[Extrapleural solitary fibrous tumor mimicking lateral neck cyst--a case report].
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.
Laco
J
J
Fingerlandfův ustav patologie, Lékarská fakulta UK a Fakultní nemocnice, Hradec Králové. lacoj@lfhk.cuni.cz
Simáková
E
E
Slezák
R
R
Tucek
L
L
D003560:Cysts / Q000175:diagnosis; D003937:Diagnosis, Differential; D005350:Fibroma / Q000473:pathology*; D006258:Head and Neck Neoplasms / Q000473:pathology*; D006393:Hemangiopericytoma / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009333:Neck