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Insights into Imaging
Fig. 3 | Insights into Imaging

Fig. 3

From: CT and 18F-FDG PET abnormalities in contacts with recent tuberculosis infections but negative chest X-ray

Fig. 3

Representative CT and 18-fluorodeoxyglucose PET images showing incipient TB progressing into active tuberculosis disease in a 60-year-old female with malignancy. a, b CT and PET images for metastasis work-up shows a small single incidental nodule with subtle hypermetabolism in the left lobe lobe (black arrow). There was no metabolic uptake in mediastinal lymph nodes. (c) A follow-up CT image 6 months later reveals the increasing size of the nodule with micronodular infiltration (black arrow). The patient still denied any symptoms and signs. The sputum smear and culture was negative for Mycobacterium tuberculosis. The specimen of percutaneous transthoracic lung biopsy turned to be chronic granulomatous inflammation with necrosis, consistent with active tuberculosis disease

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