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Related Experiment Videos

Radiographically occult endobronchial obstruction in bronchogenic carcinoma.

D Shure1

  • 1Division of Pulmonary and Critical Care Medicine, Veterans Administration Medical Center, San Diego, California 92161.

The American Journal of Medicine
|July 1, 1991
PubMed
Summary

Many lung cancers causing complete airway obstruction are not visible on chest X-rays. This study found nearly half of completely obstructing endobronchial lesions were radiographically undetectable, impacting cancer diagnosis and treatment.

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Area of Science:

  • Pulmonology
  • Oncology
  • Radiology

Background:

  • Central endobronchial tumors can cause airway obstruction.
  • Radiographic detection of obstruction depends on severity and location.
  • The incidence of radiographically undetectable obstruction is not well-established.

Purpose of the Study:

  • To determine the incidence of radiographically undetectable completely obstructing lesions during diagnostic bronchoscopy.
  • To investigate the characteristics of these occult obstructions.

Main Methods:

  • Prospective study of patients undergoing bronchoscopy for suspected lung cancer.
  • Analysis of chest radiographs taken within 24 hours prior to bronchoscopy.
  • Inclusion of patients with confirmed complete endobronchial obstruction.

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Main Results:

  • Eighty-one completely obstructing lesions were identified in 77 patients.
  • 36% (44%) of these lesions were radiographically undetectable.
  • Obstruction of segmental bronchi was more likely to be occult than proximal airway obstruction.
  • 13% of patients with complete obstruction had normal chest radiographs despite symptoms.

Conclusions:

  • Complete endobronchial obstruction from lung cancer can frequently be radiographically undetectable.
  • This has significant implications for lung cancer diagnosis, staging, and treatment assessment.
  • Routine bronchoscopy is crucial for identifying obstructions missed by imaging.