Management of Saddle-Nose Deformity in ANCA-Associated Vasculitis
For patients with GPA in remission who have saddle-nose deformity, reconstructive surgery should be performed after achieving sustained remission, by an otolaryngologist with expertise in treating GPA. 1
Initial Management: Achieve Disease Remission First
The priority is controlling active vasculitis before considering any reconstructive surgery. Saddle-nose deformity results from cartilaginous destruction due to granulomatous inflammation, and attempting reconstruction during active disease leads to graft failure and complications. 2, 3
Induction Therapy for Active Disease
- Rituximab 375 mg/m² weekly for 4 weeks plus high-dose glucocorticoids is the preferred first-line treatment for severe GPA 1, 4
- Alternative: Cyclophosphamide 2 mg/kg/day (adjusted for renal function) plus high-dose glucocorticoids 1, 5
- Use reduced-dose glucocorticoid regimens during the first 6 months to minimize toxicity 4
- Mandatory Pneumocystis jirovecii prophylaxis for all patients receiving rituximab or cyclophosphamide 1, 5, 4
Maintenance Therapy After Remission
- Rituximab is preferred for maintenance therapy, especially in relapsing disease 6, 4
- Scheduled dosing: 500 mg × 2 at complete remission, then 500 mg at months 6,12, and 18 (MAINRITSAN protocol) 6
- Alternative: Azathioprine 1.5-2 mg/kg/day if rituximab unavailable or low baseline IgG 6
- Duration: 18 months to 4 years after achieving remission 6
- Continue low-dose glucocorticoids (5-7.5 mg/day) for 2 years, then taper by 1 mg every 2 months 6
Timing of Reconstructive Surgery
Surgery must be delayed until sustained remission is achieved. 1 The 2021 ACR/Vasculitis Foundation guidelines specifically state that reconstructive surgery should be performed "after a period of sustained remission." 1
Criteria Before Surgery:
- Clinical remission maintained for adequate duration (typically 12+ months based on clinical practice) 7
- No active inflammatory signs on examination or imaging 2
- Stable immunosuppressive regimen 7
- Do not base decisions on ANCA titers alone - use clinical symptoms with diagnostic studies 1
Surgical Reconstruction Approach
Optimal Technique:
- Single L-shaped strut graft using autologous tissue has superior outcomes compared to multiple individual grafts 3
- Split-calvarial bone appears to have slightly lower complication rates than costal cartilage 3
- Costal cartilage with soft tissue grafts is also effective when performed during remission 7
- Overall success rate: 84.1% with 20% complication rate 3
- Avoid non-autologous tissue - associated with increased graft failure 3
Surgical Outcomes:
- Six of 36 patients (17%) required revision surgery due to infection or GPA flare-ups in one series 7
- Risk of graft failure increases with: number of grafts used, non-autologous tissue, and active disease 3
- Patients report significant improvement in both breathing and appearance at 12 months post-surgery 7
Critical Pitfalls to Avoid
- Never perform reconstructive surgery during active disease - this leads to graft failure and complications 2, 3
- Do not use multiple individual grafts when a single L-shaped strut can be placed 3
- Avoid synthetic or non-autologous materials - higher failure rates 3
- Do not adjust immunosuppression based solely on ANCA titers - use clinical assessment 1
- Ensure adequate remission duration before surgery - premature reconstruction risks flare and graft loss 7
Monitoring During Maintenance
- Base treatment decisions on clinical symptoms combined with laboratory, imaging, and biopsy findings 1
- ANCA titer increases are only modestly informative and unreliable predictors of flares in individual patients 1
- Persistent ANCA positivity does not necessarily indicate need for continued immunosuppression 1