PMC10348067_01
Axial plane; A- CT image highlighting the rectal tumour; B- PET image; C- Fused PET-CT image.
jbsr-107-1-3186-g1.jpg
PMC10348067_01_jbsr-107-1-3186-g1.jpg
F1
It emphasized a tumour mass in the upper rectum which, after biopsy, was concluded to be a microsatellite stable BRAF-wild-type adenocarcinoma displaying KRAS-mutations (12ASP). 18F-FDG PET-CT staging revealed focal uptake in the upper rectum (Figures 1 and 2), with only one distant, 35-mm metastatic lesion in the anterior lateral segment of the liver (Figure 3).
Sagittal plane; A- CT image; B- PET image; C- Fused PET-CT image.
jbsr-107-1-3186-g2.jpg
PMC10348067_01_jbsr-107-1-3186-g2.jpg
F2
It emphasized a tumour mass in the upper rectum which, after biopsy, was concluded to be a microsatellite stable BRAF-wild-type adenocarcinoma displaying KRAS-mutations (12ASP). 18F-FDG PET-CT staging revealed focal uptake in the upper rectum (Figures 1 and 2), with only one distant, 35-mm metastatic lesion in the anterior lateral segment of the liver (Figure 3).
Coronal plane; A- CT image revealing the rectal and liver lesions; B- PET image; C- Fused PET-CT image.
jbsr-107-1-3186-g3.jpg
PMC10348067_01_jbsr-107-1-3186-g3.jpg
F3
It emphasized a tumour mass in the upper rectum which, after biopsy, was concluded to be a microsatellite stable BRAF-wild-type adenocarcinoma displaying KRAS-mutations (12ASP). 18F-FDG PET-CT staging revealed focal uptake in the upper rectum (Figures 1 and 2), with only one distant, 35-mm metastatic lesion in the anterior lateral segment of the liver (Figure 3).
Axial plane; A- Diffusion-weighted MRI image with a b value of 1000; B- Fused PET-CT image; C- T2-weighted MRI.
jbsr-107-1-3186-g4.jpg
PMC10348067_01_jbsr-107-1-3186-g4.jpg
F4
Abdominal-pelvic MRI with DWI with a b value of 1000 revealed the lesions identified by 18F-FDG PET-CT; however, it further identified numerous affected lymphatic nodules and another suspicious 12-mm lesion with restricted diffusion in the left medial segment of the liver (Figure 4A). This lesion was consistent with another hepatic metastasis that had not been identified by 18F-FDG PET-CT (Figure 4B). The lesion was barely visible on the T2-weighted sequences due to its isointense signal (Figure 4C).