CTICasesMycobacterium Avium Complex (MAC) Lung Nodule Mimicking Malignancy
Imaging findings
CT showed a bilobed, non-calcified nodule with irregular margins and adjacent ground glass in the anterior segment of the upper lobe, concerning for malignancy. Retrospectively, a few subtle clusters of other nodules were noted.
Key takeaways
Infectious nodules, including those caused by Mycobacterium Avium Complex (MAC), can appear highly concerning for malignancy on CT. Subtle additional findings may help broaden the differential to include infection.
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