients with internal mammary lymph node metastasis from breast cancer
Disease-free survival according to the internal mammary lymph node size and radiation dose* to the internal mammary lymph node (a) In patients with the internal mammary lymph node size < 1.0 cm (n = 42). (b) In patients with the internal mammary lymph node size ≥1.0 cm (n = 42). *Radiation dose to the IMN was grouped as follows: 50 Gy–63.5 Gy, low-dose; and ≥ 63.6 Gy, high-dose