Vulvar Cancer Management by Stage
For vulvar cancer management, treatment is dictated by stage: early-stage disease (Stage I and select Stage II) requires conservative surgical excision with tailored lymph node evaluation, locally advanced disease requires multimodality chemoradiation followed by surgical resection of residual disease, and distant metastatic disease requires systemic therapy with palliative intent. 1
Early-Stage Disease (Stage I and Select Stage II)
Stage IA (≤1 mm invasion)
- Perform simple partial vulvectomy only—no lymph node evaluation is needed due to negligible risk of nodal metastasis 1
- Observe after resection
- If final pathology reveals >1 mm invasion, proceed with additional surgery for lymph node assessment 1
Stage IB (>1 mm invasion) and Select Stage II
Treatment depends on tumor location relative to the vulvar midline:
Lateralized Lesions (≥2 cm from midline)
- Perform radical partial vulvectomy with 1-2 cm margins 1
- Conduct ipsilateral inguinofemoral lymph node (IFLN) evaluation via:
- Sentinel lymph node (SLN) biopsy (preferred if technically feasible), OR
- Ipsilateral IF lymphadenectomy if no sentinel nodes detected 1
- Surgical groin treatment is superior to primary groin radiation for lower recurrence rates, though radiation causes less morbidity 1
Central Lesions (anterior or posterior midline)
- Perform radical partial vulvectomy with 1-2 cm margins 1
- Conduct bilateral IFLN evaluation via:
- Bilateral SLN biopsy, OR
- Bilateral IF lymphadenectomy on sides where sentinel nodes not detected 1
Management of Positive Nodes
- For lateralized/near-midline tumors with unilateral SLN metastasis: treat ipsilateral groin with either IF lymphadenectomy OR radiation therapy 1
- For midline tumors with unilateral SLN metastasis: unilateral groin treatment acceptable only if contralateral groin has negative sentinel node or negative IF lymphadenectomy 1
- Adjuvant therapy decisions based on primary tumor risk factors and nodal pathology 1
Critical Pitfall: The shift from radical vulvectomy to conservative radical partial vulvectomy is evidence-based—retrospective data show no difference in recurrence or survival between approaches, but significantly reduced morbidity with conservative surgery 1
Locally Advanced Disease (Unresectable Stage III/IVA)
Historically, radical en bloc surgeries caused devastating morbidity without survival benefit; multimodality treatment is now standard 1
Primary Treatment Approach
- Administer concurrent chemoradiation as primary treatment 1
- Chemotherapy functions as radiosensitizer (borrowed from cervical/anal cancer protocols)
- High response rates documented in small cohorts for stage III/IVA disease 1
- Reassess after chemoradiation for surgical resection of residual disease 1
- This approach achieves organ preservation and reduces surgical morbidity compared to primary exenterative procedures 1
Key Consideration: Tumors fixed to vital organs/vessels rendering disease unresectable benefit most from this neoadjuvant approach, allowing subsequent resection that would otherwise be impossible 1
Distant Metastatic Disease (Beyond Pelvis)
- Systemic therapy with palliative intent
- Radiation therapy for symptomatic metastases
- Clinical trial enrollment strongly encouraged 1
Important Caveats
Surgical Margins: Strive for 1-2 cm margins when feasible—this is oncologically appropriate without requiring the historical radical approaches 1
Sentinel Node Criteria: SLN biopsy is safe and appropriate for tumors ≤4 cm, efficiently eliminating unnecessary groin dissections 2, 3
Primary Radiation Alone: May benefit patients unable to undergo surgery, but surgical groin treatment followed by tailored adjuvant radiation (if node-positive) remains preferred due to lower groin recurrence rates 1
Multidisciplinary Discussion: All vulvar cancer cases should have access to multidisciplinary cancer case conference 4
Referral Threshold: All women with invasive vulvar cancer (>1 mm invasion) should be referred to gynecologic oncology for surgical management and lymph node assessment 4