Background
Case series from Johns Hopkins. Patients presenting with metastatic squamous cell carcinoma (SCC) in a cervical lymph node from an unknown primary, in whom the primary was identified in the tonsillectomy specimen — specifically cases where the primary was contralateral to the presenting node, or bilateral. Provided the oncologic rationale for routine bilateral (not unilateral) tonsillectomy in the unknown primary workup.
Interventions and follow up
Design: Retrospective series evaluating bilateral tonsillectomy as part of unknown primary SCC workup
Primary endpoint: Detection rate of contralateral occult primary
mFollow up: Not specified
Primary endpoint: Detection rate of contralateral occult primary
mFollow up: Not specified
Results
Key finding: contralateral spread of metastatic cancer from occult tonsil lesions approaches 10%
Implication: in these cases unilateral tonsillectomy would have missed the primary, leading to inadequate treatment planning
Implication: in these cases unilateral tonsillectomy would have missed the primary, leading to inadequate treatment planning
Adverse events
Tonsillectomy complications: pain, bleeding, infection
Overall: low morbidity
Overall: low morbidity
Conclusions
Because up to 10% of occult tonsillar primaries may have contralateral spread, bilateral tonsillectomy is recommended as a routine step in the workup of unknown primary SCC when palatine tonsils are intact. Unilateral tonsillectomy risks missing a contralateral primary.
Key Limitations
Small retrospective case series; single institution; selection bias. No denominator-based detection rate; predates HPV/p16 era and base-of-tongue mucosectomy.
Clinical Context
Underpins the ASCO/ESMO-aligned recommendation for bilateral tonsillectomy in the workup of cervical nodal SCC of unknown primary when tonsils are intact; complemented in the modern era by transoral base-of-tongue mucosectomy.