Report frrom 2014 on calcification, oil cysts and inflammatory responses frrom fat grafting. Note the doctor says the inflammatory response (i.e. cancer causing s**t) and calcification (so f**k you if done to the face) can continue to happen for "several years" after the procedure. I dunno, been reading A LOT of stuff about this on the web lately:
"The cyst wall consisted of innermost and outermost fibrous layers and intermediate tissue that contained the regular adipose portion, a degenerated adipose portion, and a fibrous area. Eggshell-like macrocalcifications were seen in the inner surface. Numerous inflammatory cells, mainly MAC2/CD206 anti-inflammatory M2 macrophages, were observed in the degenerated adipose portion. Oil cysts with a longer history showed more calcifications in the innermost layer and a larger fibrous area adjacent to the degenerated fat portion than those with a shorter history. These histopathologic findings and clinical computed tomographic images revealed that oil cysts continued to be inflammatory and calcifications continued to develop over several years."