case_images: PMC1190163_01
case_images: Composite figure of carcinoid tumor of urinary bladder. A) a glandular arrangement of tumor cells is evident. B) normal urothelium lined the tumor. A von Brunn nest entrapped by the tumor is seen. C-D-E) diffusely positive synaptophysin, chromogranin, and calcitonin immunostaining of tumor cells, respectively. F) urothelium and tumor cells strongly reacted with keratin 7.
case_images: 1471-2407-5-88-1.jpg
case_images: PMC1190163_01_1471-2407-5-88-1.jpg
case_images: F1
case_images: The tumor filled-up the lamina propria showing a predominantly glandular arrangement (Fig 1A), with scanty anastomosing cords of cuboidal cells with fairly regular nuclei. Foci of von Brunn nests were seen at the periphery near the urothelium (Fig 1B).