Thoracic manifestation of Wegener's granulomatosis: Computed tomography findings and analysis of misdiagnosis.

The aim of the present study was to investigate the computed tomography (CT) manifestations of Wegener granulomatosis (WG) in the chest and potential reasons for misdiagnosis. Conventional CT scans and clinical data of 45 patients with WG were retrospectively analyzed. Patients typically presented with multiple system involvement, primarily in the upper and lower respiratory tract. The incidence of thoracic involvement was 75.56% (34/45). Radiographic features were varied between cases in the present study, with the most common features being numerous cavitary nodules and masses in the lungs. Cavitations were usually irregular, with uneven wall thickness, partial centrality, fuzzy inner edges and piecemeal necrosis. These results indicate that WG typically has multiple system involvement, with the chest being most prominent. Multiple variable-sized cavitary nodules with irregular edges and piecemeal necrosis were the most notable features revealed using CT scanning; however, in order to give a definitive diagnosis, biopsies should be performed.