Perifissural lung nodules

Perifissural lung nodules (PFNs) are a type of intrapulmonary nodules that, most of the times, represent pulmonary lymph nodes

Although perilymphatic pulmonary nodules can also be perifissural in distribution, they should be distinguished from PFNs, as they are usually associated with a number of conditions. 

PFNs are typically seen as well-circumscribed, smoothly marginated homogeneous nodules in contact with or closely related to a pulmonary fissure. Most show a triangular, oval/lentiform, rectangular, or dumbbell shape. They may often show a septal attachment to the pleural surface 3.

Worrisome features that are not typical for lymph nodes and should be reported, prompting for imaging follow-up, include 6

  • round morphology or contour irregularity
  • the adjacent fissure is abnormal: bowed, retracted, or transgressed

If they have typical morphology they are favoured to be benign despite some nodules having a tendency to grow over serial scans 2.

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Article information

rID: 30372
System: Chest
Section: Gamuts
Tag: cases
Synonyms or Alternate Spellings:
  • Perifissural nodule
  • Perifissural lung nodule
  • Perifissural nodules in lung
  • Perifissural nodules
  • Perifissural pulmonary nodules
  • Perifissural pulmonary nodule

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