CTICasesSilicosis with eggshell calcifications in a diatomaceous earth worker
Imaging findings
Chest radiograph demonstrates characteristic eggshell calcification of the mediastinal and hilar lymph nodes, along with subtle reticular and nodular opacities in the left upper lobe.
Key takeaways
Diatomaceous earth consists of amorphous silica, which can cause silicosis upon chronic occupational exposure. Eggshell calcification (peripheral calcification of lymph nodes) is highly characteristic of silicosis and coal worker's pneumoconiosis.
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