TO REVIEW THE ROLE OF PET/CT IN THE EVALUATION OF LUNG METASTASES IN THE COLORECTAL CANCER PATIENTS

Nguyễn Văn Khải1,, Nguyễn Quang Toàn2, Phạm Văn Thái3,4
1 Hanoi Oncology Hospital
2 Center of Radiology and nuclear medicine, K Hospital
3 Hanoi Medical University
4 Nuclear Medicine and Oncology Center, Bach Mai Hospital

Main Article Content

Abstract

Objective: To review the role of PET/CT in the evaluation of lung metastases in the colorectal cancer patients who had had undergone curative treatment. Material and methods: 39 patients (18 colon cancer and 21 rectal cancer) who had undergone curative treatment with pulmonary nodules were evaluated by contrast CT and PET/CT (with 18F-FDG ) at Hanoi Oncology Hospital from October 2019 to May 2020. A retrospective and prospective descriptive study. Results: The average age of patients in the study was 60,1 ± 13,3. 38,5% of patients had normal CEA levels. PET/CT detected more positive lesions than CT (48 vs 39). Most of the cases of lung metastasis in the study group had metastases with many small nodules, SUVmax values ​​were not high. The average size of pulmonary lesions was 1,0 ± 1,5 cm. The overall value of SUVmax of the group was 3,19 ± 2,23. PET/CT has sensitivity (95,7%) and specificity (62,5%) in evaluating pulmonary nodules. Conclusion: PET/CT detected more positive pulmonary lesions than CT with diagnostic sensitivity and specificity of 95,7% and 62,5%. However, with high positive predictive value, low cost and ease of implementation, CT remains useful in clinical practice.

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References

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