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目的:探讨胰腺实性-假乳头状瘤(SPTP)的CT、MRI表现。方法:回顾性分析经手术病理证实的11例SPTP患者的影像资料。其中7例行CT平扫及增强检查,2例仅行CT增强检查,另外2例同时行CT增强、MRI平扫及增强检查。结果:8例肿瘤位于胰腺头颈部,2例位于胰腺体部,1例位于胰腺尾部。病灶均为圆形或类圆形,边缘规则,边界清晰;直径1.8～13.2cm,平均8.0cm。1例肿瘤以实性成分为主,2例以囊性成分为主,8例囊、实成分比例相仿。CT平扫肿瘤密度不均匀,动态增强后强化不均匀,包膜及实性成分呈渐进性强化,即动脉期呈轻中度强化,门静脉期强化程度高于动脉期,但均低于正常胰腺组织,囊性成分、钙化及出血均不强化。MRI平扫信号混杂,增强时呈不均匀中等度延迟强化。结论:SPTP是一种好发于年轻女性,体积较大,CT、MRI表现为囊实混合性、有完整包膜、延迟逐渐充填性强化的肿块,认识其特征性表现有助于术前做出正确诊断。
Objective: To investigate the CT and MRI features of solid pancreatic pseudopapillary tumor (SPTP). Methods: The imaging data of 11 SPTP patients confirmed by surgery and pathology were retrospectively analyzed. Among them, 7 cases underwent CT scan and contrast enhancement, while 2 cases underwent CT scan only. The other 2 cases underwent CT scan, MRI scan and contrast enhancement. RESULTS: Eight of the tumors were located in the head and neck of the pancreas, two in the body of the pancreas, and one in the tail of the pancreas. The lesions were round or oval, the rules of the edge, clear boundaries; diameter 1.8 ~ 13.2cm, an average of 8.0cm. One case of tumor was mainly composed of solid components, two cases were cystic components, and eight cases were cysts. The proportion of solid components was similar. CT scan uneven tumor density, enhanced dynamic heterogeneity, the envelope and solid ingredients were progressive enhancement, that was mild to moderate arterial phase enhancement, portal vein phase enhancement was higher than the arterial phase, but were lower than the normal pancreas Tissue, cystic components, calcification and bleeding are not enhanced. MRI plain scan signal mixed, enhanced when uneven medium delay enhancement. Conclusion: SPTP is a kind of tumor that occurs in young women with large volume, CT, MRI manifestations of cystic solidity, complete envelopment and delayed filling. It is helpful to know the characteristic manifestations before surgery Correct diagnosis.