A New Combined Technique for Neophallus Elongation and Girth Enhancement for Metoidioplasty (Barroso Procedure):...

Metoidioplasty is used in transmasculine gender-affirming surgery; however, limited neophallus length and girth remain significant challenges (1-4). We describe a combined technique using Total Corpora Mobilization (TCM) for elongation and a Martius flap for girth enhancement (5-9).

Fifteen transgender men underwent first-stage metoidioplasty with TCM and Martius flap between 2023 and 2026. The vestibular plate and urethra were mobilized, followed by circumferential clitoral degloving and suspensory ligament division. A pubic periosteal incision was made, and subperiosteal dissection was performed using bipolar cautery while preserving a portion of the periosteum attached to the corpora cavernosa. The urethra was further mobilized and the triangular ligament was divided, followed by lateral dissection of both corpora cavernosa and complete release from the crura. An oral mucosa graft was used to create the urethral plate. The preserved periosteum was fixed to the dorsal tunica albuginea, and a vascularized Martius flap harvested from the labia majora was secured over the corpora for girth augmentation. Scrotal flaps provided wound coverage.

The index patient achieved a neophallus length of 6.4 cm, representing a 1.9 cm gain over the preoperative stretched clitoral length. Median length gain was 3.7 cm, and mean circumference increase was 1.6 cm. Glans perfusion and tactile sensitivity were preserved in all patients, with no vascular or sensory complications recorded.

Combined TCM and Martius flap metoidioplasty is feasible and reproducible. By achieving corporal release beyond previously described techniques, TCM may meaningfully enhance neophallus projection while preserving perfusion and sensation. Larger cohorts and longer follow-up are required to confirm the durability and functional outcomes of this approach.