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Micrometastases from squamous cell carcinoma in neck dissection specimens
M W van den Brekel1, H V Stel, P van der Valk
1Department of Otorhinolaryngology, Head and Neck Surgery, Free University Hospital, Amsterdam, The Netherlands.
Summary
Routine deeper sectioning and antikeratin staining for detecting micrometastases in head and neck cancer lymph nodes are not recommended. The low yield of additional micrometastases does not justify the increased workload in clinical practice.
Area of Science:
- Oncology
- Pathology
- Head and Neck Surgery
Background:
- Head and neck squamous cell carcinomas frequently metastasize to cervical lymph nodes.
- The clinical significance of micrometastases remains uncertain, impacting treatment decisions.
Purpose of the Study:
- To evaluate the diagnostic yield of enhanced histopathological techniques for detecting micrometastases in lymph nodes from head and neck cancer patients.
- To assess the impact of micrometastasis detection on postoperative treatment strategies.
Main Methods:
- Routine histopathological examination of 92 tumor-positive neck dissection specimens.
- Deeper level sectioning of 600 histopathologically negative lymph nodes.
- Antikeratin immunostaining (AE1/AE3) on 739 histopathologically negative lymph nodes.
Main Results:
- Micrometastases were identified in 66 lymph nodes from 41 patients using routine examination.
- Deeper sectioning detected 7 additional micrometastases in 5 patients.
- Immunostaining revealed 4 micrometastases in 3 patients.
Conclusions:
- The detection of micrometastases influenced postoperative treatment in a small subset of patients (3/77).
- The additional yield of micrometastases via deeper sectioning and immunostaining is low.
- Current evidence does not support the routine use of these enhanced methods due to unknown prognostic significance and increased workload.