Urology. Feb;11(2) Hemitrigone: renal agenesis or single ureteral ectopia. Rush WH Jr, Currie DP. Hemitrigone is pathognomonic of either renal. The trigone (a.k.a. vesical trigone) is a smooth triangular region of the internal urinary bladder formed by the two ureteric orifices and the internal urethral orifice. that ureteral muscle is important for formation of the trigone is the observation that ureter agenesis results in an abnormally shaped ipsolateral hemitrigone.

If the bud arises more caudally on the duct, the orifice of the ureteral bud becomes incorporated onto an elongated cornu of the hemitrigone. not be affected following the removal of the single ectopic ureter as the hemitrigone which is present in these cases is sufficient to ensure control. The opening of. bladder, the hemitrigone on the affected side is often underdeveloped and may be elevated from behind by the dilated ureter. In some cases, the dilated ureter.

patients with vesicoureteric reflux ( refluxing ureter) underwent endoscopic electrocoagulation in the hemitrigone in order to treat the. Note that in the developing embryo, the terminal segment of the Wolffian duct is absorbed into the cloaca to form the hemitrigone of the developing bladder. last case demonstrates an obvious papillary lesion on the left hemitrigone that was positive under BL as well (which was a high-grade Ta tumor). Additionally.