Presence of adenocarcinoma in air spaces of pulmonary alveoli in resected lung specimen (observable entity)
Presence of adenocarcinoma in air spaces of pulmonary alveoli in resected lung specimen
Presence of micropapillary clusters, solid nests or single cells of adenocarcinoma spreading beyond the edge of the neoplasm into the air spaces of the lung parenchyma which is an invasive characteristic of adenocarcinoma of the lung.
