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ureterocele
A ureterocele is a congenital abnormality found in the ureter. In this condition called ureteroceles, the distal ureter balloons at its opening into the bladder, forming a sac-like pouch. It is most often associated with a duplicated collection system, where two ureters drain their respective kidney instead of one. Simple ureteroceles, where the condition involves only a single ureter, represents only twenty percent of cases. Ureteroceles affects one in 4,000 individuals, at least four-fifths of whom are female. Patients are frequently Caucasian.
Since the advent of the ultrasound, most ureteroceles are diagnosed prenatally. The pediatric and adult conditions are often found only through diagnostic imaging performed for reasons other than suspicious ureteroceles.
==Classification==
- Intravesical
- Confined within the bladder
- Ectopic
- Some part extends to the bladder neck or urethra
- Stenotic
- Intravesical ureterocele with a narrow opening
- Sphincteric
- Ectopic ureterocele with an orifice distal to the bladder neck
- Sphincterostenotic
- Orifice is both stenostic and distal to the bladder neck
- Cecoureterocele
- Ectopic ureterocele that extends into the urethra, but the orifice is in the bladder
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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