Background and objective.

Trapezius muscles are anatomical targets for an athletic physique in men, and they are a good option in body contouring surgeries to aestheticize the male figure.

This study aimed to describe an effective and safe technique for trapezius muscle voluminization with autologous fat grafting.

Methods.

We describe our surgical technique and a total of 40 male patients were recruited between October 2020 and January 2021 to undergo body contouring surgery with trapezius fat grafting (FAT-TRAP). Measurements were taken before and immediately after the procedure. All the information was stored in a database and analyzed with SPSS version 25.

Results.

Patients aged 21 to 56 years (35.4 ± 8.63), with a body mass index (BMI) of 21.3 - 29.1 kg/m2 (24.7 ± 2.66). Intramuscular fat grafting of 40-100 cc (65.18 ± 17.59) was conducted using the FAT-TRAP technique. Ultrasonography immediately after the procedure showed a mean right trapezius muscle thickness variation of 18.15 mm, representing an increase of 97.66% (p<0.0001); mean left trapezius muscle thickness variation of 18.8 mm was obtained, representing an increase of 101.67% (p<0.0001) compared with the initial mean muscle thickness.

Conclusions.

Trapezius fat grafting (FAT-TRAP) is a safe technique for increasing intramuscular thickness. There were no adverse events during our study.

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