RESUMEN
Objective To study the clinicopathological features,diagnosis and treatment of carcinoid tumors of the urinary bladder. Methods The clinical,histopathologic data of 4 carcinoid tumors of the urinary bladder were retrospectively analysed.The bladder carcinoid was diagnosed in 3 male patients and 1 female patient with age from 54 to 79 years.All patients were presented with gross hematuria,but with no clinical manifestations of the carcinoid syndrome such as flush,tachycardia,diarrhea.Cystoscopies showed 5 mm?5 mm to 25 mm?30 mm sessile polypoid masses. Results One patient received radical cystectomy followed by radiotherapy,3 patients received partial cystectomy.Two patients died of the tumor metastasis at survival interval 5 years and 3 months,respectively;other 2 patients were still alive 19 years and 8 months following the surgical treatment.Two cases were stage Ⅱ,and other 2 cases were stage Ⅲ.Histologically,tumor cells exhibited strong argyrophilia and electron microscopy revealed characteristic dense-core granules. Immunohistochemical testing showed the cancer cell was positive for chromogranin A and keratin. Conclusions Carcinoid of the urinary bladder is uncommon,the diagnosis depends on histopathological and immunohistochemical tests.Based on the degree of infiltration,size,location,lymph node metastasis,different surgical intervention can be choosed.