Objective To investigate the effect of allergen-specific immunotherapy on FEV1 and airway responsiveness in patients with idiopathic asthma.Methods 90 patients with idiopathic asthma from January 2013 to August 2015 in Deqing City People's Hospital were selected and randomly divided into control group and study group with 45 cases in each group.Control group were treated with anti-infection, relieving cough and eliminating phlegm, relieving spasm and relieving asthma, the study group was treated with allergen specific immunotherapy based on the control group, and a total of 3 months for a course of treatment.Blood samples were used to measure inflammatory mediators , airway sensitivity index, pulmonary function and airway responsiveness, at the same time, the clinical efficacy and complications were compared.Results Compared with before treatment, the levels of FVC, PEF, FEV1 and FEV1/FVC in the two groups increased, levels of AI, AO, T and WA decreased, levels of serum IL-4 decreased, levels of IL-10, IFN-γincreased, levels of serum IgE, SIgE, TIgE and EOS decreased, the difference was statistically significant (P<0.05), compared with the control group, the levels of FVC, PEF, FEV1 and FEV1/FVC in the study group were higher, the levels of AI, AO, T and WA were lower, serum IL-4 levels were lower after treatment, levesls of IL-10, IFN-γwere higher, levels of serum IgE, SIgE, TIgE and EOS were lower, the difference was statistically significant (P<0.05), and the effective rate in the control group (71.11%) was lower than the study group (88.89%), the difference was statistically significant(P <0.05).Conclusion Allergen-specific immunotherapy was effective for cough variant asthma, it can improve pulmonary function, inflammation and airway sensitivity.

Objective To investigate the clinical data of a patient with IgG4-related disease involving the trachea and paratracheal soft tissue and review the literature so as to improve the understanding level of the disorder.Methods To analyze the clinical manifestation,laboratory examination,imaging,histopathology,treatment and prognosis of a patient with IgG4-related disease trachea and paratracheal soft tissue involved,who was admitted to the Department of Respiratory and Critical Care Medicine at Beijing Chaoyang Hospital.The relevant literatures were reviewed.Results A 18-year-old female was admitted with chief complaint of cough,dyspnea,and neck mass.Neck CT suggested that tracheal stenosis was caused by surrounded soft tissue.Paratracheal mass biopsy showed dense collagen fibers with infiltration of many lymphocytes and plasma cells.Immunohistochemical stain found that IgG4-positive plasma cells were ＞ 50/high power field (HPF) and a ratio of IgG4/IgG positive cells was over 40％.The level of serum IgG4 was significantly increased (2 930 mg/L).She was diagnosed as IgG4-related disease.The patient was treated with 80 mg intravenous methylprednisolone per day for three days,then prednisone 40 mg daily oral.Her dyspnea was significantly relieved.One month later,CT scan showed that the cervical tracheal stenosis was significantly improved.We identified 20 cases of IgG4-related disease involving the trachea and paratracheal soft tissue from databases,in which only 1 case was similar as this patient.The other 19 cases were of extratracheal involvement.Elevated serum IgG4 was detected in 11/12 patients.Most patients were treated with glucocorticoid,some combined with immunosuppressive agents and rituximab.The clinical outcome was good.Conclusion IgG4-related disease involving the trachea and paratracheal soft tissue is a rare condition.Serum IgG4 level and histopathology should be considered for diagnosis.Glucocorticoid is effective.