(137) Surgical Outcomes at a Single Institution of Infrapubic insertion of Malleable Penile Prosthesis in Transmen after Phalloplasty

Abstract Introduction Penile reconstruction has allowed transmasculine individuals to attain the aesthetic appearance of male genitalia, however a penile prosthesis is needed to achieve the ridigity and bulk for penetration. High complication rates have been reported with penile prosthesis placement after phalloplasty, with the rate of reoperation exceeding 40% following both inflatable penile prosthesis (IPP) and malleable penile prosthesis (MPP). We describe the experience of a single surgeon with the infrapubic approach for MPP placement after phalloplasty. Objective To review the surgical outcomes of the infrapubic approach to the insertion of the MPP after phalloplasty in transgender men. Methods The infrapubic prosthesis insertion after phalloplasty technique involves a horizontal incision anterior to the pubic symphysis, which allows dissection of the neophallus channel and the anchor site on the pubic symphysis. Surgical outcomes using the Spectra (Boston Scientific, Marlborough, MA) and Genesis (Coloplast, Minneapolis, MN) MPP were analyzed between October 2017 and May 2022. Complications were reviewed and categorized into erosions, infections, device malposition and malfunction, and less common events like necrosis. Results The infrapubic MPP technique was performed on 40 patients by a single surgeon; 35 patients had a prior radial forearm free flap (RFFF) phalloplasty, and 5 had a prior anterolateral thigh flap (ALT) phalloplasty. Of the 30 patients who have continued to follow-up, mean follow-up was 34.9 months. Complications were not mutually exclusive, with 7 implant detachments from the anchor site, 3 malpositions, 2 with pain/activity limitation, and 1 infection. Surgical revision was required in 12 patients (40.0%). There were no neophallus erosions, flap loss, seromas, nor urethral injuries. More complications occurred with the Spectra MPP (9/17 or 52.9%) compared to the Genesis MPP (3/13 or 23.1%). Conclusions Infrapubic MPP insertion in transmen after phalloplasty is associated with high prosthetic surgical revision rates. Fewer complications were identified in the Genesis cohort. Longer term studies with patient reported outcome measures are required for further evaluation. Disclosure No