Scoping beyond pulmonary artery involvement; pulmonary involvement in Behcet's disease; a retrospective analysis of 28 patients.

Objectives: Pulmonary involvement other than pulmonary artery involvement in Behcet's disease still remains an area of investigation. The aim of this study was to evaluate pulmonary involvement associated with Behcet's disease.

Method: We retrospectively investigated all Behcet's disease patients in terms of pulmonary involvement. Twenty-eight patients, whose radiologic examinations were consistent with Behcet's disease-related involvement after excluding other possibilities, were included in this study. Data regarding demographic characteristics, other clinical components of Behcet's disease, treatment modalities, and types of pulmonary involvement were analyzed.

Results: Pulmonary involvement was seen more common in male (82.1% vs 17.9%). Mean age for Behcet's disease diagnosis was found 32 years (SD 10.9) and mean age for pulmonary involvement was calculated 37 years (SD 11.4). Deep vein thrombosis (DVT) was the most common associated vascular involvement (53.6%). In our study population, alveolar hemorrhage and/or ground glass appearance were seen in 46.4% (13/28) of BD patients with pulmonary involvement. Totally, pulmonary artery aneurysm (PAA), small-sized pulmonary vasculitis (sPV), and pulmonary thrombosis (PT) were seen in 7 (25%), 13 (46.3%), and 18 (64.4%) of patients, respectively. Intracardiac thrombosis (ICT) in the right ventricle was present in 5 patients. Cyclophosphamide (CYC) was the most common preferred agent (78%) followed by azathioprine (AZA) in the first line. Warfarin was used in 18 patients. Overall mortality was seen in 3 patients: 1 due to PAA bleeding and others with unknown causes.

Conclusion: Despite the importance of pulmonary artery involvement and pulmonary thrombosis in Behcet's disease, small-sized pulmonary vasculitis in the form of small vessel involvement is generally overlooked. Our study findings have shown that alveolar hemorrhage and/or ground-glass appearance in the absence of pulmonary artery aneurysm and pulmonary thrombosis are seen commonly as well. Key Points • The characteristics of pulmonary small vasculature involvement in Behcet's disease which is still an area of investigation warrant further attention. • The clinician should bear in mind that the spectrum of pulmonary involvement in Behcet's disease may be variable, but an extensive work up is still of great importance especially in atypical cases.