Distally Based Medial Hemisoleus Muscle Flap for reconstruction of distal and middle third leg defects.

Abstract

Background: Coverage of distal leg defects is quite challenging. Usually, free tissue transfer is used for the reconstruction of such defects. Lack of microsurgical team/setup or patient contraindication to undergo a lengthy procedure would divert the decision to local tissues for coverage typically using local fasciocutaneous/propeller flaps or muscle flaps. Also, those local flaps options would be the first choice for relatively small defects, with plenty of healthy tissue available for coverage. If a local fasciocutaneous flap is not feasible or desired, the distally based medial hemisoleus flap is a common reliable alternative for reconstruction of middle and/or distal third leg defects of small to moderate size. In the current series, relatively larger defects were successfully reconstructed using this flap. Intraoperative confirmation of the adequacy of the explored flap distal pedicle underly the reported high flap survival rate. PATIENTS AND METHODS: The study enrolled 13 cases (12 male & 1 female) with distal and/or middle third leg defects. Patients' age ranged from 12–51 years age (mean 37 years), with defect sizes ranging from 3.5x5cm (17.5cm2) to 8x10cm (80cm2) with a mean of 41cm2. Distally based medial hemisoleus flap was used to reconstruct all cases, based on its distal pedicle(s) from the posterior tibial vessels. A split thickness skin graft was used to cover the muscle typically one week later in a second procedure. RESULTS: All flaps survived completely except partial-thickness surficial flap necrosis in one case. This was conservatively managed by debridement and later skin grafting. All cases achieved complete healing of their wounds with successful limb salvage. CONCLUSIONS: Intraoperative confirmation of distal medial hemisoleus flap pedicle would ensure better flap survival and would allow safe reconstruction of moderately large distal leg defects in selected cases with appropriate distal pedicle size and location.