Head and Neck Myxoma Presenting as Isolated Laryngeal Polyp

Figure 1

Histopathology. (a–c) A polypoidal lesion lined by hyperplastic stratified squamous epithelium. Subepithelium shows a paucicellular mesenchymal tumour comprising small, bland, spindle, or stellate-shaped cells with small and hyperchromatic nuclei and inconspicuous cytoplasm dispersed in an abundant myxoid stroma. Cellular pleomorphism, mitotic figures, and necrosis are absent. (e–f) Results of immunohistochemistry with CD34, SMA, and S-100. The tumour cells are immunonegative for CD34, smooth muscle actin (SMA), and S100 ((a) HE 40x, (b) HE 100x, (c) HE 200x, (d) CD34 200x, (e) SMA 200x, and (f) S100 200x).

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