Mergo P J, Helmberger T K, Buetow P C, Helmberger R C, Ros P R
Department of Radiology, University of Florida College of Medicine, Gainesville 32610-0374, USA.
Radiographics. 1997 Mar-Apr;17(2):281-301. doi: 10.1148/radiographics.17.2.9084072.
Magnetic resonance (MR) imaging can aid in the detection and characterization of many pancreatic neoplasms. The MR imaging appearances of common pancreatic neoplasms such as ductal adenocarcinoma are well-known. However, MR imaging features of more unusual pancreatic neoplasms are not well understood. Such tumors include mucin-hyper-secreting carcinoma, serous microcystic neoplasm, mucinous macrocystic neoplasm, solid and papillary epithelial neoplasm, multiple cysts associated with von Hippel-Lindau disease, acinar cell carcinoma, pancreaticoblastoma, and endocrine neoplasms (eg, nonfunctioning islet cell tumors, insulinoma, and gastrinoma). In general, pancreatic neoplasms demonstrate high signal intensity on T2-weighted images; the signal intensity on T1-weighted images is more variable but is often intermediate or low. Gadolinium enhancement is often helpful in further characterizing pancreatic neoplasms. The gross and histologic features of pancreatic neoplasms are also not well-known. Correlation with the underlying pathologic features enhances understanding of the MR imaging characteristics of both common and unusual pancreatic neoplasms.
磁共振（MR）成像有助于许多胰腺肿瘤的检测和特征描述。常见胰腺肿瘤如导管腺癌的MR成像表现是众所周知的。然而，对于更罕见的胰腺肿瘤的MR成像特征，人们了解得并不多。这类肿瘤包括黏液高分泌癌、浆液性微囊性肿瘤、黏液性大囊性肿瘤、实性假乳头状上皮性肿瘤、与冯·希佩尔-林道病相关的多发囊肿、腺泡细胞癌、胰腺母细胞瘤以及内分泌肿瘤（如无功能性胰岛细胞瘤、胰岛素瘤和胃泌素瘤）。一般来说，胰腺肿瘤在T2加权图像上表现为高信号强度；T1加权图像上的信号强度变化更大，但通常为中等或低信号。钆增强通常有助于进一步明确胰腺肿瘤的特征。胰腺肿瘤的大体和组织学特征也鲜为人知。将其与潜在的病理特征相关联，有助于加深对常见和罕见胰腺肿瘤MR成像特征的理解。
