Republic of Korea.

PET using 18F-FDG is frequently used to characterize pulmonary lesions suspicious for malignancy. However, increased 18F-FDG uptake in benign pulmonary lesions is not uncommon, and can be seen in active granulomatous diseases such as tuberculosis, fungal infection, sarcoido-sis, and other inflammatory entities. Paragonimiasis is a relatively rare cause of pulmonary disease; there have been only a few reported cases of pulmonary paragoni-miasis as a cause of false-positive results on FDG-PET examinations. We have found two cases of pulmonary paragonimiasis which were false-positive for malignancy on FDG-PET CT scan. Case 1 A 49-year-old man was referred to us from a local clinic in June 2004 for left upper quadrant abdominal pain an