Study highlights minimally invasive option for canine ureteral ectopia: full analysis

CURRENT FULL VERSION: A retrospective study newly highlighted in the Journal of Small Animal Practice suggests that a minimally invasive modified cystoscopic-guided scissor transection technique may expand the treatment toolkit for dogs with intramural ureteral ectopia. Based on the source abstract, 25 dogs undergoing the procedure had significant improvement in continence scores with low complication rates, supporting the technique as a viable alternative to laser ablation. (actavetscand.biomedcentral.com)

That finding lands in an area where treatment decisions are often shaped as much by equipment access and surgeon experience as by anatomy. Ureteral ectopia is a congenital abnormality and the most common cause of urinary incontinence in young dogs. Intramural ectopic ureters are the most common subtype, and published outcomes after correction have historically varied widely, with complete continence rates across surgical studies ranging from roughly 25% to 82%. (actavetscand.biomedcentral.com)

The new 25-dog report appears to build on earlier work describing cystoscopic-guided scissor transection as an alternative to laser ablation. In a 2022 JAVMA case series of eight incontinent female dogs with intramural ectopic ureters, six of seven dogs with follow-up improved immediately after the procedure. At last follow-up, three of seven were completely continent with scissor transection alone, three more were continent or markedly improved with added medication for urethral sphincter mechanism incompetence, and one ultimately required additional surgery and an artificial urethral sphincter to become fully continent. Complications in that earlier series were minor, with transient lower urinary tract signs reported in three dogs. (pubmed.ncbi.nlm.nih.gov)

The broader literature helps frame why this matters. A 2022 long-term follow-up study of 51 dogs found that continence outcomes after ectopic ureter correction remain variable and influenced by more than the ectopic ureter alone. A more recent review of minimally invasive techniques noted that laser ablation is commonly favored for intramural ectopia, while laparoscopic ureteroneocystostomy may be reserved for extramural cases or anatomy less suited to endoscopic correction. That same review also underscored that persistent or recurrent incontinence can reflect concurrent urethral sphincter mechanism incompetence, lower urinary tract infection, bladder or trigonal abnormalities, or incomplete correction, not just failure of the primary procedure. (actavetscand.biomedcentral.com)

There doesn't appear to be a separate press release or broad industry reaction available yet for this JSAP paper, but the expert direction in published reviews is fairly consistent: minimally invasive approaches are increasingly preferred where expertise and equipment exist. At the same time, authors in the field have been careful not to overstate results. Reviews repeatedly note that larger prospective comparative studies are still needed, especially to sort out which dogs are best served by laser ablation, scissor transection, laparoscopic correction, or multimodal management. That caution extends beyond ectopic ureters. In a recent Veterinary Surgery short case series, two dogs with small solitary ventral-to-apical bladder urothelial carcinomas underwent laparoscopic stapled partial cystectomy with intraoperative cystourethroscopy. Surgeons used cystoscopic transillumination and mucosal assessment to guide 1- to 3-cm gross margins, completed the resection with EndoGIA stapling cartridges, leak-tested the bladder cystoscopically, and reported no intraoperative or short-term complications; histopathology confirmed complete excision in both dogs. The authors suggested the closed cystectomy approach may help reduce peritoneal seeding risk, but explicitly called for more data and noted that feasibility for non-apical or non-ventral masses remains uncertain. (pmc.ncbi.nlm.nih.gov)

Why it matters: For general practitioners, internists, and soft tissue surgeons, the practical takeaway is that anatomic correction of an intramural ectopic ureter is often only one piece of continence management. This study may be especially relevant for referral centers that have cystoscopic capability but limited laser access, since prior evidence has explicitly positioned scissor transection as a useful alternative when laser technology isn't available. For pet parents, that could eventually mean more minimally invasive treatment pathways, shorter recovery, and lower procedural barriers at some hospitals, though referral case selection will still be critical. (pubmed.ncbi.nlm.nih.gov)

The study also fits a wider shift in veterinary surgery toward techniques that aim to reduce tissue trauma without compromising outcomes. In urinary tract surgery, that trend includes not only cystoscopic correction for ectopic ureters, but also laparoscopic and combined endoscopic approaches in oncology and reconstructive procedures. The two-dog bladder tumor report is a good example of that direction: intraoperative cystourethroscopy was used alongside laparoscopy to define margins and confirm closure in a closed partial cystectomy approach for selected non-trigonal lesions. Even so, the evidence base is still relatively small, and most reports remain retrospective or involve limited case numbers. (pmc.ncbi.nlm.nih.gov)

What to watch: The next step will be whether this 25-dog experience is followed by full-text publication details on case selection, complication definitions, follow-up duration, and adjunctive medication use, and whether future head-to-head studies compare modified scissor transection directly with laser ablation in similar patients. More broadly, as minimally invasive urinary procedures expand, clinicians will want better prospective data on where each technique fits—including which ectopic ureter cases are best managed endoscopically and which bladder tumor cases are appropriate for closed laparoscopic stapled partial cystectomy. (actavetscand.biomedcentral.com)