Pulmonary Hilar Tumor: An Unusual Presentation of Sclerosing Hemangioma

Figure 2

Histopathological analysis. (a) The gross specimen of the pulmonary hilar tumor is brownish and well circumscribed. (b) Microscopically, it shows a well-defined tumor composed of two cell types with round stromal cells and surface cells arranged in papillary, sclerotic, solid, and hemorrhagic pattern. Round cells are small with centrally located round to oval bland nuclei. Cuboidal surface cells are morphologically resembling type II pneumocyte. Lymphoplasmacytic infiltrate, xanthoma cells, hemosiderin, and calcification are seen (H&E stain, ×200). (c) In high power view, papillary configuration is revealed, formed by cuboidal surface cells and round stromal cells (H&E stain, ×400). (d) Photomicrographs show EMA and (e) TTF-1 are positive for both surface cells and stromal cells. (f) Cytokeratin is positive for surface cells and negative for stromal cells. Taken together, sclerosing hemangioma is diagnosed.

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