Sclerosing Pneumocytoma (Hemangioma)

Two intermixed patterns are present in this field. The solid pattern, characterized by sheets of epitheloid cells with moderate amount of pink cytoplasm and conspicuous nucleoli, is seen throughout the field. These cells may have focal nuclear atypia but mitotic activity is low. Focal atypia does not affect the benign behavior of these lesions. The interspersed foamy macrophages, chronic inflammatory cells and blood lakes demonstrated are features typical of the hemorrhagic pattern.