Keywords:
Hybrid, Molecular and Translational Imaging, Hybrid Imaging, Nuclear medicine, Thyroid / Parathyroids, PET-CT, Biopsy, Epidemiology, Neoplasia, Pathology, Retrospective, Cross-sectional study, Performed at one institution
Authors:
S. Roddy1, T. J. Biggans1, A. K. raofi1, A. K. Kanodia2, T. Sudarshan1, P. Guntur1; 1Dundee/UK, 2Perth/UK
DOI:
10.26044/ecr2020/C-04722
Results
Six thousand, one-hundred and seventy-nine (n=6179) 18F-FDG PET scans were performed during study period.
Three-hundred and forty-two (n=342) results contained word “thyroid” of which two-hundred and seventy (n=270) scans had increased uptake in thyroid gland.
Eighty-seven (n=87) patients were excluded leaving a study group of one-hundred and eighty-three (n=183).
Ninety-four (n=94) PET-CT scans had focal uptake and eighty-nine (n=89) had diffuse uptake.
In those with focal uptake, twenty-five (n=25) patients had pathology results and fifty-two percent (52%, n=13/25) of these FNA biopsies confirmed malignancy. Thyroid malignancy subtypes included papillary (n=5), follicular (n=6), metastatic malignancy (n=1) and poorly differentiated carcinoma of thyroid (n=1).
Abnormal tracer uptake in thyroid gland incidentally as a proportion of all 18F-FDG PET-CT scans was 4.37%. Mean SUVmax value for papillary carcinoma was 8.2 g/ml and follicular carcinoma was 12.6 g/ml [Table 1].
Median SUVmax for papillary carcinoma was 7.4 g/ml and follicular carcinoma was 8.2 g/ml.