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Related Experiment Videos

Usual interstitial pneumonia: histologic correlation with high-resolution CT.

K Nishimura1, M Kitaichi, T Izumi

  • 1Chest Disease Research Institute, Kyoto University, Japan.

Radiology
|February 1, 1992
PubMed
Summary

High-resolution computed tomography (HRCT) can identify microscopic honeycombing and perilobular distribution in usual interstitial pneumonia (UIP). This imaging technique correlates well with pathological findings in idiopathic pulmonary fibrosis cases.

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Area of Science:

  • Radiology
  • Pulmonology
  • Pathology

Background:

  • Idiopathic pulmonary fibrosis (IPF) is a progressive lung disease.
  • Usual interstitial pneumonia (UIP) is the most common histological pattern in IPF.
  • Accurate diagnosis of UIP is crucial for patient management.

Purpose of the Study:

  • To correlate high-resolution computed tomographic (HRCT) findings with pathological findings in UIP.
  • To assess the ability of HRCT to identify key features of UIP, including microscopic honeycombing and perilobular distribution.

Main Methods:

  • Review of 46 cases of UIP.
  • Correlation of HRCT findings with open lung biopsy and autopsy specimens.
  • Detailed analysis of specific HRCT features such as cystic spaces, air bronchiolograms, pleural and vessel thickening, and lung attenuation.

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Main Results:

  • HRCT demonstrated macroscopic honeycombing corresponding to small cystic spaces.
  • Microscopic honeycombing (air bronchiolograms in areas of intense lung attenuation) correlated with dilated, fibrotic bronchioles.
  • Irregular pleural surfaces, thickened vessels and bronchial walls were attributed to perilobular fibrosis.
  • Slightly increased lung attenuation on HRCT corresponded to patchy alveolar septal fibrosis or inflammation.

Conclusions:

  • HRCT is effective in identifying microscopic honeycombing in UIP.
  • HRCT can clearly demonstrate the perilobular distribution characteristic of UIP.
  • HRCT findings correlate well with pathological examination, aiding in the diagnosis of UIP.