neoplasm
• adults develop lung tumors with 100% penetrance
• neoplasms appear at 1 month resembling noninvasive bronchioalveolar carcinoma; at 3-5 months, visible tumor nodules are noted on the pleural surface with extensive proliferation, but preserving their bronchioalveolar growth pattern
• between 5 and 6 months, number of visible lesions on pleural surface increases from 3.2 to 8.3/mouse
• by 8 months, some lesions appear as whitish solid tumor masses characteristic of invasive cancer; such tumors replace large areas of lung parenchyma and show areas of necrosis
• tumor cells are tall columnar epithelial cells showing a mix of papillary, acinar, as well as bronchioalveolar growth patterns; there is prominent extracellular mucin secretion that causes destruction of alveolar septae
• alveolar and terminal bronchioles are lined with dysplastic epithelial cells with pleomorphic, enlarged ,irregular nuclei
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respiratory system
• adults develop lung tumors with 100% penetrance
• neoplasms appear at 1 month resembling noninvasive bronchioalveolar carcinoma; at 3-5 months, visible tumor nodules are noted on the pleural surface with extensive proliferation, but preserving their bronchioalveolar growth pattern
• between 5 and 6 months, number of visible lesions on pleural surface increases from 3.2 to 8.3/mouse
• by 8 months, some lesions appear as whitish solid tumor masses characteristic of invasive cancer; such tumors replace large areas of lung parenchyma and show areas of necrosis
• tumor cells are tall columnar epithelial cells showing a mix of papillary, acinar, as well as bronchioalveolar growth patterns; there is prominent extracellular mucin secretion that causes destruction of alveolar septae
• alveolar and terminal bronchioles are lined with dysplastic epithelial cells with pleomorphic, enlarged ,irregular nuclei
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