Tuberc Respir Dis > Volume 44(3); 1997 > Article
Tuberculosis and Respiratory Diseases 1997;44(3):505-515.
DOI: https://doi.org/10.4046/trd.1997.44.3.505    Published online June 1, 1997.
Accuracy of CT: Evaluation of Bronchial Invasion of Lung Cancer.
Jae Boem Na, Kyu Ok Choe, Kyung Young Chung, Se Kyu Kim, Jun Chang, Sung Kyu Kim
Abstract
BACKGROUND
We assessed the accuracy of staging in evaluation of bronchial invasion thus found the role of CT in patients who underwent resective surgery in primary lung cancer. Materials and METHODS: Authors retrospectively analized the preoperative CT scans of 156 patients receiving pneumonectomy(n=95) and lobectomy(n=61). Among lobectomy patients 7 patients subsequently performed pneumonectomy because of positive resection margin of bronchus in frozen biopsy. We also retrospect lively analized CT scans of non-operated 60 patients who Performed sufficient bronchoscopic biopsy. Bronchial wall thickness more than 3mm, irregular wall thickening find reduction of diameter by CT were defined as bronchial invasion. The pathologic examination of resection margin were positive in 20, stump recurrence occurred in 6 of the operated group, and the pathologic examination of biopsy of bronchial wall were positive in 34 of the non operated group, and these were all regarded as bronchial invasion. RESULTS: The CT assessment of bronchial invasion revealed low sensitivity (11.5%), low positive predictability(38%), but high specificity(96%) and relatively high accuracy (84%) in the operated group and higher sensitivity (62%), higher positive predictability(95%) in non-operated group. CONCLUSION: In lung cancer patients who underwent operation CT showed very low sensitivity and positive predictability In evaluation of bronchial invasion Because the usefulness of CT in evaluation of bronchial invasion is limited, therefore aggressive fiberoptic bronchoscopic biopsy is thought to be necessary before surgical attempt.
Key Words: Lung neoplasm, CT Bronchus


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