Consistent with previous studies, the present study uncovered that in comparison with healthy children, FEV1% predicted and FEV1/FVC% were reduced in BA children, whereas inflammatory factors (IL‐6, IL‐17, IgE, and TNF‐α) and EOS were up‐regulated, which may be related to lung dysfunction and lung inflammation in BA patients. This evidence concerns the gene TNF and breast angiosarcoma.