539306.fig.001a
(a)
539306.fig.001b
(b)
539306.fig.001c
(c)
539306.fig.001d
(d)
Figure 1: Photomicrographs showing histological and immunohistochemical findings. (a) The tumour is composed of small-cells with round to fusiform shape, scanty cytoplasm with fine granular nuclear chromatin, absence of nucleoli, and with high mitotic activity (H & E; ×200). The tumour cells were immunohistochemically positive for (b) cluster of differentiation 56 glycoprotein, (c) synaptophysin (a neuroendocrine marker) (×200), and (d) CgA (×200).