Understanding Air in the Body: A Radiologic Perspective on Emphysematous and Traumatic Conditions

Abnormal collections of air within body tissues and anatomical compartments, although relatively uncommon, represent critical radiologic findings. The causative factors vary from invasive infections by gas-forming organisms to traumatic and iatrogenic breaches of tissue planes. Early and accurate radiologic identification is essential, as delayed diagnosis may result in significant morbidity and mortality. The study objective is to describe the spectrum of computed tomography (CT) imaging features, etiopathogenesis, and clinical significance of some emphysematous infections, including emphysematous pyelonephritis, cystitis, pancreatitis, and osteomyelitis, as well as traumatic and non-infectious air-related conditions such as pneumocephalus, subcutaneous emphysema, pneumothorax, pneumomediastinum, and pneumoperitoneum.

A Pictorial review was conducted at a tertiary healthcare institution. The cases of emphysematous and traumatic air-related conditions diagnosed on computed tomography between July 2024 and June 2025 were retrieved from the Picture Archiving and Communication System (PACS), and characteristic diagnostic imaging findings were analysed. The clinical parameters and outcomes of patients were also analysed using hospital records, and findings were correlated with scholarly published literature.

Most emphysematous infections, including pyelonephritis and pancreatitis, as well as trauma-related conditions such as tension pneumocephalus and pneumomediastinum, are associated with a high risk of mortality. Computed tomography consistently demonstrated the highest sensitivity for accurate diagnosis and for stratifying disease severity.

Abnormal air patterns represent a critical diagnostic feature in radiology, particularly on computed tomography. The knowledge of these characteristic imaging signs and their clinical relevance allows early intervention and better patient management.