Breast nodule 8-point position and 11-point position is used to describe the position of the nodule in the breast, which is conducive to the clinic to better find the location of the nodule, if it is a multiple nodule this way can avoid the description of confusion. In clinical practice, one side of the breast is generally regarded as a clock, and the breast is divided into 12 regions, each region corresponds to the number on the clock in a clockwise direction, and at the same time, the nipple is used as the center to divide the breast into four quadrants, which are the upper left quadrant, the lower left quadrant, the lower right quadrant, and the upper right quadrant, respectively. The 8 o’clock position means that the nodule is in the lower right quadrant of the breast, roughly at the 8 o’clock position, while the 11 o’clock position means that the nodule is in the upper right quadrant of the breast, roughly at the 11 o’clock position.