Objectives: Nodular fasciitis (NF) is a self-limited, mass-forming, fibrous proliferation that can occur in the head and neck and may mimic malignancy. Fine-needle aspiration biopsy (FNAB) is a minimally invasive, rapid, accurate method of obtaining diagnostic material from head and neck masses. In this study, we verify the usefulness of FNAB in obtaining a definitive diagnosis of NF. Methods: Cases were identified from our laboratory information system. Cytology slides were reviewed to note morphologic features and confirm diagnoses. Clinical history was obtained to document the case presentations and outcomes. Results: All 9 cases were found to have clinical presentations and common distinguishing morphologic features consistent with NF. Two cases were excised surgically, and the remainder regressed spontaneously. There were no recurrences. Conclusions: FNAB can produce a definitive diagnosis of NF, providing an opportunity to avoid surgical excision in patients with a typical clinical presentation.

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