Fig. 1

Histological and immunohistochemical findings of composite intestinal adenoma-microcarcinoid. a Low power magnification shows adenomatous polyp with hardly recognizable microcarcinoid component (×40). Black arrows indicate microcarcinoid component. b High power magnification displays adenomatous glands and neuroendocrine cell nests in the lamina propria, which are connected to each other (×200). c Immunohistochemical staining for synaptophysin shows diffuse cytoplasmic reactivity in the microcarcinoid component (×200). d The microcarcinoid component is diffusely stained for chromogranin-A on immunostaining (×200)