Research ArticleTeaching Case Study

Parathyroid Scintigraphy with an Incidental Indirect Finding of Pancreatic Cancer

Ba D. Nguyen
Journal of Nuclear Medicine Technology June 2021, 49 (2) 188-189; DOI: https://doi.org/10.2967/jnmt.120.248831

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Figures

  • FIGURE 1.
    FIGURE 1.

    Axial, sagittal, and coronal SPECT/CT images of parathyroid scintigraphy showed parathyroid adenoma in left superior mediastinum positive for 99mTc-sestamibi uptake (A, circles) and negative for 123I-sodium iodide uptake (B, circles). SPECT/CT also showed prominent tracer activity in intra- and extrahepatic biliary ducts, with cutoff sign at distal common bile duct suggestive of obstruction (C, arrows).

  • FIGURE 2.
    FIGURE 2.

    Review of prior CT exam, performed 2 mo before parathyroid scan, showed soft-tissue fullness of head and uncinate process of pancreas suggestive of malignancy (A and B, arrows). MR cholangiography, after parathyroid scan, confirmed dilated biliary ducts from progressing unresectable adenocarcinoma at head of pancreas, with cutoff sign at distal common bile duct (C, arrow).

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