CTICasesTumor Thrombotic Microangiopathy
Imaging findings
VQ scan shows a classic "segmental contour" perfusion pattern; CT may show subtle mosaic attenuation and attenuated peripheral vessels.
Key takeaways
This distinctive VQ pattern in a patient with known malignancy is highly suggestive of tumor emboli in small vessels. Diagnosis can be confirmed via pulmonary artery wedge cytology.
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