Primary Pulmonary Epithelioid Hemangioendothelioma: A Rare Cause of PET-Negative Pulmonary Nodules
(a) Neoplastic nodule showing increased number of cells at the periphery with an eosinophilic stroma (H/E, 100x magnification). (b) The neoplastic cells are of polygonal shape and eosinophilic with round nuclei and uniform small to moderately sized nucleoli. (H/E, 200x magnification). (c) Immunoperoxidase staining for CD34 of the neoplastic cells (brown colour) (200x magnification). (d) Immunoperoxidase staining for CD31 of the neoplastic cells (brown colour) (200x magnification).