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  • Title: Diagnosis of cervical thymoma by fine needle aspiration biopsy with flow cytometry. A case report.
    Author: Ponder TB, Collins BT, Bee CS, Silverberg AB, Grosso LE, Dunphy CH.
    Journal: Acta Cytol; 2002; 46(6):1129-32. PubMed ID: 12462094.
    Abstract:
    BACKGROUND: Cervical thymoma is a rare entity. To our knowledge, this is the 20th reported case of cervical thymoma and the fourth case of fine needle aspiration biopsy (FNAB) of this entity. To our knowledge, this is the only case in which cervical thymoma was a diagnostic consideration at the time of the FNAB diagnosis. The diagnosis was rendered because, unlike in previous cases, flow cytometric immunophenotyping was performed. CASE: A 46-year-old, white female presented with what was clinically thought to be a left thyroid nodule. The patient underwent FNAB at an outside institution, and the diagnosis of "possible mixed lymphoma" was made by morphology alone. The patient was referred to our institution for repeat FNAB. Based upon the cytologic findings (cells with lymphoid morphology), flow cytometry was performed, and a diagnosis of cervical thymoma (versus ectopic thymic tissue) was based upon flow cytometry findings combined with morphology. CONCLUSION: When FNAB of a cervical mass, particularly one clinically thought to be a thyroid nodule, shows lymphoid cells without thyroid follicular cells, immunophenotyping may be extremely helpful in arriving at the correct diagnosis.
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