Treatment of Fossa Navicularis Urethral Strictures
For first-time, uncomplicated fossa navicularis strictures, initial treatment with simple dilation or meatotomy is appropriate, but for recurrent strictures or those associated with lichen sclerosus, prior hypospadias repair, or failed endoscopic manipulation, urethroplasty should be offered as definitive treatment. 1
Initial Treatment Approach
First-Time Presentation
For patients presenting with their first uncomplicated stricture confined to the meatus or fossa navicularis, you may perform:
- Simple urethral dilation (with or without guidewire placement)
- Meatotomy
These endoscopic approaches are reasonable for initial management in straightforward cases 1.
When to Move Directly to Urethroplasty
You should offer urethroplasty immediately (bypassing endoscopic treatment) in patients with:
- Previous hypospadias repair
- Prior failed endoscopic manipulation
- Previous urethroplasty
- Lichen sclerosus (LS)
- Obliterated strictures 1
Definitive Treatment: Urethroplasty
Recurrent Strictures
Surgeons should offer urethroplasty to patients with recurrent meatal or fossa navicularis strictures (Moderate Recommendation; Evidence Level: Grade C) 1.
The rationale is clear: meatal and fossa navicularis strictures refractory to endoscopic procedures are unlikely to respond to further endoscopic treatments. Repeated endoscopic interventions may actually compromise future reconstructive success 1.
Urethroplasty Techniques
Modern approaches prioritize glans-sparing, single-stage techniques using buccal mucosa grafts:
Single-Stage Options:
Dorsal inlay buccal mucosa graft urethroplasty
- Can be performed transurethrally, avoiding glans splitting
- Success rates: 93.8% anatomic, 100% functional success 2
- Excellent cosmesis with preserved penile sensitivity
"Sliding-T" dorsal inlay technique
- Success rate: 92.4% at mean 29.6 months follow-up
- Particularly effective for lichen sclerosus cases (70.4% of series)
- Low complication rate (7.4%) 3
Ventral onlay glanuloplasty (VOG)
- Success rate: 90% at median 30 months
- Single-stage augmentation with buccal mucosa
- High patient satisfaction with cosmesis 4
Two-Stage Reconstruction:
Reserved for:
- Severe cases with extensive involvement
- Recurrent failures after single-stage attempts
- Extensive lichen sclerosus
- Obliterated strictures 5, 6
Critical Pitfalls to Avoid
Repeated endoscopic treatments: Patients who undergo multiple dilations or urethrotomies may have worse outcomes with subsequent urethroplasty. Counsel patients that choosing repeated endoscopic procedures over definitive reconstruction may compromise future success 1.
Missing lichen sclerosus: This inflammatory etiology fundamentally changes management—these patients need urethroplasty, not endoscopic treatment 1, 5.
Inadequate follow-up: Recurrences can occur; maintain surveillance with ability to pass 16-17 Fr flexible cystoscope as objective measure 2, 3.
Post-Procedure Management
After endoscopic treatment (dilation or DVIU):
- Remove urethral catheter within 24-72 hours (no benefit to longer catheterization) 1
- Consider self-catheterization in patients not candidates for urethroplasty to maintain temporary patency 1
Expected Outcomes
Urethroplasty outcomes consistently superior to endoscopic treatment:
- Single-stage urethroplasty success: 90-93% 2, 4, 3, 6
- Patient satisfaction: 94-96% 3, 6
- Minimal impact on erectile function (3.7% de novo ED) 3
- Excellent cosmetic results with modern glans-sparing techniques 2, 4
Algorithm Summary
First presentation + uncomplicated → Dilation or meatotomy
Recurrence OR high-risk features (LS, prior hypospadias, obliteration) → Urethroplasty (single-stage buccal mucosa graft preferred)
Severe/complex cases → Two-stage reconstruction or perineal urethrostomy for non-candidates
The evidence strongly supports moving to definitive reconstruction early rather than pursuing multiple failed endoscopic interventions that may compromise future surgical success.