False Negative Pet Scan

Figure 1. CT

Axial CT shows a spiculated lesion in the left lung, consistent with malignancy. Bronchioloalveolar carcinoma was proven at biopsy.


Figure 2. False Negative PET

Axial PET at the same level as the above CT shows only a minimally metabolically active lesion (circled), not suggestive of malignancy.


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