Table 1 Comparison of MR findings among malignant lymphoma, autoimmune pancreatitis and pancreatic adenocarcinoma
From: MR features of primary and secondary malignant lymphoma of the pancreas: a pictorial review
Finding | Lymphoma | AIP | PAC |
|---|---|---|---|
Speckled hyperintensity on FST1WIa | None | Sometimes‡ | Rare |
Target appearance on T2WIb | Rare | Rare | Frequent‡ |
Duct-penetrating sign (in focal lesions) | Rare | Sometimes‡ | Rare |
Marked upstream MPD dilatation | Sometimes | Rare | Frequent‡ |
Speckled enhancement on PP DCE-MRIc | None | Frequent | Rare |
Homogeneous enhancement on EP DCE-MRI | Sometimes | Common‡ | Rare |
Target appearance on PP or EP DCE-MRIb | Rare | Rare | Common‡ |
Without delayed enhancement | Frequent* | Rare | Rare |
Diffuse enlargement (sausage appearance) | Sometimes | Sometimes‡ | Rare |
Capsule-like rim (in diffuse lesions) | Rare | Frequent‡ | None |
Multi-focal lesions | Sometimes | Sometimes | None |
Vascular involvement without obstruction | Sometimes† | Sometimes | Rare |
Lymphadenopathy below the level of the left renal vein | Sometimes† | Rare | Rare |
Other organ involvement | None (primary)/common (secondary) | Common‡ | Sometimes (metastasis) |