2. You buttock's structural anatomy is also an important factor. A V-shaped buttock typically requires more fat transfer to achieve a satisfactory improvement than an A-shaped buttock. Transferred fat cells need to grow their own blood supply from the surrounding buttock tissues in order to survive. In order for this to happen, the transferred fat cells need to be gently interwoven between your buttocks' living cells to survive. Therefore, each person's buttocks can only receive a certain amount of fat, and exceeding that amount will not be effective. A generous amount of fat is typically transferred at the time of surgery, knowing that some of the fat will go away during the recovery period.
The FDA has identified that breast implants may be associated with a rare form of cancer called anaplastic large-cell lymphoma, believed to be associated with chronic bacterial inflammation. Similar ALCL phenomena have been seen with other types of medical implants including vascular access ports, orthopedic hip implants, and jaw (TMJ) implants. As of February 1, 2017, the FDA has received a total of 359 medical device reports of breast-implant-associated ALCL (BIALCL), including 9 deaths. Most cases of breast implant-associated ALCL had implants in for many years prior to the condition, and are usually treated successfully by simple removal of the implant and the capsule surrounding the implant without the need for chemotherapy if no evidence of systemic disease exists. If women with implants present with delayed swelling or fluid collection, cytologic studies and test for a marker "CD30" are suggested. The American Society of Plastic Surgery (ASPS) states, "CD30 is the main diagnostic test that must be performed on the seroma fluid as routine pathology or H&E staining can frequently miss the diagnosis."  Diagnosis and treatment of breast implant associated ALCL now follows standardized guidelines established by the National Comprehensive Cancer Network.