Esophageal inflammatory myofibroblastic tumor sampled by EUS-FNA.

摘要

A 39-year-old woman with renal failure scheduled for a transplantation presented with progressive dysphagia. She underwent EUS for evaluation of a subepithelial esopha-geal mass that had been identified by endoscopy. EUS revealed a 3.2 X 2.5-cm hypoechoic, circumscribed mass centered within the muscularis propria (Fig. 1). To exclude malignancy, the lesion was sampled by FNA. Cytologic preparations contained cellular fragments composed of haphazardly arranged, slightly atypical spindled cells admixed with numerous lymphocytes (Fig. 1). A cell block showed cellular fragments of spindled cells with occasional larger epithelioid cells. The cells were immunore-active with antibodies to smooth muscle actin and not with antibodies to desmin, S100 protein, CD34, and CD117 (c-kit). A diagnosis of "spindle cell proliferation, favor smooth muscle neoplasm" was rendered.