Fine needle aspiration cytology of XXXX .

@entity1 @entity1143 @entity5 @entity2615 @entity3620 @entity420
The results of fine needle aspiration (FNA) cytology in 19 cases of @entity3620 are presented. Adequate material for a diagnosis of @entity5 was obtained in 17 cases, and in 8 cases a specific diagnosis of @entity2615 could be made. In four other cases, the findings were either consistent with or suggestive of @entity2615 ; in four, accurate distinction from other @entity5 was not possible, and in two cases, @entity420 was suggested. The spectrum of cytologic findings ranged from @entity5 of purely epithelial appearance through more pleomorphic biphasic @entity5 . A combination of epithelial-like cell clusters, pavement-like sheets of epithelial cells with well-defined cell borders and prominent cell separation, dispersed angular cells with dense cytoplasm and some spindle-cell forms was the most specific cytologic pattern for @entity2615 . In four @entity5 , ultrastructural examination of aspirated material provided the additional evidence for a definitive diagnosis. The identification of hyaluronic acid within intracytoplasmic vacuoles, either in smears or in cell blocks, confirmed the diagnosis in three @entity5 . Only in one case, with a strong clinical background suggesting @entity2615 , was the cytologic preparation sufficient for diagnosis without ancillary diagnostic methods. FNA is of particular value in the diagnosis of @entity2615 in @entity1 who do not present with a @entity1143 . Obtaining material for cell block preparations, cytochemistry or ultrastructural study is generally necessary for definitive @entity5 typing.
