CTICasesMucus in Airways Simulating Parenchymal Nodules (MIPS Pitfall)
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Imaging findings
Scattered pulmonary nodules were observed on an oncology CT protocol, particularly on MIPS imaging. Closer inspection revealed these nodules to be rod-shaped, consistently associated with airways, and representing small collections of mucus within the bronchi.
Key takeaways
Mucus in airways can simulate parenchymal nodules and metastases on CT, especially when using MIPS reconstructions, posing a diagnostic pitfall. Differentiating these pseudolesions relies on identifying their characteristic rod shape and their clear relationship to the bronchial tree. This can represent physiological mucus clearance rather than significant mucoid impaction from underlying bronchitis.
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