The authors report two cases of abdominal fibromatosis corresponding to Gar
dner's syndrome, causing hydronephrosis by extrinsic ureteric compression i
n young men in whom any form of surgical resection would have been in vain.
These cases of ureteric compression were treated endoscopically by placeme
nt of a double J ureteric stent associated with treatment by tamoxifen in o
ne case and sulindac in the other with apparent stabilization of the diseas
e. The two patients are regularly followed in the department with ureteric
stent replacement two to three times a year.