Where Does the Transplanted Fat is Located in the Gluteal Region? Research Letter.

[INTRODUCTION] Liposuction is one of the most popular plastic surgery procedures. As in any surgery, there are risks and complications, especially when combined with fat injection. Case reports of fat embolism have been reported. A possible explanation is the puncture and tearing of gluteal vessels during the procedure, especially when a deep injection is planned.

[OBJECTIVE] To identify the places where fat can be located after injection during a fat graft in the gluteus.

[METHODS] An experimental study was done in which colorant was injected in four directions using four different quadrants of the gluteus. We Injected 10 cc six times following clock hands until 60 cc were injected, and the cutaneous flap and the muscles were then elevated. Our main purpose was to describe where the colorant went and if it was in contact with the vessels (superior and inferior gluteal vessels). In total, four gluteus muscles were injected and dissected.

[RESULTS] Injection in the lower lateral quadrant was mainly into the muscle, and colorant was observed in the hypogastric vessels. The injection in the upper quadrants stayed mainly in the subcutaneous tissue.

[CONCLUSIONS] During surgery, it is important to identify the location of the perforators and to avoid a deep injection, especially from the lower lateral quadrant to the superior medial quadrant (Q4 to Q1), as the probability of puncturing and injecting fat into the main vessels from this direction is higher.