CTICasesDiffuse Invasive Mucinous Adenocarcinoma Mimicking Pneumonia
Imaging findings
This case presents with persistent opacities initially misdiagnosed as pneumonia, but which ultimately represent adenocarcinoma. CT imaging demonstrates a combination of nodules, some of which are solid, ground glass opacities, and a mixture of ground glass and consolidation. Some nodules exhibit cavitation or pseudocavitation, and areas within the right lower lobe also show pseudocavitation. Additional features observed may include a reverse halo sign.
Key takeaways
Diffuse invasive mucinous adenocarcinoma can mimic pneumonia, appearing with various patterns such as ground glass opacities, consolidation, and nodules, sometimes accompanied by cavitation or pseudocavitation. This entity is crucial to consider for persistent opacities that have been misdiagnosed as pneumonia. It's also important to note that mucinous varieties of adenocarcinoma can be TTF-1 negative.
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