Abstract: Bladder paraganglioma is a rare neuroendocrine tumor,accounting for only 0.05% of all bladder tumors. This article reports the diagnosis and treatment of a 16-year-old male patient with acute hemorrhage secondary to a giant bladder paraganglioma (approximately 10 cm in maximum diameter). Preoperative imaging evaluation suggested locally advanced disease,and the patient subsequently received three cycles of neoadjuvant chemotherapy with temozolomide. He patient􀆳s blood tests revealed hemorrhagic shock. During the waiting period of surgery,hemostasis was successfully achieved through emergency transarterial embolization. Subsequently,the patient underwent emergency radical cystectomy combined with orthotopic ileal neobladder reconstruction under general anesthesia and recovered well after surgery. Postoperative pathological examination confirmed the diagnosis of bladder paraganglioma,with positive immunohistochemical staining for succinate dehydrogenase subunit B and a Ki-67 proliferation index of 3%. At the 6-week follow-up,the patient􀆳s blood pressure and endocrine parameters had returned to normal,with a satisfactory quality of life. This case demonstrates that a multidisciplinary team approach can effectively integrate expertise from various specialties to formulate comprehensive and systematic treatment plans,which is crucial for ensuring successful management of such complex cases.