Case report details salvage option for recurrent perineal hernia

A new canine case report in Veterinary Sciences highlights a salvage surgery for one of the tougher problems in soft tissue surgery: recurrent bilateral perineal hernia complicated by bladder retroflexion after multiple failed procedures. In the reported case, an 11-year-old, 7.5 kg, castrated male Pomeranian had persistent urinary dysfunction despite prior perineal and abdominal operations, including an attempted cystopexy. The authors say they turned to a rectal wall vas deferens pexy because adhesions and distorted anatomy made standard revision difficult. Based on the report summary, the dog improved after surgery, positioning the technique as a potential fallback when conventional options are limited. (merckvetmanual.com)

That clinical context matters. Perineal hernia is most often seen in older male dogs and can present with constipation, tenesmus, dyschezia, and urinary signs. The situation becomes more urgent when the bladder retroflexes into the hernia, because urinary obstruction and compromised bladder blood supply can follow. Authoritative clinical references from Merck and ACVS both note that dogs with bladder entrapment may need emergency stabilization and surgery, and that recurrence remains a known complication even after repair. (merckvetmanual.com)

The broader surgical literature helps explain why a salvage technique would be worth reporting. Internal obturator muscle transposition is a standard repair, but recurrence is still reported. In one JAVMA retrospective series of 34 dogs, the one-year recurrence rate after internal obturator transposition was 27.4%, with median time to recurrence of 28 days. A 2022 Veterinary Surgery series of 23 dogs found recurrences were more common in dogs that had undergone previous herniorrhaphies, and recurrence rates were lowest in dogs without prior repair or organ pexy. In other words, once a dog enters the revision-surgery pathway, the anatomy and prognosis can get more complicated fast. (pubmed.ncbi.nlm.nih.gov)

The concept behind the new report is not entirely without precedent, but the adaptation appears unusual. ACVS notes that organopexies, including colopexy, cystopexy, and vas deferensopexy, are considered when organs have herniated or when disease is recurrent. Older literature also supports fixation of the deferent ducts to reduce retrodisplacement of the bladder and prostate in canine perineal hernia. What seems novel here is using a rectal wall vas deferens pexy in a salvage setting after failed bladder reduction and cystopexy, suggesting the surgeons used the vas deferens not just for cranial traction of pelvic organs, but also to help reestablish support around the rectum in a scarred field. That last point is an inference from the available abstract and background literature, not a direct quote from the full paper. (acvs.org)

Published experience supports the idea that adjunctive procedures can matter in complex cases. A 1999 case report of a female cocker spaniel with bilateral perineal hernias, marked rectal sacculation, and ventral bladder retroflexion described successful staged management with cystopexy and colopexy followed by bilateral herniorrhaphy, with no recurrence at 12 months. More recent reports and reviews also describe combining herniorrhaphy with abdominal pexy procedures, and semitendinosus muscle transposition has been positioned as a useful alternative when internal obturator repair alone is difficult, including in dogs with prior surgery. (pubmed.ncbi.nlm.nih.gov)

Why it matters: For veterinary professionals, the takeaway isn’t that rectal wall vas deferens pexy should become routine. It’s that this case expands the toolbox for revision patients in whom conventional anatomy has been lost to recurrence, fibrosis, or prior abdominal fixation. In practice, these are the dogs most likely to challenge surgical planning, referral timing, and pet parent expectations. The report also reinforces a familiar lesson: organ displacement, urinary dysfunction, and postoperative tenesmus are not side issues in perineal hernia cases, because they shape recurrence risk, urgency, and technique selection. (pubmed.ncbi.nlm.nih.gov)

For general practitioners and emergency teams, the case is also a reminder to treat bladder retroflexion as more than a mechanical oddity. Merck and ACVS both emphasize that inability to urinate, bladder entrapment, or strangulated bowel can turn perineal hernia into a true emergency. Early imaging, decompression when needed, and referral before repeated failed repairs may improve the odds of a cleaner first definitive surgery. (merckvetmanual.com)

What to watch: The next step is whether this technique appears in additional case reports or small series, ideally with longer follow-up and clearer selection criteria. If it does, surgeons will want to know where rectal wall vas deferens pexy fits relative to repeat cystopexy, mesh reinforcement, muscle transposition options, and single-stage abdominal-perineal revision strategies. For now, the evidence is limited to one case, but it’s the kind of workaround that may resonate in referral practice because it addresses a problem surgeons already know well. (pubmed.ncbi.nlm.nih.gov)