Multicentric SDHD-related PGL syndrome (multiple HNPGL, 1 parasympathetic thoracic PGL, 1 sympathetic thoracic (cardiac) PGL, and 2 sympathetic retroperitoneal PGL). A. 18F-FDG PET/CT (MIP image) shows multiple foci, including uptake in a paravertebral sympathetic legion (arrow). B. Axial CT and fused 18F-FDG PET/CT images centered over the sympathetic thoracic PGL (arrows). C. 18F-FDOPA PET (MIP image) showing positive parasympathetic and extra-adrenal sympathetic PGL, but negative sympathetic thoracic PGL.