For the period from June 1988 to July 1991 we studied 29 patients who were judged to have operable disease before mediastinoscopy on clinical criteria (absence of distant metastases, phrenic or laryngeal nerve paralysis, positive scalene node biopsy, and malignant pleural effusion).
All patients had computed tomography and mediastinoscopy prior to operation.
In the present study, the sensitivity, specificity, and accuracy of CT were 92%, 56%, and 72´lo0, respectively. And the sensitivity, specificity, and accuracy of mediastinoscopy were 92.1, 100%, and 97%, respectively.
We concluded that because of the low accuracy of CT, CT cannot replace mediastinoscopy, and routine mediastinoscopy should be performed in preoperative staging of bronchogenic carcinom-.
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