Figure 17.

Biopsy-proven FDG-positive tuberculosis. This ex-smoker 72-year-old woman was detected with a mass at the right lung apex on a thyroid ultrasound. (A,B) Enhanced computed tomography (CT) of the chest showed a 28 × 15-mm ill-defined nodular density abutting the pleura (white arrows). There was no enlarged mediastinal or hilar lymph nodes. (C,D) Axial and coronal fused PET-CT images show increased tracer uptake with a maximum SUV of 4.0 (white arrowheads). No other FDG-avid lesions were identified. These findings were suspicious for bronchogenic, but a wedge resection pathology of this lesion showed “few acid-fast bacilli seen with necrotizing granulomatous inflammation.” No carcinoma was seen. Therefore, this FDG uptake can be seen in active tuberculosis. This patient was subsequently treated with antitubercular treatment.