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[CT findings in panacinar emphysema]
1Department of Internal Medicine (Section 3), Sapporo Medical College, Japan.
Nihon Kyobu Shikkan Gakkai Zasshi
|November 1, 1991
Summary
Computed tomography (CT) effectively identifies panacinar emphysema (PAE) and distinguishes it from centriacinar emphysema (CAE). CT scans revealed low-attenuation areas in four of five emphysematous lung lobes studied.
Area of Science:
- Pulmonary Medicine
- Radiology
- Pathology
Background:
- Panacinar emphysema (PAE) is a significant lung disease characterized by widespread destruction of alveoli.
- Accurate differentiation between PAE and centriacinar emphysema (CAE) is crucial for patient management and treatment strategies.
- Computed tomography (CT) is a primary imaging modality for evaluating lung diseases.
Purpose of the Study:
- To investigate the utility of CT imaging in the diagnosis of panacinar emphysema (PAE).
- To differentiate the CT imaging features of PAE from those of centriacinar emphysema (CAE).
Main Methods:
- Analysis of CT images from five lung lobes (three right lower, one right middle, one left lower) with diagnosed PAE.
- Lobes were obtained post-mortem or during thoracotomy for lung tumors and inflation-fixed.
- A CT-pathologic correlative study was performed on axially sliced lung lobes.
Main Results:
- One lobe with mild PAE showed normal CT appearance.
- Four lobes with PAE exhibited low-attenuation areas (LAAs) of varying shapes and sizes on CT.
- LAAs demonstrated diverse distribution patterns (local, zonal, diffuse) and associated vasculature changes (normal to diminished) within the affected lobes.
Conclusions:
- CT imaging is a valuable tool for the clinical diagnosis of panacinar emphysema (PAE).
- CT findings in PAE differ significantly from those reported for centriacinar emphysema (CAE), enabling differentiation.
- The study highlights the characteristic CT presentation of PAE, aiding in its distinction from other emphysema types.