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THE IMAGING CHARACTERISTICS AND THE ROLE OF 18F-FDG PET/CT IN EVALUATING LIVER LESIONS IN PATIENTS WITH RECURRENT COLORECTAL CANCER
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Abstract
Objective: To evaluate the imaging characteristics of liver lesions in patients with recurrent or suspected recurrence of colorectal cancer who underwent PET/CT with 18F-FDG. Subjects and methods: 160 patients with colorectal cancer (97 patients with colon cancer and 63 patients with rectal cancer) with radical treatment underwent PET/CT when they had recurrence or suspected recurrence at the Department of Nuclear Medicine, Hanoi Oncology Hospital. Cross-sectional descriptive study. Results: PET/CT detected liver lesions in 31/160 patients (19,4%), the rate of positive lesions was 82,8%. Most patients had multifocal lesions (71%). The higher the CEA concentration, the higher the rate of lesion detection. The average size of the lesion was 2,61 ± 1,52 cm. The average SUVmax value of the lesion was 6,52 ± 2,89. SUVmax values increased with lesion size. The difference was statistically significant (p < 0,01). Conclusion: The rate of positive lesions detected on PET/CT was high (82,8%). PET/CT is useful and should be used when simultaneously evaluating other extrahepatic lesions in patients with colorectal cancer.
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Keywords
colorectal cancer, liver metastasis, PET/CT
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