Nishihara K, Kawabata A, Ueno T, Miyahara M, Hamanaka Y, Suzuki T
Department of Surgery II, Yamaguchi University School of Medicine.
Hepatogastroenterology. 1996 May-Jun;43(9):714-20.
BACKGROUND/AIM: The usefulness of magnetic resonance imaging (MR imaging) in the differential diagnosis of cystic lesions of the pancreas was assessed.
Pseudocyst was present in 9 patients, retention cyst in 4, simple cyst in 2, serous cystadenoma in 1, mucinous cystadenoma in 6, mucinous cystadenocarcinoma in 6. The relative signal intensity (SI) of each cystic lesion on MR imaging was assessed in comparison with that of the liver.
It was difficult to distinguish the cystic types from each other based on the SI on MR images. Insofar as mucinous cystic tumors, those containing gelatinous mucin showed higher SI on T1-weighted images than those containing mucinous but watery fluid. five of the 6 mucinous cystic tumors containing gelatinous mucin were histologically malignant, whereas all except one those containing watery fluid were benign.
Our results suggest that the SI on T1-weighted images may be useful in distinguishing malignant from benign mucinous cystic tumors.
背景/目的：评估磁共振成像（MRI）在胰腺囊性病变鉴别诊断中的作用。
9例患者存在假性囊肿，4例为潴留性囊肿，2例为单纯性囊肿，1例为浆液性囊腺瘤，6例为黏液性囊腺瘤，6例为黏液性囊腺癌。在MRI上，将每个囊性病变的相对信号强度（SI）与肝脏的信号强度进行比较评估。
根据MRI图像上的SI难以区分囊肿类型。就黏液性囊性肿瘤而言，含有胶冻状黏液的肿瘤在T1加权图像上的SI高于含有黏液但为水样液体的肿瘤。6例含有胶冻状黏液的黏液性囊性肿瘤中有5例在组织学上为恶性，而除1例之外，所有含有水样液体的肿瘤均为良性。
我们的结果表明，T1加权图像上的SI可能有助于区分黏液性囊性肿瘤的良恶性。
