Figure 1. 56-year-old patient with a history of left-sided breast cancer. (a) Axial CT image shows a contrast-enhancing mass at the right thorax wall under the lower part of the greater pectoral muscle (white arrow). CT suggested a distant metastasis. (b) Corresponding axial PET image shows an area with pathologically increased glucose metabolism at the right thorax wall, suggesting a distant metastasis as well (black arrow). (c) Corresponding PET/CT image shows the contrast-enhancing mass with elevated glucose metabolism (white arrow). However, histopathology revealed granulomatous tissue without malignancy. All imaging modalities were evaluated as false positive.