Could Breath Tests Soon Help Detect Lung Cancer and Avoid Biopsies?

A recent study conducted by Griffith University in Australia and published in the journal MedComm suggests that breath tests could potentially be developed to assess lung cancer risks. This non-invasive approach aims to help doctors distinguish between cancerous and benign lung nodules, which could eventually reduce the need for invasive procedures.

The Challenge: Not All Lung Findings Are Cancer

Lung nodules are small findings that often appear on CT scans, sometimes even in asymptomatic individuals. Although such findings frequently cause concern, the majority of nodules discovered during screenings turn out to be benign. However, imaging alone cannot always determine this, leading some patients to undergo biopsies to rule out malignancy.

Biopsies are invasive procedures that can entail complications such as bleeding or pneumothorax, a condition where air accumulates between the lung and the chest wall, potentially causing the lung to collapse.

How the Breath Test Works

Researchers examined two technologies for analyzing exhaled air:

Electronic nose: A device that identifies patterns of chemical substances in the air.
Advanced compound separation: A method to isolate and identify volatile organic compounds that may change due to bodily processes.

Both methods demonstrated promising abilities to differentiate between malignant and benign nodules, outperforming models based solely on standard clinical data.

Can the Test Replace Biopsy?

According to the researchers, the goal is not to replace biopsies entirely but to provide physicians with an additional tool. This tool will help determine which patients require urgent further investigation and who can be monitored instead of undergoing an immediate invasive procedure. Researchers emphasize that this remains a research technology requiring further validation before routine clinical integration.