17 June 2026
: Case report 
Chlamydia trachomatis Pneumonia in a 50-Day-Old Full-Term Male Infant Associated With Mucus Plugging of the Left Upper Lobe Bronchus and Left Upper Lobe Atelectasis
Challenging differential diagnosis, Rare disease
Yuan Huang
ABCDEF 1, Meixia Huang AB 1, Liqin Ke EF 1, Shuxian Li ABF 1, Xiaofen Tao B 2, Guohong Zhu AEF 1*
DOI: 10.12659/AJCR.953643
Am J Case Rep 2026; 27:e953643
Figure 1 Chest imaging of our case. (A) Chest radiograph showing pneumonia in the left upper lung. (B–D) High-resolution chest computed tomography demonstrating left upper lung atelectasis, with stenosis and occlusion of the left upper lobe bronchus. (E) Follow-up chest radiograph after 11 days of treatment, showing significant resolution of left upper lung atelectasis. (F) Follow-up chest radiograph after 20 days of treatment, returning to normal.