Figure 3.

66-year old female with left sided breast cancer complains of generalized bone pain. A. ¹⁸F-NaF PET/CT MIP images show increased tracer activity in the sternum, the left 1^st and 2^nd rib. Increased tracer uptake is also seen in both knees and the distal right leg. B. Transaxial NaF images show increased tracer uptake in the right ankle. C. CT shows a bifid appearance of the tip of the lateral malleolus of the right fibula, representing an accessory ossicle. D, E. Fused ¹⁸F-NaF PET/CT images show increased tracer uptake at the articulation site. Findings are consistent with a symptomatic os subfibulare.