case_images: PMC2828429_01
case_images: PMC2828429_02
case_images: Endobronchi tumor proliferation (HE x40).
case_images: 1757-1626-3-25-1.jpg
case_images: PMC2828429_02_1757-1626-3-25-1.jpg
case_images: F1
case_images: Histological findings revealed an endobronchial and submucosal tumor composed of a proliferation of small cells, with a predominantly whorled pattern (Fig 1, 2).
case_images: Small cells proliferation of plasmocytoid-type, in a whorled pattern. The nuclei showed dispersed chromatin with no mitotic activity (HE x400).
case_images: 1757-1626-3-25-2.jpg
case_images: PMC2828429_02_1757-1626-3-25-2.jpg
case_images: F2
case_images: Histological findings revealed an endobronchial and submucosal tumor composed of a proliferation of small cells, with a predominantly whorled pattern (Fig 1, 2). Most of the cells appeared as plasmocytoid-type (Fig 2). A clear cell changes were focally seen throughout the tumor (Fig 2).
case_images: Immunohistochemestry: Diffuse positivity for Actine smooth muscle.
case_images: 1757-1626-3-25-3.jpg
case_images: PMC2828429_02_1757-1626-3-25-3.jpg
case_images: F3
case_images: The tumor cells were not only positive for smooth muscle actin (Fig 3) and vimentine, but also for S100 protein (Fig 4).
case_images: Tumor cells positive to S100 protein.
case_images: 1757-1626-3-25-4.jpg
case_images: PMC2828429_02_1757-1626-3-25-4.jpg
case_images: F4
case_images: The tumor cells were not only positive for smooth muscle actin (Fig 3) and vimentine, but also for S100 protein (Fig 4).
case_images: Tumor cells negatives to cytokeratine.
case_images: 1757-1626-3-25-5.jpg
case_images: PMC2828429_02_1757-1626-3-25-5.jpg
case_images: F5
case_images: Tumor cells were negative for cytokeratine (Fig 5), neuroendocrine markers including chromogranine and synaptophysin as well as for epithelial membrane antigen, desmin, HMB45 and CD34.