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"CT angiogram sign" in obstructive pneumonitis and pneumonia
S Murayama1, H Onitsuka, J Murakami
1Department of Radiology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Objective:
The "CT angiogram sign" in dynamic pulmonary CT consists of enhanced branching pulmonary vessels in a homogeneous hypoattenuating consolidation of lung parenchyma and is reportedly useful for diagnosing lobar bronchioloalveolar cell carcinomas.
Materials And Methods:
To identify cases exhibiting the CT angiogram sign, we retrospectively reviewed the reports of 5,500 dynamic incremental CT examinations of the chest.
Results:
We identified the CT angiogram sign in five patients with obstructive pneumonitis due to lung tumors and four patients with pneumonias.
Conclusion:
The CT angiogram sign can be observed in pulmonary consolidation of varying etiologies.