Distant Metastases and Synchronous Malignancies on FDG-PET/CT in Patients with Head and Neck Cancer: a Retrospective Study

Overview

Journal Acta Radiol

Specialty Radiology

Date 2020 Jan 7

PMID 31902218

Citations 1

Authors

Lennart Flygare

Amal Al-Ubaedi

Wilhelm Ohman

Susanna Jakobson Mo

Affiliations

Soon will be listed here.

Abstract

Background: Fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) has been proven to be a good method to detect distant spread of head and neck cancer (HNC). However, most prior studies are based on Asian populations and may not be directly transferable to western populations.

Purpose: To investigate the frequency and distribution of distant metastases and synchronous malignancies detected by PET/CT in HNC in a northern Swedish population.

Material And Methods: All primary whole-body FDG-PET/CT examinations performed on the suspicion of HNC (n = 524 patients) between 1 January 2013 and 31 December 2016 at Umeå University Hospital in Sweden were retrospectively reviewed . After the exclusion of 189 examinations without evidence of primary HNC, 335 examinations were analyzed.

Results: Distant metastases were detected in 10 (3%) patients, all with advanced primary tumors corresponding to TNM stage 3-4, most frequently in salivary gland adenocarcinoma, where 50% of patients had distant spread. Four patients had metastases below the diaphragm, representing 20% of the salivary gland malignancies. In the remaining six patients, metastases were supraphrenic, of which all but one were identified by CT alone. Synchronous malignancies were discovered in 14 (4.2%) patients, of which five were below the diaphragm.

Conclusion: The overall frequency of distant spread and synchronous malignancy in primary HNC was generally low. However, the risk for distant metastases below the diaphragm was relatively higher in salivary gland adenocarcinoma, supporting whole-body FDG-PET/CT in the primary diagnostic work-up in these patients.

Citing Articles

PET/MR versus PET/CT for locoregional staging of oropharyngeal squamous cell cancer.

Flygare L, Erdogan S, Soderkvist K Acta Radiol. 2022; 64(5):1865-1872.

PMID: 36464816 PMC: 10160406. DOI: 10.1177/02841851221140668.

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