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Abstract
A 2×1.5 cm tumor was found at the left wall 2 cm above left ureteric orifice during cystoscopy. The patient then received a partial cystectomy under general anaesthesia. No other tumors or paraaortic lymph node enlargement were found. The post-operative period was uneventful and her blood pressure recovered to normal after operation (123/76 mmHg). Histological examination: small round cells showed a solid proliferation. The tumor cells were multilateral or round, full of hobby red Iraq graininess in the cytoplasm, a vacuole like nucleus and less nuclear disruption. There was a large number of capillary vessels in the mesenchyme. Immunohistochemical results showed that vimentin and keratin staining were negative. However, chromogranin A、synaptophysin and NSE were positive. Paraganglioma, pheochromocytoma or chromo-receptor tumors, originate from the paraganglion and have a high hereditary component. They usually occur in the neuroendocrine system from the
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