Incidental Benign Parotid Lesions on FDG-PET: Prevalence and Clinico-pathologic Findings / 핵의학분자영상
Nuclear Medicine and Molecular Imaging
;
: 359-363, 2007.
Article
in Korean
| WPRIM
| ID: wpr-179422
ABSTRACT
PURPOSE:
Incidental parotid lesions on F-18 FDG-PET can mimic distant metastasis of underlying malignancy. The prevalence and the clinico-pathologic findings of PET positive parotid lesions have not been known. We investigated how often incidental parotid lesions are found on clinical FDG-PET studies and what the clinico-pathologic characteristics of those parotid lesions are in the present study. MATERIALS ANDMETHODS:
We retrospectively reviewed 3,344 cases of FDG-PET which had been obtained in our hospital from May 2003 to Dec 2006. The indications of FDG-PET were evaluation of known/suspected cancer (n=3,212) or screening of cancer in healthy subjects (n=132). Incidental parotid lesion on FDG-PET was defined as an un-expected FDG uptake in one of parotid glands which was not primary target lesion of current FDG-PET. FDG uptake was represented by maximum standardized uptake value (maxSUV). Final diagnosis was made by pathologic analysis or clinical follow-up assessment.RESULTS:
Fifteen (0.45% = 15/3,344) incidental parotid lesions were found and they were all benign lesions. The maxSUV ranged from 1.7 to 8.6 (mean+/-s.d.=3.7+/-1.9). Final diagnoses of the incidental parotid lesions were; Warthin's tumor (n=2), pleomorphic adenoma (n=1), other un-specified benign lesion (n=1), and benign lesions under bases of imaging studies (n=3) and of clinical follow-up (n=8).CONCLUSION:
All of incidentally found parotid lesions in clinical FDG-PET studies were confirmed as benign lesions with prevalence of 0.45%. Close follow up using PET or CT might be a reasonable approach for determining the nature of incidentally found parotid lesions.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Parotid Gland
/
Mass Screening
/
Prevalence
/
Retrospective Studies
/
Follow-Up Studies
/
Adenoma, Pleomorphic
/
Diagnosis
/
Neoplasm Metastasis
Type of study:
Diagnostic study
/
Observational study
/
Prevalence study
/
Prognostic study
/
Risk factors
/
Screening study
Language:
Korean
Journal:
Nuclear Medicine and Molecular Imaging
Year:
2007
Type:
Article
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