Donor Site Defect Coverage of the Forearm with Dermal Substitute After Harvesting Radial Forearm Free Flap for Phalloplasty: Is MatriDerm® Worth the Effort?

Abstract

An aesthetically and functionally pleasing phalloplasty is most commonly performed by a free radial forearm flap. However, the problem with donor site morbidity on the forearm remains unsolved. The aim of this study was to evaluate if the use of a dermal template such as MatriDerm® on the donor site significantly decreases the incidence of complications based on the Clavien–Dindo classification, such as wound healing disorders and reoperation rate, and if it could shortens the duration of hospital stay. A case series analysis was conducted at our institution. A total of 21 patients divided into two groups undergoing the phallic construction after the Gottlieb and Levine design in a single center underwent the donor site defect coverage either by MatriDerm® and split-thickness skin graft from the thigh or by full-thickness skin graft from the groin area. The use of MatriDerm® and split-thickness skin graft showed to have a statistically significant impact on the rate of complications (p = 0.008). Complications that were treated conservatively as well as that require surgical revision were significantly lower in the MatriDerm® group than in the full-thickness skin graft group (p = 0.002). Complications occurred not only at the forearm but also at the groin, where the full-thickness skin graft was harvested. The large dimension of the free radial forearm flap used for phalloplasty resulted in a significant donor site morbidity, leading to wound healing disorders, reoperations, and extended length of hospital stay. Therefore, we consider the use of dermal templates such as MatriDerm® as worth the additional effort and costs in this patient collective.