FDG PET or PET/CT in Evaluation of Renal Angiomyolipoma.
10.3348/kjr.2013.14.2.337
- Author:
Chun Yi LIN
1
;
Hui Yi CHEN
;
Hueisch Jy DING
;
Kuo Yang YEN
;
Chia Hung KAO
Author Information
1. Department of Nuclear Medicine, Show Chwan Memorial Hospital, Changhua 500, Taiwan.
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Computed tomography;
Fluorine-18 fluoro-2-deoxy-D-glucose;
Positron emission tomography;
Renal angiomylipoma
- MeSH:
Angiomyolipoma/*radionuclide imaging;
Contrast Media/diagnostic use;
Ehlers-Danlos Syndrome;
Female;
Fluorodeoxyglucose F18/diagnostic use;
Humans;
Kidney Neoplasms/*radionuclide imaging;
Male;
Middle Aged;
*Positron-Emission Tomography;
*Positron-Emission Tomography and Computed Tomography;
Radiopharmaceuticals/diagnostic use;
Retrospective Studies
- From:Korean Journal of Radiology
2013;14(2):337-342
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: Angiomyolipoma is the most common benign kidney tumor. However, literature describing FDG PET findings on renal angiomyolipoma (AML) is limited. This study reports the FDG PET and PET/CT findings of 21 cases of renal AML. MATERIALS AND METHODS: The study reviews FDG PET and PET/CT images of 21 patients diagnosed with renal AML. The diagnosis is based on the classical appearance of an AML on CT scan with active surveillance for 6 months. The study is focused on the observation of clinical and radiographic features. RESULTS: Six men and 15 women were included in our study. The mean age of the patients was 57.14 +/- 9.67 years old. The mean diameter of 21 renal AML on CT scans was 1.76 +/- 1.00 cm (Min: 0.6 cm; Max: 4.4 cm). CT scans illustrated renal masses typical of AMLs, and the corresponding FDG PET scans showed minimal FDG activities in the area of the tumors. None of the 21 AMLs showed a maximum standardized uptake value (SUVmax) greater than 1.98. No statistically significant correlation was present between SUVmax and tumor size. CONCLUSION: Renal AMLs demonstrate very low to low uptake on FDG PET and PET/CT imaging in this study. When a fat-containing tumor in the kidney is found on a CT scan, it is critical to differentiate an AML from a malignant tumor including an RCC, liposarcoma, and Wilms tumor. This study suggests that FDG PET or PET/CT imaging is useful for differentiating a renal AML from a fat-containing malignant tumor.
