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The revised lung adenocarcinoma classification-an imaging guide.

Natasha Gardiner¹, Sanjay Jogai¹, Adam Wallis¹

¹1 Specialty Registrar in Clinical Radiology, Wessex Deanery, UK ; 2 Consultant Histopathologist, University Hospital Southampton NHS Foundation Trust, UK ; 3 Consultant Radiologist, Portsmouth Hospitals NHS Trust, UK.

Journal of Thoracic Disease

|October 29, 2014

Summary

New lung adenocarcinoma classification clarifies terminology for peripheral lesions, distinguishing pre-invasive, minimally invasive, and invasive types. Radiologists must understand these changes for accurate staging and treatment.

Keywords:

Adenocarcinoma bronchiolo-alveolar computed tomography (CT)multiple pulmonary nodules non-small cell lung cancer solitary pulmonary nodules

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Area of Science:

Pulmonology
Radiology
Pathology

Background:

Peripheral lung adenocarcinomas, previously termed bronchoalveolar cell carcinoma (BAC), are a heterogeneous group of lesions.
Advances in understanding pathology, radiology, and clinical behavior necessitated a revised classification system.

Purpose of the Study:

To review the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society (IASLC/ATS/ERS) classification of lung adenocarcinomas.
To highlight the new terminology and its implications for radiological interpretation and clinical management.

Main Methods:

Review of the IASLC/ATS/ERS classification for lung adenocarcinomas.
Discussion of the spectrum of radiographic appearances, from ground glass nodules to solid masses.
Emphasis on the distinction between pre-invasive, minimally invasive, and invasive lesions.

Main Results:

The new classification provides clear distinctions between different stages of lung adenocarcinoma development.
Radiographic appearances correlate with the pathological classification, ranging from pure ground glass to solid lesions.
Accurate staging and treatment planning require awareness of this updated classification.

Conclusions:

The revised IASLC/ATS/ERS classification offers a more robust framework for understanding and managing peripheral lung adenocarcinomas.
Radiologists play a crucial role in applying this classification for accurate staging and multidisciplinary patient care.
Understanding the radiological implications of the new classification is essential for optimal patient outcomes.