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局灶性机化性肺炎是难以与肺癌相鉴别的良性病变之一。作者研究18例经组织学证实的病例,以明确本病的CT特征。10例男性,8例女性,年龄33～77岁,平均55岁。所有病例胸平片均疑为肺癌。15例患者无症状,3例有咳嗽及咯痰。8例病灶直径小于2cm,3例为2～3cm,4例为3～4cm,3例大于4cm。18例病灶均位于外围肺实质,7例(39％)与胸膜面相接,6例(33％)沿支气管血管束,5例(28％)与胸膜或支气管血管束无关。5例(28％)病灶呈圆形,13例(72％)呈卵圆、梭形或梯形。16例(39％)结节与周围肺
Focal sessional pneumonia is one of the benign lesions that is difficult to differentiate from lung cancer. The authors studied 18 cases confirmed by histology in order to clarify the CT features of the disease. 10 males, 8 females, aged 33 to 77 years, mean 55 years. Chest radiographs of all cases were suspected of lung cancer. Fifteen patients were asymptomatic and three had cough and expectoration. The diameter of the lesion was less than 2 cm in 8 cases, 2 to 3 cm in 3 cases, 3 to 4 cm in 4 cases and more than 4 cm in 3 cases. Eighteen lesions were located in the parenchyma of the peripheral lung, 7 (39%) connected to the pleural surface, 6 (33%) along the bronchovascular bundle, and 5 (28%) unrelated to the pleural or bronchovascular bundle. Five cases (28%) had round lesions and 13 (72%) showed oval, fusiform or trapezoidal shape. 16 (39%) nodules and peripheral lungs