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MR of pulmonary hamartoma: pathologic correlation
1Department of Radiology, School of Medicine, Shinshu University, Matsumoto, Japan.
Journal of Thoracic Imaging
|January 1, 1994
Summary
Pulmonary hamartomas show distinct magnetic resonance imaging (MRI) features. These lung tumors typically appear with intermediate T1 and high T2 signal intensity, with enhancing septa correlating to specific tissue types.
Area of Science:
- Radiology
- Pathology
- Oncology
Background:
- Pulmonary hamartomas are benign lung tumors.
- Accurate diagnostic imaging is crucial for differentiating them from malignant neoplasms.
Purpose of the Study:
- To correlate the magnetic resonance (MR) imaging findings of pulmonary hamartomas with their pathologic features.
- To identify characteristic MR imaging patterns for pulmonary hamartomas.
Main Methods:
- Retrospective review of MR imaging in six patients with pathologically confirmed pulmonary hamartomas.
- Correlation of MR imaging findings with surgical resection specimens.
Main Results:
- All six pulmonary hamartomas demonstrated intermediate signal intensity on T1-weighted images and high signal intensity on T2-weighted images.
- Lobulated appearance with septa was noted in four tumors on precontrast images.
- Gadolinium-enhanced T1-weighted images revealed marked enhancement of septa, dividing tumors into less enhanced lobules.
- Pathologic correlation identified less enhanced regions as cartilaginous tissue and septa, while enhanced areas corresponded to mesenchymal connective tissue.
Conclusions:
- MR imaging findings, particularly the enhancement patterns of septa, correlate well with the histopathologic composition of pulmonary hamartomas.
- Characteristic MR imaging features can aid in the diagnosis of pulmonary hamartomas.