Epithelioid @entity674 ( @entity674 ) may cause significant diagnostic @entity911 on fine-needle aspiration (FNA) with @entity189 , @entity5 , and @entity320 , particularly when metastatic. This study characterizes the cytologic features of nine cases of epithelioid @entity674 that were obtained by computerized tomographic guidance in five, by endoscopic ultrasound in three, and from an excised @entity96 in one. Six cases presented as @entity409 , one as a perisplenic mass, one as an abdominal mass, and one as a @entity356 . The aspirates revealed mainly single or small clusters of epithelioid cells with a moderate amount of granular to clear cytoplasm, small uniform nuclei with mild to marked nuclear envelope irregularities. Binucleation and intranuclear inclusions were frequent findings. Collagenous stroma was seen in most cases. In three cases, a @entity5 was the initial diagnosis. Immunocytochemical staining for @entity2467 ( @entity2467 ) was performed on cellblocks in six cases and was positive in five cases. On the subsequent surgical specimen, @entity2467 was positive in the @entity2467 -negative cytology case. The diagnosis of @entity677 should be considered in aspirates of the gastrointestinal tract, liver, mesentery, or abdominal wall mass lesions when epithelioid cells are the predominant cell type. Ancillary studies such as immunohistochemical stains are usually helpful in making a definitive diagnosis.

Epithelioid variant of XXXX : Diagnosis by fine-needle aspiration.

@entity677 :: ('MESH:C564650', 'Disease') :: ['GIST'] @entity96 :: ('MESH:D008113', 'Disease') :: ['liver tumor'] @entity5 :: ('MESH:D009369', 'Disease') :: ['neuroendocrine tumor', 'neuroendocrine tumors'] @entity409 :: ('MESH:D008107', 'Disease') :: ['liver masses'] @entity189 :: ('MESH:D002277', 'Disease') :: ['carcinomas'] @entity2467 :: ('3815', 'Gene') :: ['c-kit', 'CD117'] @entity911 :: ('MESH:D003221', 'Disease') :: ['confusion'] @entity356 :: ('MESH:D013274', 'Disease') :: ['gastric mass'] @entity674 :: ('MESH:D046152', 'Disease') :: ['GISTs', 'gastrointestinal stromal tumors'] @entity320 :: ('MESH:D008545', 'Disease') :: ['melanoma']
@entity674 :: (MESH:D046152,Disease) :: ['gastrointestinal stromal tumor']
