[Primary obstructive mega-ureter in adults].

43 adult patients with 54 primary obstructive megaureters were studied retrospectively. This diagnosis excludes infravesical obstruction, reflux or neurogenic disorders. 23 megaureters were leftsided, 9 rightsided and 11 bilateral. Main symptoms were flank pain, infection and hematuria. In 25 cases an operation was performed, 29 were treated conservatively. Operative treatment should be limited to well-defined complications such as deterioration of kidney function or recurrent infection to avoid discredit as merely cosmetic procedure.