IgG4-related aortitis/periaortitis and periarteritis: a distinct spectrum of IgG4-related disease
Abstract Background: Large vessels could be involved in IgG4-related disease(IgG4-RD).This study aimed to clarify the clinical features and evaluate the treatment efficacy for IgG4-RD with aortitis/periaortitis and periarteritis (PAO/PA). Methods: This study enrolled 587 IgG4-RD patients in a prospective cohort with a follow-up time for more than 6 months. The distribution of IgG4-related PAO/PA was classified into four types: type 1, thoracic aorta; type 2a, abdominal aorta; type 2b, abdominal aorta and iliac artery; type 2c, iliac artery; type 3, thoracic and abdominal aorta; type 4, other arteries. Patient’s demographic data, clinical characteristics, laboratory parameters, and treatment efficacy were analyzed. Results: Of 587 IgG4-RD patients, 89(15.2%) had PAO/PA. The average age was 58.3±11.1 years, with male predominance (85.4%). Vessels affected were as follows: abdominal aorta (83.1%), iliac artery (70.8%), thoracic aorta (13.5%) and other vessels (13.5%). The most prevalent distribution type of IgG4-related PAO/PA was type 2b, with 74 (83.1%) patients, followed by type 2a, type 2c, type 3, and type 1. 55 (61.8%) PAO/PA patients had hydronephrosis, with renal insufficiency occurred in 43 (48.3%), and 31 (34.8%) PAO/PA patients had D-J stent drainage due to severe ureteral obstruction. After treatment with glucocorticoid and immunosuppressants, 82% patients achieved a remission with shrinking of perivascular mass. Conclusions: IgG4-RD with PAO/PA was distinct from non-PAO/PA in demographic features, organs involvement distribution, inflammatory markers, serum IgG4 and IgE. The most common affected vessel was abdominal aorta, and most patients responded well with treatment.