A rare case of pulmonary papillary adenoma in old aged woman: a brief case report.

Pulmonary papillary adenoma may be an unusual neoplasm of the lung. Since 1980 when Spencer et al.1 first described two cases of papillary adenoma of the lung, 23 cases have been reported worldwide including one case in Korea.2-4 Its rarity and shared histologic features of both benign and malignant tumors demand special attention for diagnosis, especially on the intraoperative consultation.2 Herein, we report a case of papillary adenoma of the lung that histologically mimicked a carcinoid tumor and review the histologic findings with differential diagnoses.