Dual Venous Drainage for the Free Latissimus Dorsi Muscle Flap-Using the Serratus Vein Tributary-Making Virtue of a Necessity.

 Most flap failures in the lower limb are on account of venous congestion. Literature shows a decrease in the incidence of venous failure when two veins are anastomosed. The thoracodorsal pedicle of the latissimus dorsi free flap affords the possibility of a single venous anastomosis.