Detection of primary sites in unknown primary tumors using FDG-PET or FDG-PET/CT View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2011-12

AUTHORS

Jong Sun Park, Jae-Joon Yim, Won Jun Kang, June-Key Chung, Chul-Gyu Yoo, Young Whan Kim, Sung Koo Han, Young-Soo Shim, Sang-Min Lee

ABSTRACT

BACKGROUND: Carcinoma of unknown primary tumors (CUP) is present in 0.5%-9% of all patients with malignant neoplasms; only 20%-27% of primary sites are identified before the patients die. Currently, 18F-fluorodeoxy-glucose positron-emission tomography (18F-FDG PET) or PET combined with computed tomography (PET/CT) is widely used for the diagnosis of CUP. However, the diagnostic yield of the primary site varies. The aim of this study was to determine whether PET or PET/CT has additional advantages over the conventional diagnostic workup in detecting the primary origin of CUP. FINDINGS: Twenty patients with unknown primary tumors that underwent PET or PET/CT were included in this study. For all patients, the conventional diagnostic workup was unsuccessful in detecting the primary sites. Among 20 patients, 11 had PET scans. The remaining nine patients had PET/CT. In all 20 patients, neither the PET nor PET/CT identified the primary site of the tumor, including six cases with cervical lymph node metastases. The PET and PET/CT revealed sites of FDG uptake other than those associated with known metastases in seven patients, but these findings did not influence patient management or therapy. Two patients had unnecessary invasive diagnostic procedures due to false positive results on the PET or PET/CT. CONCLUSIONS: Although it is inconclusive because of small sample size of the study, the additional value of PET or PET/CT for the detection of primary sites in patients with CUP might be less than expected; especially in patients that have already had extensive conventional diagnostic workups. Further study is needed to confirm this finding. More... »

PAGES

56

Journal

TITLE

BMC Research Notes

ISSUE

1

VOLUME

4

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/1756-0500-4-56

DOI

http://dx.doi.org/10.1186/1756-0500-4-56

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1041518447

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/21385465


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