The Absolute Effect / Evidence / Nazzani et al. cN0 penile cancer DSNB cohort
Penile Cancer · Surgical Oncology · Nodal Staging

Nazzani et al. cN0 penile cancer DSNB cohort

Clinical question

In cN0 penile cancer, can DSNB guide selective treatment of occult nodal disease while reducing morbidity?

Trial context
Population
296 consecutive cN0 penile squamous-cell carcinoma patients
Intervention
Dynamic sentinel node biopsy-guided selective nodal dissection vs observation
Key endpoint
5-year cancer-specific survival
Time horizon / follow-up
5 years
Absolute Effect

What changes for patients?

After inverse-probability weighting, 5-year cancer-specific survival was 90% with DSNB-guided selective dissection vs 77% with observation, while 5-year inguinal relapse-free survival was 90% vs 73%. Because this is nonrandomized evidence, the absolute difference should not be interpreted as a causal NNT. The key benefit is more accurate staging with less morbidity than prophylactic radical ILND.

NNT: Not defensible as a causal NNT; observational evidence

Treatment burden / harm

Clavien grade 3 complications

NNH: Not applicable; severe complications were lower with DSNB

Relative effect

HR: Cancer death HR 0.29 after weighting

Retrospective cohort; treatment-selection bias possible

Clinical interpretation

The cohort supports DSNB-guided staging and selective lymph-node dissection in cN0 penile SCC, while the observational design limits causal survival inference.

Primary publication

← Return to The Absolute Effect

Current-practice context · reviewed 14 October 2026

Dynamic sentinel-node biopsy is a preferred groin-staging approach for appropriately selected cN0 penile SCC patients at experienced centres, particularly when occult nodal risk is not negligible. This is an observational cohort, so the survival association should not be interpreted as randomized proof of causality. Technique quality, pathological ultrastaging, tumour risk group and access to prompt completion lymphadenectomy are central to safe implementation.

Nazzani et al. cN0 penile cancer DSNB cohort primary/registry source ↗ · Current guideline guidance ↗