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Definition English:
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A benign neoplasm of alveolar pneumocytes or ontogenetically primitive counterparts thereof. Morphological patterns that have been described include: solid, hemorrhagic, papillary, and sclerotic. Most lesions display a combination of two or three morphological patterns. Despite the implication by its name (HEMANGIOMA) of a vascular neoplasm, pulmonary sclerosing hemangioma is considered by most authorities to be an epithelial tumor. (Histopathology 2003;43(3):239-43; Arch Pathol Lab Med. 2001;125(10): 1335-9) |