FDG uptake in giant cell tumor of the tendon sheath in a patient restaged for gastrointestinal stroma tumor (GIST).
A 70-year-old man known for recurrent abdominal gastrointestinal stroma tumor presented with a suspicious peritoneal mass demonstrated by an abdominal CT scan. Whole-body PET showed focal FDG uptake in the right hip, whereas the peritoneal mass was FDG negative. Histologic work-up of the PET positive lesion surprisingly revealed a giant cell tumor of the tendon sheath. The benignity of the peritoneal mass was confirmed by its disappearance in repeated CT scans. In general, focally increased FDG uptake should be subject to further investigations, especially in localizations that are not consistent with typical metastatic pathways of the former primary tumor.
Wissmeyer
Michael
M
Department of Nuclear Medicine, University of Berne, Berne, Switzerland. michael.wissmeyer@hcuge.ch
Kohl
Sandro
S
Juengling
Freimut D
FD
Stauffer
Edouard
E
Siebenrock
Klaus A
KA
Krause
Thomas M
TM
D000368:Aged; D019788:Fluorodeoxyglucose F18 / Q000378:metabolism*; D046152:Gastrointestinal Stromal Tumors / Q000473:pathology*; D005870:Giant Cell Tumors / Q000000981:diagnostic imaging / Q000378:metabolism* / Q000556:secondary; D006801:Humans; D008297:Male; D008566:Membranes / Q000473:pathology*; D009367:Neoplasm Staging; D049268:Positron-Emission Tomography; D013710:Tendons / Q000473:pathology*; D014057:Tomography, X-Ray Computed
D019788:Fluorodeoxyglucose F18