The Role of 18F-FDG PET/CT for Evaluation of Cervical Metastatic Lymph Nodes in a Patient with Metallic Artifacts from Dental Prosthesis: a Case Report

Cervical metastasis of squamous cell carcinoma from an unknown primary site occurs in approximately 2–4% of head and neck tumor cases. Without identification of the primary site, proper management cannot be achieved, resulting in significant morbidity and a lower cure rate. For the primary site asse...

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Bibliographic Details
Published in:Nuclear medicine and molecular imaging 2020, 54(5), , pp.252-255
Main Authors: Park, Joon Yeun, Lee, Yu Hyun
Format: Article
Language:English
Subjects:
Cancer
Cardiology
Case Report
Case reports
Computed tomography
Diagnostic software
Diagnostic systems
Emission analysis
Fluorine isotopes
Imaging
Lymphatic system
Medicine
Medicine & Public Health
Metastasis
Nuclear Medicine
Oncology
Orthopedics
Positron emission
Prostheses
Radioactive tracers
Radiology
Tomography
Tongue
Tumors
방사선과학
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Summary:Cervical metastasis of squamous cell carcinoma from an unknown primary site occurs in approximately 2–4% of head and neck tumor cases. Without identification of the primary site, proper management cannot be achieved, resulting in significant morbidity and a lower cure rate. For the primary site assessment, positron emission tomography/computed tomography (PET/CT) using the radiotracer 18 F-fluorodeoxyglucose (FDG) is the imaging modality of choice and has been shown to be superior to CT alone. Here, we report a case of cervical metastasis of squamous cell carcinoma in an 82-year-old man. 18 F-FDG PET/CT revealed a tongue-base lesion, although neck CT detected no lesions because of artifacts from dental prosthesis, which was suspected as the primary site. The final diagnosis was confirmed as tongue-base cancer with neck lymph node metastases through biopsy. These results suggest that 18 F-FDG PET/CT is a valuable diagnostic tool in patients with cervical metastatic lymph nodes because it can demonstrate primary tumors in patients with dental prosthesis.
ISSN:1869-3474
1869-3482
DOI:10.1007/s13139-020-00658-3