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  • Title: Fine-needle aspiration of dedifferentiated chondrosarcoma of the larynx.
    Author: Faquin WC, Pilch BZ, Keel SB, Cooper TL.
    Journal: Diagn Cytopathol; 2000 May; 22(5):288-92. PubMed ID: 10790235.
    Abstract:
    We present a case of dedifferentiated chondrosarcoma of the larynx in which the dedifferentiated component was initially diagnosed by fine-needle aspiration (FNA). The patient was a 74-yr-old man who presented with difficulty breathing and an anterior neck mass. A CT scan demonstrated a 4.5-cm cartilaginous lesion involving the left thyroid cartilage, with an anterior soft-tissue component. Nine years prior, the patient had an incomplete resection of a low-grade chondrosarcoma at the same site. FNA was performed on the current lesion, demonstrating a high-grade spindle-cell sarcoma with a storiform pattern. The cytomorphology together with immunocytochemistry and electron microscopy were diagnostic of malignant fibrous histiocytoma (MFH), and synthesis of the clinical, radiographic, and cytomorphologic features resulted in a diagnosis of dedifferentiated chondrosarcoma. The cytologic diagnosis was histologically confirmed by laryngectomy. Although rare, dedifferentiated chondrosarcoma should be included in the differential diagnosis of high-grade sarcomas of bone and cartilage assessed by FNA.
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