Abstract
DOTA-ibandronic acid (IBA) is a novel precursor targeting bone metastasis. It can be radiolabeled with 68 Ga for the diagnosis of bone metastases. However, extraosseous lesions can also show increased DOTA-IBA uptake. We report the 68 Ga-DOTA-IBA PET/CT findings in a case with cholangiocarcinoma with multiple bone metastases. 68 Ga-DOTA-IBA PET/CT revealed increased uptake of DOTA-IBA in bone metastases. Besides, symmetrical and diffuse increased DOTA-IBA uptake in bilateral salivary glands was observed. 99m TcO 4- salivary gland scintigraphy showed impaired salivary gland function.
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