Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Unknown primary tumors: detection with dual-modality PET/CT--initial experience.

Andreas Gutzeit1, Gerald Antoch, Hilmar Kühl

  • 1Department of Diagnostic and Interventional Radiology, University Hospital of Essen, Hufelandstrasse 55, 45122 Essen, Germany. Andreas.Gutzeit@ksa.ch

Radiology
|November 27, 2004
PubMed
Summary

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

From knowing to acting: closing the emergency gap in contrast-induced anaphylaxis.

European radiology·2026
Same author

Severe anaphylactic reaction to contrast agent: teams are well prepared but should simulate the situations regularly.

The British journal of radiology·2025
Same author

Thyroid Hormone Withdrawal Yields Higher <sup>131</sup>I Absorbed Dose to Metastases Than rhTSH Stimulation in Differentiated Thyroid Cancer: Evidence from a Large <sup>124</sup>I PET/CT Dosimetry Cohort.

Journal of nuclear medicine : official publication, Society of Nuclear Medicine·2025
Same author

Response-guided first-line therapy and treatment of relapse in aggressive lymphoma: 10-year follow-up of the PETAL trial.

Blood neoplasia·2025
Same author

Tumor Dose-Response Relationship of [<sup>131</sup>I]MIBG Therapy in Patients with Neural Crest Tumors by Means of [<sup>124</sup>I]MIBG PET.

Journal of nuclear medicine : official publication, Society of Nuclear Medicine·2025
Same author

Autism spectrum disorder: Practice guidelines for pharmacists.

Canadian pharmacists journal : CPJ = Revue des pharmaciens du Canada : RPC·2024

Positron emission tomography/computed tomography (PET/CT) showed potential in identifying primary tumors in unknown primary cancers. However, larger studies are needed to confirm if PET/CT significantly improves detection rates compared to other imaging methods.

Area of Science:

  • Oncology
  • Radiology
  • Medical Imaging

Background:

  • Cancer of unknown primary (CUP) presents a diagnostic challenge.
  • Accurate primary tumor identification is crucial for effective treatment planning.

Purpose of the Study:

  • To compare the efficacy of fused positron emission tomography/computed tomography (PET/CT) with PET, CT, and side-by-side PET and CT evaluations in detecting the primary lesion in CUP.
  • To assess the diagnostic performance of PET/CT in identifying the primary tumor site in patients with CUP.

Main Methods:

  • Retrospective analysis of 45 patients diagnosed with CUP.
  • All patients underwent whole-body fluorine-18 fluorodeoxyglucose (FDG) PET/CT imaging with oral and intravenous contrast agents.
  • PET/CT data were compared with individual PET, CT, and combined PET and CT interpretations using McNemar test with Bonferroni correction.

Related Experiment Videos

Main Results:

  • PET/CT identified the primary tumor in 33% of patients, while the primary site remained occult in 67%.
  • PET and CT side-by-side evaluation detected 29% of tumors, PET alone 24%, and CT alone 18%.
  • No statistically significant differences were found in diagnostic accuracy between PET/CT and the other imaging modalities.

Conclusions:

  • PET/CT demonstrated a trend towards higher primary tumor detection rates but did not reach statistical significance compared to other methods.
  • Further research with larger patient cohorts is necessary to definitively establish the value of PET/CT in CUP diagnosis.
  • Current findings suggest PET/CT may offer a slight advantage, warranting further investigation.