School ager with fever and vomiting Pediatric Imaging Chest July 12, 2026April 22, 2026 CXR PA (left) shows a dense opacity overlying the heart and obscuring the medial aspect of the left hemidiaphragm (silhouette sign) while the lateral radiograph (right) shows dense opacity over the lower aspect of the spine (spine sign). The diagnosis was bacterial pneumonia in the posterior left lower lobe. Related Published July 12, 2026April 22, 2026