Authors: J. Laco 1; E. Šimáková 1; R. Slezák 2; L. Tuček 2 Authors‘ workplace: Fingerlandův ústav patologie a 2Stomatologická klinika Lékařská fakulta UK a Fakultní nemocnice, Hradec Králové 1 Published in: Čes.-slov. Patol., 43, 2007, No. 2, p. 68-72 Category: Original Article
A 62-year-old man was referred to the Department of Dentistry because of ultrasonographic finding of “cystoid lesion with relationship to right parotid gland“. During operation, a tumor mass without any relationship to parotid gland but attached to the right internal carotid artery was found. Grossly, the tumor was well circumscribed, spheric, measuring 40 mm in diameter; it was of solid, firm appearance and tan-to-white color on cross section. Microscopically, the tumor cells were round to spindle-shaped with vesicular nuclei and eosinophilic cytoplasm, arranged in fascicular pattern. Immunohistochemically, the cells expressed vimentin, CD 34, smooth muscle actin, and bcl-2 protein. On the basis of microscopical appearance and results of immunohistochemistry, the diagnosis of solitary fibrous tumor (cellular variant) was established. One year after resection, the patient is free of disease.
A new concept of this uncommon mesenchymal tumor is discussed.
Key words: neck – mesenchymal tumors – extrapleural solitary fibrous tumor –haemangiopericytoma
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