Respiratory · UKMLA & AKT
Asbestos-related lung cancer
A free high-yield preview for the UKMLA Applied Knowledge Test. Below are the key points to recognise asbestos-related lung cancer — the full SA Note notes add investigations, management, complications and 10 practice questions.
Key high-yield points
- Asbestos causes both primary lung carcinoma (any histological subtype) and mesothelioma - distinct entities
- Latent period: 20-45 years between first exposure and diagnosis
- Crocidolite (blue) asbestos is the most dangerous fibre type - amphibole, straight, needle-like, penetrates deeply and persists indefinitely
- Pleural plaques - benign, not premalignant; confirm prior asbestos exposure but do NOT increase risk of lung cancer or mesothelioma
- Severity of asbestosis correlates with duration and intensity of exposure
- Smoking + asbestos = multiplicative synergy for lung cancer risk (smoking impairs mucociliary clearance, increasing fibre dwell time)
Pleural plaques are benign and NOT premalignant - a common exam trap. Their presence confirms asbestos exposure but does not independently raise malignancy risk.
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