Lung AdenoCA : Unusual Solid Pattern
The alveolar septa can be clearly seen even at low magnification. The alveolar spaces are solidly filled with clusters of tumor cells. The patient was an elderly non-smoker. The diagnosis of pulmonary adenocarcinoma was confirmed with the help of strong positivity for TTF-1 and Napsin A. The tumor cells were negative for p63 and p40.