Breakthrough Brush Test Offers Rapid, Accurate Oral Cancer Detection

Oral cancer incidence and mortality have more than doubled worldwide since 1990, with 650,000 new cases. Risk factors: tobacco, alcohol, HPV infection, sugary drinks, and sun damage. Diagnosis usually requires a painful scalpel biopsy that can cause infection or tissue damage. Because biopsies are invasive, many patients avoid follow-up, contributing to late-stage detection; over half of cases are diagnosed at stage IV.

Brush Biopsy Test Detects Oral Cancer in One HourScienceAlert

Researchers from Queen Mary University of London, King George’s Medical University, Modern Dental College and Research Centre, and All India Institute of Medical Sciences evaluated qMIDS-V3, third version of quantitative Malignancy Index Diagnostic System, in a 2026 *Biomarker Research* study that collected brush swabs from 545 patients with potentially malignant oral lesions, generating over 1,000 samples. Each swab was analyzed for mRNA expression of four cancer-linked genes, including a control sample. Results were available within one hour, showing 95.5 % accuracy and false-positive/negative rates below 5 %.

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Study of 545 patients with >1,000 brush-biopsy samples achieved 95.5 % accuracy, with false-positive and false-negative rates each under 5 %. It could cut surgical biopsies and referrals for cancer-free patients by >90 %. UK urgent oral-cancer referrals rose 450 % while detection rates fell 50 %, with 92.5-99.5 % of referrals cancer-free.

Brush Biopsy Test Detects Oral Cancer in One Hour

The brush-based test eliminates tissue excision, reducing pain, infection risk, and dental or bone damage. Rapid results enable efficient triage and repeat monitoring of high-risk OPMD patients. Researchers project commercial availability within two years, potentially lowering clinical workload and health-system costs.

Brush Biopsy Test Detects Oral Cancer in One Hour

The team noted the test’s speed and repeatability enable monitoring of pre-malignant lesions, detecting malignant change earlier than current pathways, with a four-gene signal robust even in superficial cells. Queen Mary University of London seeks a commercial partner for deployment.

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• “[This test] gives clinicians a rapid, accurate, and non-invasive way to triage patients, and crucially, it can be repeated,” — Muy-Teck Teh, oncologist, Queen Mary University of London

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• “We were genuinely astonished by the fact that the brush swab test performance is comparable to a microbiopsy,” — Muy-Teck Teh, oncologist, Queen Mary University of London

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• “It suggests that the biological signal captured by these four genes is sufficiently strong and consistent that it can be detected even from the superficial exfoliated cells collected by a brush biopsy.” — Muy-Teck Teh, oncologist, Queen Mary University of London

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• “Oral cancer survival is directly linked to how early it is found, yet our current diagnostic pathway is blunt most patients with a suspicious lesion end up having an invasive biopsy even when the overwhelming likelihood is that it is benign,” — Muy-Teck Teh, oncologist, Queen Mary University of London

Brush Biopsy Test Detects Oral Cancer in One Hour