The hypothesis brings over of the efficiency of the treatment it will be accepted if a rate of objective response of at least 55 % is obtained, rejecting the efficiency of the treatment when the rate of response targets be lower than 35 %. In this case, considering an alpha error of 0.05 and 80 % power, 14 patients will be included in the first stage; the study would continue if more than 5 objective responses were found. The total number of patients to including in the study would be 44. The results will be significant if they find at least 20 objective responses.