肺癌是常见的恶性肿瘤之一,其发病率在国内外有迅速增长的趋势。肺癌除转移性肺肿瘤外,以肺内单发肿块表现居多。由于肺内单发肿块并非癌性肿块所特有,某些炎性肿块如肉芽肿、球形肺炎、肺脓肿、叶间积液等,亦多有此征象。需临床医生认识和鉴别。 Lung cancer is one of the most common malignant tumors and its incidence has been rapidly increasing at home and abroad. Lung cancer in addition to metastatic lung cancer, the performance of single solitary mass in the lungs. Due to the solitary mass in the lung is not unique to cancerous masses, some inflammatory mass such as granulomas, spherical pneumonia, lung abscess, interstitial fluid, also have this sign. Need to understand and identify clinicians.