Fine Needle Aspiration Cytology of Solitary Fibrous Tumor of the Pleura - Report of a case misdiagnosed as adenocarcinoma of lung -

흉막에 발생한 고립 섬유성 종양의 세침흡인 세포학적 소견 - 폐의 선암종으로 오진한 1예 보고 -

Solitary fibrous tumor on the pleura is rare but should be included in the differential diagnosis on a peripheral pulmonary nodule. Cytologic features of solitary fibrous tumor of the pleura is not familar to the pathologist and may be misdiagnosed as malignancy. We report fine needle aspiration cytologic(FNAC) findings of a case of solitary fibrous tumor misdiagnosed as adenocarcinoma in a 48-year-old woman. The FNAC displayed a mixture of bland-looking spindle cells and clusters of epithelioid cells, which have hyperchromatic nuclei with prominent nucleoli. The helpful finding to distinguish It from other circumscribed benign and malignant lesions is the presence of fibromyxoid matrix admixed with blood vessels and thin collagen fibers. Familiarity with these features is essential to avoid misdiagnosis and overtreatment.