胰腺实性-假乳头状瘤的CT、MRI表现特征

目的探讨胰腺实性-假乳头状瘤（SPTP）CT及MRI表现特征及其病理基础。方法回顾性分析经手术病理证实的12例SPTP完整影像学资料,12例均接受CT平扫及CT三期增强扫描,其中5例接受MRI及MRCP检查。结果 12例CT平扫均为胰腺单发肿块,除1例实性肿块包埋于胰头内,其他各例均为体积较大囊实性肿块,其中囊性成分为主型6例,囊实性相仿型3例,实性成分为主2例。11例外生性生长,10例包膜完整、均匀,2例包膜局部模糊、粘连,5例见钙化,各例胰胆管均无梗阻性扩张。CT增强扫描实性成分及包膜均呈延迟强化方式,实性成分强化程度在三期中均明显低于胰腺实质,而包膜强化程度在门静脉期、延迟期高于胰腺实质。5例行MRI扫描,实性成分T1WI呈低信号、T2WI呈高信号的软组织信号,囊性成分类似于脑脊液信号,囊内出血表现为T1WI高、T2WI低特征性信号,由于出血程度和出血期龄不同,其信号强度变异较大,囊壁及间隔在T1WI和T2WI均为低信号,MRCP提示胰胆管受推压、移位,均无梗阻性改变。结论 SPTP的影像学表现具有较高的特征性,MRI更具显示包膜、肿瘤内出血及胰胆管受压移位的能力。

The Features of CT and MRI Findings on Solid Pseudopapillary Tumor of Pancreas(SPTP)

Objective To explore the CT and MRI characteristic manifestation of solid pseudopapillary tumor of pancreas(SPTP) and it's pathological findings.Methods Imaging findings in 12 patients with histopathologically proved SPTP were retrospectively analyzed.CT scanning was performed in 12 cases and MRI was performed in 5 cases respectively.Result All patients with single lesion manifested comparatively large cystic-solid mass on CT scanning except one solid mass in the head of pancreas,including 6 lesions of prid...