Comparison of delayed enhanced CT and 18F-FDG PET/CT in the evaluation of adrenal masses in oncology patients.
OBJECTIVE
To retrospectively compare delayed enhanced computed tomography (CT) and 18F-fluorodeoxyglucose positron emission tomography (18F-FDG PET)/CT (PET/CT) evaluating adrenal masses in oncology patients undergoing both examinations.


METHODS
Twenty adrenal masses in 14 patients were retrospectively included. For delayed enhanced CT, a metastasis was diagnosed if a mass had an absolute percentage loss of enhancement value of less than 60%. For PET/CT, a metastasis was diagnosed if a mass had FDG uptake equal to or greater than that of the liver.


RESULTS
The adrenal masses were confirmed as 8 metastases and 12 adenomas by pathological examinations in 5 patients and follow-up CT examinations in 9 patients. The sensitivity and specificity for adenoma at delayed enhanced CT were all 100% and were 88 (7/8) and 75% (9/12) for PET/CT, respectively. Delayed enhanced CT correctly characterized 1 more metastasis and 3 more adenomas than PET/CT.


CONCLUSIONS
Delayed enhanced CT might characterize adrenal masses in oncology patients more exactly than PET/CT.
Park
Byung Kwan
BK
The Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. rapark@skku.edu
Kim
Chan Kyo
CK
Kim
Bohyun
B
Choi
Joon Young
JY
D000236:Adenoma / Q000175:diagnosis; D000310:Adrenal Gland Neoplasms / Q000175:diagnosis*; D000328:Adult; D000368:Aged; D003287:Contrast Media; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis / Q000175:diagnosis; D049268:Positron-Emission Tomography / Q000379:methods*; D011856:Radiographic Image Enhancement / Q000379:methods; D019275:Radiopharmaceuticals; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*
D003287:Contrast Media; D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18