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Fat grafting to the buttock area is a relatively new procedure; the following are the most important adverse effects:

1-Asymmetry: Injection of fat must be done carefully and in a symmetric way (same volume on both sides)

2-Overcorrection, undercorrection: It is always safe to aim for a slight over correction in order to achieve a good result once the swelling is gone.

3-Hardening of the injected fat.

4-Adverse effects of liposuction.

5-General adverse effects e.g. infection, scar hypertrophy etc