CTICasesPulmonary Hyalinizing Granuloma
Imaging findings
Serial chest CT scans show multiple large, well-defined calcified pulmonary nodules demonstrating popcorn-like calcification. The nodules show slow growth and coalescence over time. A large calcified subcarinal lymph node is present, and a subsequent calcium score scan shows a cavitating nodule containing a broncholith. Biopsy confirmed hyalinized granuloma.
Key takeaways
Pulmonary hyalinizing granuloma is a rare benign fibrosing lesion of the lung that presents as single or multiple slowly growing nodules. They frequently calcify and can coalesce, mimicking metastases or amyloidosis, and are often associated with prior exposure to histoplasmosis or tuberculosis.
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