Bronchiolo-alveolar carcinoma with nodal metastases

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Abstract
A case of bronchiolo-alveolar carcinoma of the lung was studied by light microscopy and EM. Type II granular pneumocytes were seen in the lymph node metastases of the tumor, a finding not reported previously. The presence of these cells in metastatic foci indicates their neoplastic nature, and provides evidence that bronchiolo-alveolar carcinoma arises from type II cells.