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- W3100950376 abstract "Tumor-induced osteomalacia (TIO) is a rare paraneoplastic syndrome in which tumors secrete phosphaturic factors such as fibroblast growth factor-23, which increases renal phosphate excretion, causing hypophosphatemia and osteomalacia. These tumors have mesenchymal origin and are usually small and slow growing, and they can be located anywhere in the body. Because the cure for TIO includes its total resection, the challenge of the treatment is to locate it (1). Once TIOs express somatostatin receptor subtypes 2 and 5, In-octreotide (especially if combined with SPECT/CT [single photon emission computed tomography/computed tomography]) and more recently Ga-DOTANOC PET/CT (positron emission tomography/CT) and Ga-DOTATATE PET/CT have been shown to be excellent in their detection (2). Because TIOs are highly vascular, Tc-sestamibi scintigraphy (MIBI) has also been used for this purpose (3–5). We follow four patients (three women and one man; ages 12–46 y) whose clinical picture and laboratorial data suggested hypophosphatemic osteomalacia, which was confirmed by bone histomorphometry. They underwent whole-body scintigraphy In-Octreotide (Octreoscan) and Tcsestamibi to localize the tumor. Both methods revealed that the same body areas of focally increased tracer uptake in different anatomical sites in each patient (right leg, left foot, left leg, and left knee) were visualized in detail with magnetic resonance image (Figure 1). Histopathological findings after the tumor’s resection confirmed the existence of phosphaturic mesenchymal tumor, a mixed connective tissue variant. In these four patients, both methods (whole-body scintigraphy In-octreotide and MIBI) detected TIOs. For this reason, when Octreoscan is not available, we encourage TIO screening by MIBI." @default.
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- W3100950376 date "2014-01-01" @default.
- W3100950376 modified "2023-09-26" @default.
- W3100950376 title "Concordance between whole-body scintigraphy 111 in octreotide and 99m Tc-sestamibi uptake in the detection of four tumor-induced osteomalacia cases" @default.
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