Staging of Primary Abdominal Lymphomas: Comparison of Whole-Body MRI with Diffusion-Weighted Imaging and 18F-FDG-PET/CT
Table 4
Staging by both techniques: mismatched sites behind differences in staging with respect to standard of reference.
Patient
WB-DW-MRI
18F-FDG-PET/CT
18F-FDG-PET
Mismatched regions
Gold standard
Gastric MAL
0
0
0
Primary gastric lesion
Stage I. Positive EUB and endoscopy (ulcerated gastric lesion)
Gastric MAL
0
0
0
Primary gastric lesion
Stage I. Positive endoscopy
Intestinal MAL
II
II
0
Primary intestinal lesion, mesenteric lymph nodes
Stage II. Positive CT scan, thickened bowel wall and mesenteric lymph nodes. Radiological and clinical follow-up (partial remission after therapy on 18F-FDG-PET/CT and WB-DW-MRI)
Gastric MAL
II
II
0
Primary gastric lesion, mesenteric, paragastric, para-aortic, and paracaval adenopathy
Stage II. Positive endoscopy. 18F-FDG-PET/CT (only on CT) and WB-DW-MRI detected adenopathy but failed to find the primary lesion 18F-FDG-PET negative
Intestinal DLBC
IV
III
III
Bone marrow involvement
Positive bone marrow biopsy
MALTL, mucosa-associated lymphoid tissue lymphoma; DLBCL, diffuse large B-cell lymphoma.
