The retrograde-flow posterior interosseous flap is a locoregional septo-facio-cutaneous island flap vascularized retrogradely by the posterior interosseous artery of the forearm via a distal anastomosis with the anterior interosseous artery and the deep arch of the carpus. We reviewed 15 cases of loss of substance in the hand covered by posterior interosseous flap. We obtained 86.6% good functional results, with a satisfactory aesthetic outcome in...