Comparison between community-acquired pneumonia and post-obstructive pneumonia associated with endobronchial tumors

Endobronchial tumors can infiltrate the bronchial wall or protrude into the bronchial lumen, causing post-obstructive pneumonia (POP). Differentiating between POP and community-acquired pneumonia (CAP) is challenging due to similar clinical, laboratory, and imaging findings, which can delay the diagnosis and treatment of endobronchial tumors. We compared general demographic information, laboratory test results, lung CT images, bronchoscopic observations, pathological findings between the POP group and the CAP group. (1) The POP group consisted mainly of older individuals (mean age 69 vs. 56 years; P