[Papillary adenoma of type-II pneumocytes as a rare differential diagnosis of a solitary pulmonary nodule]

Pneumologie. 2007 Nov;61(11):697-9. doi: 10.1055/s-2007-980111. Epub 2007 Sep 20.
[Article in German]


The case of a 66-year-old, asymptomatic patient with a papillary adenoma of type-II pneumocytes is reported. Following the coincidental radiologic finding of a solitary pulmonary nodule, the diagnosis could be established in a bronchoscopically obtained endobronchial biopsy. A resection of the involved segments S8-10 on the left side was performed. Papillary adenoma of type-II pneumocytes is a rare tumor, whose origin is suspected in progenitor cells of the bronchioloalveolar epithelium with the potential to differentiate towards type-II pneumocytes and clara cells. The tumor is regarded as benign, however, a malignant potential is not excluded by some authors.

Publication types

  • Case Reports
  • English Abstract

MeSH terms

  • Adenoma / diagnosis*
  • Adenoma / pathology
  • Adenoma / surgery
  • Aged
  • Biopsy
  • Bronchoscopy
  • Diagnosis, Differential
  • Humans
  • Incidental Findings
  • Lung / pathology*
  • Lung Neoplasms / diagnosis*
  • Lung Neoplasms / pathology
  • Lung Neoplasms / surgery
  • Male
  • Pneumonectomy
  • Solitary Pulmonary Nodule / etiology*
  • Solitary Pulmonary Nodule / pathology
  • Solitary Pulmonary Nodule / surgery
  • Tomography, X-Ray Computed