Australia has seen a significant resurgence in occupational lung disease over the past decade — particularly silicosis among engineered stone (artificial stone bench top) workers. As a respiratory physician with extensive experience in this area, and as an accredited independent medical examiner, I see firsthand the impact these conditions have on patients and their families.
What Is Occupational Lung Disease?
Occupational lung disease refers to a range of respiratory conditions caused or worsened by workplace exposures. These include:
- Silicosis — caused by inhalation of crystalline silica dust
- Asbestosis and asbestos-related pleural disease — caused by asbestos fibre inhalation
- Coal workers’ pneumoconiosis — from coal dust exposure
- Occupational asthma — triggered by workplace sensitisers or irritants
- Hypersensitivity pneumonitis (extrinsic allergic alveolitis) — from organic dust or chemical exposures
- Mesothelioma — a malignancy of the pleura almost exclusively caused by asbestos
- Occupational COPD — from long-term dust, fume, or vapour exposure
The Silicosis Resurgence
Until relatively recently, silicosis was considered a disease of the past — largely confined to older miners. That changed dramatically with the widespread adoption of engineered stone (silica content up to 93%) in kitchen and bathroom renovations. Stonemasons cutting and polishing these products were exposed to extremely high concentrations of respirable silica dust.
The resulting epidemic of silicosis — including accelerated silicosis occurring after just a few years of exposure, and in workers in their 30s and 40s — prompted significant regulatory action. Queensland was among the first jurisdictions to implement mandatory health surveillance and, ultimately, to ban engineered stone entirely.
Despite the ban, there remain thousands of workers with significant silica exposure histories who have not been assessed. Silicosis is progressive and can be fatal — early identification allows for monitoring, removal from exposure, and access to workers’ compensation entitlements.
Symptoms to Watch For
Occupational lung diseases often develop slowly and may not cause symptoms until significant damage has occurred. Warning signs include:
- Progressive breathlessness — particularly on exertion
- Chronic cough
- Reduced exercise tolerance
- Chest tightness
- Unexplained weight loss or fatigue (in more advanced disease)
Critically, some patients with silicosis remain asymptomatic on presentation despite radiological disease. This is why screening high-risk workers — even in the absence of symptoms — is important.
Assessment and Diagnosis
Assessment typically involves:
- A detailed occupational history — documenting the type, duration, and intensity of exposure
- Chest imaging — chest X-ray and, crucially, high-resolution CT (HRCT) of the chest
- Lung function testing (spirometry and full lung function)
- Exercise testing in some cases
- In selected cases, bronchoalveolar lavage or biopsy for tissue diagnosis
The International Labour Organisation (ILO) classification system is used to grade the extent of radiological abnormality on chest X-ray in pneumoconiosis — a system I am trained and experienced in applying.
Medico-Legal Aspects
Many patients with occupational lung disease have entitlements to workers’ compensation, including:
- Medical expenses
- Income replacement during incapacity
- Permanent impairment lump sum payments (assessed using the AMA 5th Edition Guides)
I hold a Certificate in Permanent Impairment Assessment (CertPI) and Certificate in Independent Medical Examination (CertIME) from the Australasian College of Independent Medical Examiners (ACIME), and I have been involved in hundreds of medico-legal cases involving occupational lung disease. I prepare independent medical examination reports for insurers, lawyers, and government agencies.
A Note to General Practitioners
If you have a patient with a relevant occupational history — current or former work in construction, mining, quarrying, stone bench top fabrication, foundry work, farming, or other dusty industries — a low threshold for respiratory assessment is warranted. Early detection matters.
Referral for a specialist opinion and baseline investigations allows for appropriate monitoring and, if disease is present, timely access to entitlements and care.
Please feel free to contact my rooms on 07 3123 5350 to discuss a referral.