Figure 2: Chest high-resolution CT showed atelectasis in the left lower lung three weeks after the onset of the disease(A). The color of subbronchiolar mucosa was pale and the lumen was occluded(B). Biopsy forceps were used to recanalize the subbranch occlusion under bronchoscope(C) and the recanalized airway subbranch(D).Chest high-resolution CT scan showed that atelectasis in the left lower lung got better one month after bronchoscopy(E).