Pulmonary atypical adenomatous hyperplasiaAtypical adenomatous hyperplasia (AAH) is a hyperplastic lesion of the epithelial lining of pulmonary alveoli. TumorigenesisA multi-step carcinogenesis hypothesis suggests a progression from atypical adenomatous hyperplasia (AAH) through bronchioalveolar carcinoma (BAC) to invasive adenocarcinoma (AC), but to date this has not been formally demonstrated.[1] References
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