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Pulmonary histiocytosis X: evaluation with high-resolution CT
M W Brauner1, P Grenier, M M Mouelhi
1Department of Medical Imaging, Hôpital Jean Verdier, Bondy, France.
Radiology
|July 1, 1989
Summary
High-resolution computed tomography (CT) reveals characteristic pulmonary lesions in histiocytosis X, primarily thin-walled cysts. CT imaging is superior to radiographs for detecting small cysts and nodules, showing disease progression over time.
Area of Science:
- Pulmonary Medicine
- Radiology
- Pathology
Background:
- Histiocytosis X, a rare disorder, can manifest with significant pulmonary involvement.
- Accurate imaging is crucial for diagnosing and monitoring pulmonary histiocytosis X.
Purpose of the Study:
- To characterize the high-resolution computed tomography (CT) findings in patients with pulmonary histiocytosis X.
- To compare the efficacy of CT versus chest radiography in detecting pulmonary abnormalities.
- To describe the CT-based evolution of pulmonary lesions in histiocytosis X.
Main Methods:
- Retrospective analysis of high-resolution CT scans from 18 patients with histiocytosis X.
- Detailed assessment of various pulmonary abnormalities including cysts, nodules, and reticulation.
- Comparison of CT findings with chest radiographs and observation of disease progression in one case.
Main Results:
- Thin-walled cysts were the most common finding (17/18 patients), often diffuse and predominantly in upper/middle lung zones.
- Other abnormalities included nodules (14/18), thick-walled cysts (7/18), and ground-glass opacities (4/18).
- CT demonstrated superior detection of small cysts and micronodules compared to chest radiographs.
Conclusions:
- High-resolution CT is highly sensitive for detecting pulmonary lesions in histiocytosis X, particularly cysts.
- CT imaging reveals a characteristic progression of lesions from nodules to various cystic forms.
- CT plays a vital role in the diagnosis, staging, and monitoring of pulmonary histiocytosis X.