Lung nodule

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Author: Mikael Häggström [notes 1]

A lung nodule or pulmonary nodule is a relatively small focal density in the lung. This article deals with the presence a solitary pulmonary nodule (SPN) or coin lesion, which is a mass in the lung smaller than 3 centimeters in diameter.[1]


The content may be applied to the presence of a few solitary pulmonary nodules, each of which is defined as a single lesion in the lung completely surrounded by functional lung tissue with a diameter less than 3 cm, and without associated pneumonia, atelectasis (lung collapse) or lymphadenopathies.[2][3]


Choice of investigation


  1. For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.


  1. . Coin lesion (Lung).
  2. Tan BB, Flaherty KR, Kazerooni EA, Iannettoni MD; Flaherty; Kazerooni; Iannettoni; American College of Chest Physicians (January 2003). "The solitary pulmonary nodule ". Chest 123 (1 Suppl): 89S–96S. doi:10.1378/chest.123.1_suppl.89S. PMID 12527568. Archived from the original. . 
  3. Winer-Muram HT (April 2006). "The solitary pulmonary nodule ". Radiology 239 (1): 34–49. doi:10.1148/radiol.2391050343. PMID 16567482. Archived from the original. . 
  4. "Evaluation of the solitary pulmonary nodule ". Am Fam Physician 80 (8): 827–31. October 2009. PMID 19835344.