A wide selection of fasciocutaneous and musculocutaneous flaps is available for the reconstruction and coverage of extensive soft-tissue defects in the pelvic area. 1,2 The sacrum and perineum can be particularly difficult in patients who have suffered tumor related tissue destruction followed by multimodal radiation therapy. 3 In some cases, the residual pelvic floor area is not suitable for skin grafts, instead requiring composite flaps for adequate wound closure. Occasionally, the defect size will preclude the use of adjacent regional flaps. In these cases, a free musculocutaneous flap will be the only eligible solution. 2 We describe a case of a 46-year-old man who presented with a longstanding history of gigantic condylomata acuminata of the anus and rectum. The histological examination of various biopsies showed that the patient had developed several foci of squamous cell carcinoma that required an abdominoperineal resection and radical débridements. The residual defect needed coverage by an extended free flap. A musculocutaneous free flap based on the lateral circumflex pedicle of the femoral artery including a large anterior skin island, fascia, rectus femoris, sartorius, and tensor fasciae latae muscle was successfully transferred to a temporary arteriovenous loop anastomosed to the femoral vessels.
CASE REPORTA 46-year-old man had been suffering from gigantic condylomata acuminata of the anus for several years. Biopsies showed evidence of a squamous cell carcinoma arising in the tumor. Radical resection of the rectum and the entire bilateral integument of the buttocks, including the gluteus maximus and medius muscles in addition to the ischial skin and prostate, followed by a left-sided U-loop colostomy, was performed by the colorectal surgeon (Fig. 1). Before soft-tissue reconstruction, the diverting colostomy was converted into a permanent left-sided colostomy.
Plastic Reconstructive ProcedureAs a result of multiple metastatic lesions of the squamous cell carcinoma in the wound bed, which were removed, it was decided to cover the soft-tissue defect with a composite tissue transfer followed by postoperative radiation brachytherapy of the local metastases.A free flap with a large skin island and appropriate muscle was considered the only suitable option for closure to withstand the adjuvant irradiation. Because no regional recipient vessels were available, an arteriovenous loop was designed anastomosing the proximally based saphenous vein of the right leg to the right femoral artery in an end-to-side fashion (Fig. 2). The loop was placed subcutaneously above the anterior superior iliac spine of the pelvis in proximity to the lateral margin of the sacral wound.The only conceivable flap to meet the requirements in this patient was a large musculocutaneous free flap of the left leg. This flap had been described previously only as a pedicled flap or so-called "mutton chop" flap.The dominant arterial pedicle supplying the rectus femoris muscle originated directly from the femoral artery, not, as usual, from ...