Among the 22 cases examined with X-ray and CT in chest,54%whose lesions were located in both uppre lobes,14 were with clear cut border and 8 with vague border(2 radioactive burr,3 dlviding lobe and 2 air-bron -chial sign).

• 胸部X线及CT检查，病变在两肺上叶占54%25，肿块边缘清楚14例，模糊8例，其中2例有放射性毛刺，3例有分叶，2例有空气支气管征。