As it is known that the timing of radiologic resolution of pneumonia varies with patient age and the presence of an underlying lung disease, we considered this as a nonresolving pneumonia, because radiologic clearance of the pneumonia in this patient should be expected in 4 to 6 weeks. Many of the causes of nonresolving pneumonia were considered, such as neoplasms (eg, adenocarcinoma with lepidic growth, lymphoma), TB and fungal infections, inflammatory disorders such as cryptogenic organizing pneumonia, eosinophilic pneumonias, systemic vasculitis, and drug-induced lung diseases. We decided to perform flexible bronchoscopy. Abnormal mucosa (with erythema and swelling) in the left lower lobe bronchus was noted, and numerous bronchial washings and brushings were obtained for routine microbiology, acid-fast bacilli staining, GeneXpert (a cartridge-based test to detect DNA sequences specific for Mycobacterium tuberculosis and rifampicin resistance by polymerase chain reaction [PCR]), culture for TB, and cytology. Transbronchial biopsies were sent for routine histology and microbiology. None of the microbiologic samples yielded any positive results. Normal bronchial cells with some chronic inflammatory cells but without malignancy were present on cytology.