CTICasesSclerosing pneumocytoma with air-gap sign
Imaging findings
CT scan shows a smooth, well-defined pulmonary nodule with a focal air-gap sign (a narrow crescent of lucency between the nodule and the adjacent parenchyma). Sestamibi and DOTATATE scans were intensely positive.
Key takeaways
Sclerosing pneumocytoma (formerly sclerosing hemangioma) is a benign epithelial lung tumor. It can show intense DOTATATE avidity (mimicking carcinoid) and can present with an air-gap sign due to airway compression or adjacent air trapping.
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