Non-Traumatic Thoracic Emergencies: Diagnostic Challenges (2025)-M1-CER04-2025

Video Transcription

Video Summary

The session focuses on high-acuity, non-traumatic thoracic emergencies, emphasizing pattern recognition and key imaging findings to reduce diagnostic uncertainty. Dr. Tan Muhammad reviews non-infectious causes of “opacified lungs” in the ED and how to distinguish them from mimics such as hydrostatic pulmonary edema, infection, and COVID-19. He highlights smoke inhalation injury (ARDS-like diffuse alveolar damage) where chest radiographs are nonspecific but CT may show ground-glass opacities with “crazy paving” and can reveal overlooked pleural effusions. Aspiration pneumonitis typically shows dependent consolidations but may be nondependent depending on patient position; centrilobular nodules can suggest inhalational material. Lipoid pneumonia is identified by fat within consolidation on CT. EVALI (vaping-associated lung injury) often presents with patchy ground-glass opacities, sometimes with relative lower-lobe sparing. COVID-19 commonly shows peripheral/subpleural ground glass, with more severe or repeat infections progressing to consolidation and ARDS patterns. Near-drowning can mimic noncardiogenic edema; clinical history and absence of pleural effusions may help. Diffuse alveolar hemorrhage shows patchy ground glass with characteristic subpleural sparing, and CT may detect disease underestimated on radiographs. Treatment is largely supportive; imaging’s main role is identifying mimics and guiding management.<br /><br />Dr. Bruno Hochhegger discusses lung transplant patients in the ED, stressing that accurate diagnosis depends on the post-transplant timeline. Early findings include reperfusion edema (common, usually resolves by day 10), while opacities after day 10 raise concern for acute rejection. Infection is a major cause of mortality, but imaging often guides biopsy location rather than providing a single specific diagnosis. He reviews chronic lung allograft dysfunction (CLAD) as a key late complication and notes transplant-specific infection patterns (e.g., tree-in-bud more typical for aspergillosis than halo sign).

Keywords

non-traumatic thoracic emergencies

opacified lungs differential diagnosis

smoke inhalation injury CT crazy paving

aspiration pneumonitis dependent consolidation

EVALI vaping-associated lung injury imaging

diffuse alveolar hemorrhage subpleural sparing

lung transplant complications reperfusion edema acute rejection CLAD