Our experience is described in the treatment of BPH by prostatic incision. Three hundred patients were treated from 1989 to 1993; 285 had obstructive BPH (48 in complete urine retention) and 15 had prostatic carcinoma. One hundred eighty-nine patients were controlled and in 93% the results were satisfactory for disappearance of symptoms. Insignificant complications were recorded and only 9% had retrograde ejaculation. Ninety-six urodynamic controls (flowmetry) were performed which showed a considerable improvement in maximum urinary flow rate. The operation was successful even in patients with large adenomas, with a considerable reduction of the Boyarsky score (mean from 17.8 to 3.8) six months postoperatively. In conclusion TUIP is a good procedure in BPH. It is an easy technique without important complications.