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Related Experiment Videos

Intrapulmonary lymph nodes: CT and pathological features.

H Miyake1, Y Yamada, T Kawagoe

  • 1Department of Radiology, Oita Medical University, Hasama-machi, Japan.

Clinical Radiology
|October 29, 1999
PubMed
Summary

Intrapulmonary lymph nodes, often found in smokers, appear as small nodules on CT scans. Follow-up imaging is recommended for suspected cases to monitor changes.

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Area of Science:

  • Radiology
  • Pulmonary Medicine
  • Pathology

Background:

  • Intrapulmonary lymph nodes are frequently observed in computed tomography (CT) and chest radiographs.
  • These findings are common, particularly in individuals with a history of heavy smoking.

Purpose of the Study:

  • To describe the imaging characteristics and clinical presentation of intrapulmonary lymph nodes in a cohort of elderly, heavy-smoking patients.
  • To evaluate the utility of follow-up CT in managing suspected intrapulmonary lymph nodes.

Main Methods:

  • Retrospective analysis of four patients over 55 years old with a history of heavy smoking.
  • Detailed review of CT imaging findings, including location, size, morphology, and changes over time.
  • Histopathological examination of resected nodules (where applicable) to identify lymphoid follicles and anthrocotic pigment.

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Main Results:

  • Four intrapulmonary lymph nodes were identified in the subpleural regions of the lower lobes.
  • The nodes were ovoid/round, homogeneous, well-defined, measuring 9-10 mm in diameter.
  • In one patient, coexistent nodules showed slight interval growth over 3 years; all contained lymphoid follicles and anthrocotic pigment.

Conclusions:

  • Intrapulmonary lymph nodes in heavy smokers can present with non-specific CT and clinical features.
  • Follow-up CT is a valuable tool for monitoring patients with suspected intrapulmonary lymph nodes to assess for any changes.
  • Distinguishing these benign findings from other pulmonary nodules may require careful radiological assessment and potentially follow-up.