Overview
Duplicated collecting systems without obstruction refer to congenital anomalies where a kidney has two ureteric orifices draining into separate collecting systems without evidence of obstruction or functional impairment 12.Diagnosis
Imaging: Ultrasound, CT urography, or MRI to identify dual collecting systems 12.
Excretory urography: May show separate drainage patterns 2.
No specific laboratory tests: Routine blood tests and urinalysis typically normal unless complications arise 1.Management
Observation: Often managed conservatively with regular follow-up imaging to monitor for any changes 12.
Surgical intervention: Reserved for symptomatic cases or complications; specific techniques not detailed in provided abstracts 2.Special Populations
Pregnancy: No specific guidelines provided in abstracts; general principles of conservative management apply 1.
Pediatrics: Early detection and monitoring are crucial; surgical correction may be considered if complications develop 2.
Elderly: Conservative management favored due to increased surgical risks; individualized assessment recommended 1.
Comorbidities: Management tailored to comorbidities; no specific drug treatments mentioned for duplicated collecting systems alone 12.Key Recommendations
Routine micropuncture access is not necessary for percutaneous nephrostomy in duplicated collecting systems without obstruction; conventional large-bore needle approach may be preferred due to fewer needle passes and potentially shorter procedure duration (Evidence: Moderate) 1.
Regular imaging follow-up is essential to monitor for any development of obstruction or complications in duplicated collecting systems (Evidence: Expert opinion) 2.
Conservative management is typically sufficient for duplicated collecting systems without obstruction, reserving surgical intervention for symptomatic cases or complications (Evidence: Moderate) 12.References
1 Clark TW, Abraham RJ, Flemming BK. Is routine micropuncture access necessary for percutaneous nephrostomy? A randomized trial. Canadian Association of Radiologists journal = Journal l'Association canadienne des radiologistes 2002. link
2 Deliveliotis C, Sofras F, Picramenos D, Bellos C, Stavropoulos NJ, Becopoulos T. A rare case of gigantic calyx dilatation manifested as renal ectopia. International urology and nephrology 1995. link
3 Walker RD, Richard GA, Bueschen AJ, Retik AB. Pathophysiology and recoverability of function and structure in obstructed kidneys. The Urologic clinics of North America 1980. link