Figure 6From: Pheochromocytoma presenting as recurrent urinary tract infections : a case report (a) Low power (10X) image depicting nests of tumour cells with prominent intervening capillary network giving characteristic Zellballen appearance; (b) High power (20X) image highlighting the presence of abundant finely granular amphophilic cytoplasm, round nuclei, marked focal nuclear pleomorphism and tumor giant cells. These findings do not correlate with malignant behavior.Back to article page