Fig. 4From: Paraganglioma of the urinary bladder initially diagnosed as gastrointestinal stromal tumor requiring combined resection of the rectum: a case reportPathological findings with histological and immunocytochemical staining. a The tumor, with the formation of nests and cords of cells delimited from each other by connective tissue and vascular septations (hematoxylin-eosin × 200). b Tumor cells positive for chromogranin A (× 200). c Tumor cells positive for CD56 (× 200). d Tumor cells positive for synaptophysin (× 200)Back to article page