18F-FDG uptake in the normal appendix in adults: PET/CT evaluation.
Ann Nucl Med
; 33(4): 265-268, 2019 Apr.
Article
em En
| MEDLINE
| ID: mdl-30652242
ABSTRACT
OBJECTIVE:
This study aimed to determine the level of 18F fluorodeoxyglucose (18F-FDG) activity in the normal adult appendix using positron emission tomography/computed tomography (PET/CT). MATERIALS ANDMETHODS:
We performed a retrospective review of PET/CT images using 18F-FDG in 563 consecutive asymptomatic adult patients without appendiceal pathology. We excluded 257 patients for an undetected or obscured appendix and three patients for appendicitis found on CT imaging. FDG uptake in the appendix was qualitatively and quantitatively assessed. The maximum standardized uptake value (SUVmax) was calculated for quantitative analysis with SUVmax of the normal liver for comparison. A total of 303 patients (200 males, 103 females, mean age of 66 years) were included in this study. Medical charts and histories were evaluated for patients who showed positive FDG accumulation. Pearson's correlations between appendiceal SUVmax and age, body mass index, and blood glucose levels were analyzed.RESULTS:
The mean appendiceal SUVmax was 1.14 (range 0.52-5.12) with an appendix-to-liver SUVmax ratio of 0.34 (range 0.06-1.28). Three patients qualitatively showed a positive FDG accumulation with appendiceal SUVmax greater than 3.00. There were no correlations between appendiceal SUVmax and age, body mass index, or blood glucose levels.CONCLUSIONS:
FDG in the normal adult appendix shows a low activity level and is lower compared with normal liver. However, the normal appendix can rarely show high FDG accumulation. In such cases, differentiation from appendiceal pathology solely by PET/CT images would be difficult.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Apêndice
/
Fluordesoxiglucose F18
/
Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada
Limite:
Adolescent
/
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Ann Nucl Med
Ano de publicação:
2019
Tipo de documento:
Article