Abstract: Objective To study 30 cases of pulmonary granuloma misdiagnosed as lung cancer.Method To retrospectively analyze cases from 1995 to 2009 that were imageologically misdiagnosed as lung cancer while whose pathology turned out to be pulmonary granuloma,and then to figure out the strategy for misdiagnosis of this kind.Results Most of the cases were solitary nodules,whose diameter varied from 2.0~6.0cm.Irregular mass were observed in 21 cases while round or lump mass in 9 cases.And uneven and partial lower density in the centre of the mass was observed in most cases in plain scan.Even intra-neoplasma enhancement was observed in 16 cases while uneven in the other 14.Clear margin were seldom found in these cases.Conclusion To avoid misdiagnosis,clear differential diagnoses and seriously study on clinical manifestations between imageological findings is necessary,and some other methods of imagiology may be a complementation.

Key words: Granuloma, Misdiagnosed, Lung Cancer, Tomography, X-ray computed