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[Injection of autologous fatty tissue in the bladder submucosa: experimental study in swine].

The results achieved by the use of inert materials via endoscopic injection for the treatment of urological pathologies have been disappointing. Furthermore, these materials are costly, carry the risk of migration and may not be tolerated locally. Autologous fatty tissue, however, is not costly and is tolerated better. The authors have conducted an experiment in the pig to evaluate the degree of resorption and persistence of autologous fat injected into the bladder submucosa. The results show that submucosal injection of autologous fat acts like an autograft and persists as mature fatty tissue. The degree of resorption and/or steatonecrosis is directly related to the amount injected; the smaller the amount used the better the results.