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Parotid incidentaloma identified by combined 18F-fluorodeoxyglucose whole-body positron emission tomography and computed tomography: findings at grayscale and power Doppler ultrasonography and ultrasound-guided fine-needle aspiration biopsy or core-needle biopsy

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Author(s)
이상권노병학원경숙
Alternative Author(s)
Lee, Sang KwonRho, Byung HakWon, Kyoung Sook
Publication Year
2009
Abstract
Twelve parotid incidentalomas
in 10 consecutive subjects (nine
with a known malignancy elsewhere
and one presumptively healthy
subject) identified by combined
18F-fluorodeoxyglucose whole-body
positron emission tomography and
computed tomography (18F-FDG
PET/CT) were investigated, with the
aim of calculating maximum standardized
uptake value (SUVmax) of each
FDG-avid focus, and identifying
corresponding sonographic and
pathologic findings. The results of
ultrasound-guided fine-needle aspiration
biopsy (FNAB) (n=9) and coreneedle
biopsy (CNB) (n=3) were
Warthin tumor in 10 cases, and
pleomorphic adenoma and chronic
inflammation in one each. SUVmax
was 7.0–21.0 g/mL (average 13.7 g/
mL) for Warthin tumor, 6.8 g/mL for
pleomorphic adenoma, and 7.3 g/mL
for chronic inflammation. Each FDGavid
focus corresponded to ovoid
(n=11) or lobulated (n=1) hypoechoic
mass on grayscale ultrasonography
(US) and hypervascular mass, except
one with chronic inflammation, on
power Doppler (PD) US. Parotid
incidentaloma identified by 18F-FDG
PET/CT during workup of various
malignancies elsewhere does not
necessarily signify primary or metastatic
malignancy, but indicates a high
likelihood of benign lesions, particularly
Warthin tumor. Such lesions
should be evaluated thoroughly by US
and ultrasound-guided FNAB or CNB
if parotid disease would change the
patient’s treatment plan.
Keywords Parotid gland .
Incidentaloma . Warthin tumor .
FDG . PET/CT . Ultrasonography .
Fine-needle aspiration biopsy .
Core-needle biopsy
Department
Dept. of Radiology (영상의학)
Dept. of Nuclear Medicine (핵의학)
Publisher
School of Medicine
Citation
European Radiology, Vol.19(9) : 2268-2274, 2009
Type
Article
ISSN
0938-7994
DOI
10.1007/s00330-009-1407-5
URI
http://kumel.medlib.dsmc.or.kr/handle/2015.oak/35691
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