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Updated: Jun 8, 2026

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Published on: February 27, 2026
Pulmonary papillary adenoma
Motohisa Kuwahara1, Masako Nagafuchi, Toru Rikimaru
1Saiseikai Futsukaichi Hospital, Fukuoka, Japan. KHC03152@nifty.com
This case report details a rare solitary pulmonary papillary adenoma, a benign lung tumor. Surgical resection confirmed the diagnosis, highlighting the importance of vigilant monitoring for lung nodules.
Area of Science:
- Pulmonology
- Pathology
- Thoracic Surgery
Background:
- Solitary pulmonary papillary adenoma is an exceptionally rare benign lung neoplasm.
- Early detection and accurate diagnosis are crucial for effective management of lung nodules.
Observation:
- A patient presented with an abnormal chest X-ray, revealing an 11 mm nodule in the left lower lobe.
- The nodule, initially presumed to be an inflammatory granuloma, showed significant enlargement and lobulation over 4 years of observation.
Findings:
- Thoracoscopic partial resection was performed for the growing lung nodule.
- Postoperative pathology confirmed the diagnosis of pulmonary papillary adenoma, characterized by papillary epithelial cell growth.
Implications:
- This case underscores the diagnostic challenges and rarity of pulmonary papillary adenoma.
- Long-term surveillance is essential for lung nodules that exhibit changes, even if initially deemed benign.
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