CTICasesSilicosis
Imaging findings
Serial radiographs and chest CT in a 70-year-old former sandblaster demonstrate advanced progressive massive fibrosis (PMF). Findings include countless, heavily calcified, small nodules in a peri-lymphatic distribution, coalescent mass-like areas of fibrosis, eggshell calcification of mediastinal and hilar lymph nodes, and extensive calcification of lymph nodes in the celiac and pancreaticoduodenal regions of the upper abdomen.
Key takeaways
Silicosis is a fibrotic pneumoconiosis caused by chronic inhalation of crystalline silica. The characteristic radiographic features include small, well-defined nodules that can calcify and coalesce into large masses (progressive massive fibrosis), and eggshell calcification of lymph nodes. In severe cases, swallowed silica dust can be transported to the abdominal lymph nodes via macrophages, leading to abdominal lymph node calcification.
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