Feature Summary of Papillary Adenoma of the Lung.
•Exceedingly rare, benign peripheral lung tumor
•Predominantly in man with wide age range
•Circumscribed peripheral nodule
•Papillary, fibrovascular cores
•Single layer of bland lining epithelium
•Positive for TTF1 and cytokeratins
•Main differential diagnoses include alveolar adenoma, and adenocarcinoma
•Complete resection curative
