Paragangliomas are rare neuroectodermal tumors originating from the parasympathetic nervous system. In this case report, a case of hormone-negative extra-adrenal paraganglioma located retroperitoneally is presented. A 50-year-old female patient was admitted to our clinic with right flank pain. No pathology including urine and blood catecholamine degradation products was detected in the laboratory examinations of the patient. Computed tomography revealed an iso-hypodense solid lesion of 80x50 mm in size, compressing the inferior vena cava and close to the lower part of the pancreas. Surgery was planned for mass resection. During dissection, a severe hypertensive attack occurred, which was controlled with phentolamine. After removal of the mass, blood pressure remained within normal limits in the intraoperative and postoperative periods. th The patient was discharged without complications on the 5 postoperative day.