Q-13. Gold standard investigation for recurrent gastrointestinal stromal tumor is (AIIMS NOV 2008)
a) MRI
b) MIBG
c) USG
d) PET CT
Answer: PET CT
Explanation:
CT and 18F-FDG PET have comparable sensitivity and positive predictive values in staging malignant recurrent GISTs. However, 18F-FDG PET is superior in predicting early response to therapy.