The value of18F-FDG PET/CT in the evaluation of multiple lung metastatic radioactive iodinerefractory differentiated thyroid cancer after apatinib therapy
张迎强, 张 鑫, 王 宸. The value of18F-FDG PET/CT in the evaluation of multiple lung metastatic radioactive iodinerefractory differentiated thyroid cancer after apatinib therapy[J]. China Oncology, 2018, 28(7): 505-510.
张迎强, 张 鑫, 王 宸. The value of18F-FDG PET/CT in the evaluation of multiple lung metastatic radioactive iodinerefractory differentiated thyroid cancer after apatinib therapy[J]. China Oncology, 2018, 28(7): 505-510. DOI: 10.19401/j.cnki.1007-3639.2018.07.005.
Background and purpose: Radioactive iodine-refractory differentiated thyroid cancer (RAIR-DTC) is a hot topic in recent years. The growth rates of different lesions and their responses to treatment vary a lot due to the heterogeneity of tumor cells. This study aimed to explore the value of
18
F-FDG PET/CT in RAIR-DTC after the therapy of apatinib. Methods: RAIR-DTC patients undergoing apatinib therapy in Peking Union Medical College Hospital were enrolled.
18
F-FDG PET/CT was performed at baseline
4 weeks and 8 weeks after apatinib therapy. Results: A total of 7 patients including 49 lung metastases were analyzed after apatinib therapy
with SUV
max
varying from 0.8 to 23.2. The results showed that the SUV
max
level of lesions at baseline was significantly associated with the changes in SUV
max
at 4 and 8 weeks after the treatment (SUV
max-4w
/SUV
max-baseline
SUVmax-8w/SUV
max-baseline
) (P0.000 1
P0.000 1). The rate of lesion diameter change (CT4w/b
CT8w/b) was not correlated with baseline SUV
max
at 4 weeks and 8 weeks (P=0.666 4
P=0.478 7). The 4-week change in SUVmax (SUV
max-4w
/SUV
max-baseline
) was significantly associated with CT4w/b and CT8w/b (P=0.033 3
P=0.004 8). For lesions with baseline SUV
max
greater than 5
SUV
max-baseline
had a linear relationship with CT4w/b and CT8w/b (P=0.008 2
P=0.016 9). Conclusion:
18
F-FDG PET/CT has great value in evaluating the heterogeneity
selecting target lesions and predicting the response in patients with RAIR-DTC after apatinib therapy.