Paraganglioma of a Bladder with a Bladder Stone

Paragangliomas of the urinary bladder are very rare tumors of the paraganglion system that arise from chromaffin cells in or near the sympathetic ganglia. Only approximately 15% of them develop from extra-adrenal chromaffin tissue. Most of these tumors are hormonally active and secrete mainly noradrenaline (rarely adrenaline), calcitonin, and adrenocorticotropic hormone. Paragangliomas are generally benign tumors, with less than 10% being malignant. Here we report a case of a paraganglioma arising in a urinary bladder with a bladder stone.