“…To the best of our knowledge, only seven cases, including the present case, have been reported without any evidence of a severe immunosuppressive status (Table), such as solid organ and/or hematological malignancy, post-transplant, AIDS, insulin-dependent diabetes mellitus and steroids and/or immunosuppressive therapy (5,14,(16)(17)(18)(19)(20)(21). Four of the seven reported patients with ITBA were immunocompetent (5, 16, 19), and the others had either SLE/DM, tracheal and bronchial structural abnormalities such as tuberculosis (20) or COPD (21).…”