Figure 2From: A mixture of carcinoid tumors, extensive neuroendocrine proliferation, and multiple pulmonary sclerosing hemangiomasHistologic and immunohistochemistry findings of pulmonary sclerosing hemangioma (PSH). (A) Multi-nodular PSH, with fibrous septae dividing different nodules. (B) Various histologic patterns of PSH (papillary, sclerotic, solid and hemorrhagic) (H&E stain, original magnification, (A) × 20, (B) × 40). (C) Characteristic immunostaining profile of PSH, both surface cells and round stromal cells are positive for epithelial marker epithelial membrane antigen (left panel) and thyroid transcription factor-1 (right panel), but only surface cells are positive for pancytokeratin (another epithelial marker) (middle panel) (Polymer method; original magnification, ×100).Back to article page