Infiltration tendency of internal mammary lymph nodes involvement in patients with breast cancer: anatomical characteristics and implications for target delineation

摘要

Schematic diagram of the IMN extending measurement. Green circle: internal mammary lymphadenopathy. Red dot: internal mammary vessel; Arrows: distance between internal mammary vessel and internal mammary lymph node in medial direction, dorsal direction and longest distance. Example of measurement in medial/lateral axis; Example of measurement in dorsal axis; Example of longest distance between tumor margin and internal mammary vessels