Fine‐needle aspiration cytology of localized fibrous tumor of pleura

Fine‐needle aspiration (FNA) biopsy findings are presented in three cases of localized fibrous tumor of pleura (LFTP). Clinically, two of the tumors behaved benignly, although one showed frequent mitoses and foci of necrosis. The third tumor exhibited local aggressiveness as evidenced by rib destruction. Cytologically, these tumors exhibited a wide range of cellularity, composed mainly of small, bland oval to spindle cells with moderate numbers of stripped nuclei. Small bits of collagen were seen in the smears. In all cases, cell blocks were instrumental in making the diagnosis. Previous cytologic descriptions of the tumor are briefly reviewed and the cytologic differential diagnosis is discussed. The peripheral location of this uncommon tumor makes it an ideal target for FNA biopsy. © 1992 Wiley‐Liss, Inc.

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