Impact of Nonosseous Findings on 18F-NaF PET/CT in a Patient with Ductal Breast Carcinoma

¹⁸F-NaF was used as a bone-seeking PET tracer for skeletal imaging until the introduction of the widely available ^99mTc-labeled bone agents. However, there is renewed clinical interest in ¹⁸F-NaF since prior technical and logistic limitations to its routine use are no longer present, and, as a consequence, it is likely that uptake unrelated to bone and non-osseous findings will be encountered more frequently. As a result of tumoral necrosis, soft tissue metastases may demonstrate ¹⁸F-NaF avidity due to dystrophic calcification. On the other hand, all non-osseous findings, whether ¹⁸F-NaF avid or not, may provide important diagnostic information that may alter the course of the disease, including treatment options. Herein we present a patient with ductal carcinoma of the breast in whom findings unrelated to the skeletal system in ¹⁸F-NaF PET/CT altered the treatment strategy.