Abstract： Objective To discuss the imaging features of pulmonary lophomonas blattarum infecfiom Methods Seventeen patients with renal homotransplantations presented fever without congh.dyspnea and shortness of breath in 1-4 months after the transplantation were included.Chest X-ray abnormalities were comfirmed as pulmonary lophomonag blattarum infection through fiberoptic bronchoscopy (FOB)and bronchoalveolar lavage(BAL).The X-ray and CT films were reviewed and the imaging features were summarized.Results X-ray appearances:Bilateral pulmonary shadows were seen in 16 patients.of which 9 cases presented patchy and cord shadows,and 7 cases presented large area of pathy shadows.Lung marking increase Wag seen in 1 case.CT appearances:CT abnormalities presented bilaterally and involved more than two lobes in all 16 patients.15 eases displayed ground-glass opacity.11 cases displayed patchy consolidation,14 cases displayed bandlike attenuation,and 8 cases displayed nodular opacity.Ground-glass opacity,consolidation and bandlike attenuation were seen simultaneously in 11 cases.Lymph node enlargement in mediastinum Wag presented in 10 cages.Conclusion Pulmonary lophomonas blattarum infection should be suspected in immunosuppressed patients combining the CT appearances and clinical information.