A lesion typical clinically and histologically of so-called “pulmonary sclerosing hemangioma” was removed from the right middle lobe of a 19-year-old girl. Electron microscopic study reveals that, rather than being composed primarily of vascular and histiocytic components, it is made up predominantly of epithelial elements and appears to arise from primitive respiratory epithelium.
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Hill et al. (1972) studied this question.
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