Diagnostic lymph node extirpation in CUP syndrome - useful or damaging?

Acta Oto-laryngologica
Markus WirthMagdalena Wirth

Abstract

In a proportion of patients with cervical lymph node metastasis no primary can be found even with modern imaging and careful clinical examination (cancer of unknown primary syndrome = CUP syndrome). The ideal diagnostic approach is still debated on. The clinical data of 75 patients (median age: 61.8 years; 16 females and 59 males), which have been treated for cervical squamous cell carcinoma of unknown primary syndrome in our hospital were retrospectively analyzed. In 12% of patients (n = 9) the primary demarcated in a time period of up to 5.3 years after diagnosis. In the patients who did not receive adjuvant radiotherapy (n = 13), primary became apparent in 38%. Diagnostic lymph node extirpation delayed time until therapeutic neck dissection on average for 3 weeks. In 62% of patients with previous lymph node extirpation (pN2a-N2c), a modified radical neck dissection was required compared to 41% when the surgical site was not operated on. In 12% of patients' primary demarcated in the course of the disease. A diagnostic lymph node extirpation was compared to direct therapeutic neck dissection after frozen section analysis associated with a three weeks delayed therapy and higher rate of modified radical neck dissection.

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