CTICasesWelder's Siderosis
Imaging findings
Chest CT demonstrates diffuse, symmetric, and discrete centrilobular ground-glass nodules predominantly involving the upper lobes. There is a lack of associated fibrosis, architectural distortion, or septal thickening. The patient has an occupational history of welding for many years and minimal respiratory symptoms.
Key takeaways
Welder's siderosis is a benign, non-fibrotic pneumoconiosis caused by the inhalation of iron oxide particles. On CT, it presents with diffuse, discrete centrilobular ground-glass nodules mimicking hypersensitivity pneumonitis (HP) or respiratory bronchiolitis (RB). Unlike HP, patients are typically asymptomatic, and the absence of fibrosis or air trapping helps distinguish siderosis from other dust diseases.
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