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Background
PD‐L1 immunoexpression in head and neck squamous‐cell carcinoma (HNSCC) determines immunotherapy eligibility. Patients are often diagnosed using fine‐needle aspiration (FNA) of metastatic lymph nodes, however, the cytohistologic correlation of the combined positive score (CPS) is largely unknown.
Methods
This study retrospectively identified 96 paired histologic (HS) and cytologic specimens...