17 September 2013
: Case report 
High fluorodeoxyglucose (18F)PET-uptake lymph nodes in a patient with chordoma: Tumor metastasis or sarcoidosis?
Challenging differential diagnosis, Rare disease
Mohamad Hossain GharaviBDEF, Hope Hueizhi WuDE, Steven A. TomsABCDEGDOI: 10.12659/AJCR.889329
Am J Case Rep 2013; 14:373-375
Abstract
Background: Fluorodeoxyglucose positron emission tomography (FDG-PET) has been used in imaging and staging of malignancies including sacral chordomas.
Case Report: The author’s report describes the coincident pathological diagnosis of sarcoidosis in a 48-year-old male patient with a recurrent sacral chordoma. Chordoma is a low grade malignancy with frequent systemic metastases in advanced disease. Both metastases and sarcoidosis may be high FDG uptake. Unexpected PET findings need to be biopsied in order to make appropriate clinical decision in the management of chordoma.
Conclusions: Lymph nodes involvement in sarcoidosis and neoplastic disease can have similar FDG-PET manifestations.
Keywords: Notochord, Granuloma, imaging
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