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Since 1980, 110 cases of lymphedema have been treated by microlymphaticovenous anastomosis. Of these 110 patients, 91 with obstructive lymphedema of lower limbs were reviewed. The immediate and long-term results have been very satisfactory. Excellent and good results were obtained in 79.1 percent. An average reduction in circumference of the affected limb of 6.4 cm and an average reduction of excess volume of 59.2 ± 29.5 percent (representing 703 ± 850 ml) were obtained. Subjective symptoms and objective signs were improved. Four patients (4.4 percent) showed poor results owing to severe fibrosis of neighboring tissue; no lymphatics could be located for anastomosis. As the authors gained experience with the operation over the last 3 years, they modified the operative procedure, the anastomotic technique, and the selection of collective lymphatics. The data obtained suggest that the quality of results is proportional to the number of anastomoses. In order to obtain the best results, the criteria for selection of patients and avoidance of postoperative relapse are discussed. Finally, a test for determination of the indications for microlymphatic surgery is described.