After the state banned the use of polyacrylamide hydrogel (i.e., Omnidene or Ingelfahrer) injections for breast augmentation in 2006, a large number of patients with complications and overly worried patients have undergone removal surgery, but it is understood that there are still many patients who are still waiting and waiting after the injections, who are asymptomatic, who do not have any uncomfortable symptoms, whose shape and softness may still be satisfactory, and who have not experienced any complications. Do they need to be surgically removed? How should they be examined and the risks determined? What is the treatment response? This is a concern for many people. It is surprising to find that the intraoperative findings during the removal of injectables in asymptomatic patients are: changes in injectable properties, a large number of particles of varying thickness in the injectable, large tissue loss, thickening of the envelope, degeneration of the surrounding tissue, etc. Therefore, asymptomatic does not mean no internal changes, and asymptomatic does not mean asymptomatic forever. Indications that have been agreed upon for asymptomatic patients requiring surgical removal: 1. excessive psychological burden that affects life; 2. prior to pregnancy; 3. one additional item should be added at this time: MRI presentation. There are three categories seen in surgery: I: injected material is viscous, colorless or yellowish, transparent, resembling a gel, containing few granules, with a thicker envelope or interval; II: injected material is thinner, yellow, opaque, containing more and smaller granules, more uniform, resembling cornmeal porridge, with a thinner envelope; III: injected material is viscous, yellow, opaque, containing more and coarser granules, yellow or white, and may have large pieces of free tissue, similar to millet porridge, and the envelope can be thicker. Studies have shown that the injected material can significantly erode the surrounding tissue and cause tissue freeing, which is a high risk factor for complications such as infection. It has been found that the MRI findings can be divided into three categories, which correspond to those seen during surgery: Type I: T2 high signal with homogeneous signal; Type II: T2 high signal with heterogeneous signal; Type III: T2 mixed high signal with heterogeneous signal and patchy low signal shadows of varying sizes. Therefore, preoperative MRI examination can determine the changes of the injection and surrounding tissues, and an experienced professional doctor can decide whether the injection needs to be removed by surgery as soon as possible.