Pulmonary inflammatory pseudotumor: correlative study of HRCT features and pathological findings
TAO Xin1, ZHAO Zhi-mei2, ZHAO Run1, JIANG Wei1, ZOU Xiao-gang1, YU Ming-ji1
1.Department of Radiology，Shanghai Jiangwang Hospital, Shanghai 200434, China;2.Department of Radiology, Yanbian Hospital, Yanbian University Medical College, Yanji Jilin 133000, China
Abstract：Objective: To study HRCT features of 37 cases of pulmonary inflammatory pseudotumor and assess their value in differential diagnosis. Materials and Methods: Thirty-seven cases pulmonary inflammatory pseudotumors(PIP) confirmed at resection and pathology with diameter≤3cm were performed HRCT scan after common CT scan. The morphologic features of PIP with HRCT were analyzed and compared with pathological findings. 104 cases of peripheral lung carcinoma(PLC) were selected at the same time in random sampling as control. Results: The most common locations of PIP were at the margin of both lower lobes and associated with local pleural thickening and adhesion. The density of nodule in which CT attenuation value was 15~60HU(26.9±13.5HU) was lower than that of PLC. Most of them were round/round-like and irregular in shape. The interior density of lesion was inhomogeneous. The presence of calcification or multiple cavitations, straight margin sign, hole sign and without hilar and mediastinal adenopathy were of great significance in the diagnosis of such kind of disease. Conclusion: Some HRCT features of PIP could reflect their pathological findings. It is necessary to increase the diagnostic rate by comprehensive analyzing the HRCT features of PIP with the history of infection.
2007, Vol. 18 
