目的探讨胰腺实性假乳头状瘤 （SPTP）的CT表现。方法 回顾分析9例经 病理证实为SPTP的临床及CT资料。结果 SPTP均为边界清晰的单发外突性肿块，平 均最大径7.01cm。病灶均见完整包膜，2 例可见壁结节，包膜、壁结节呈“渐进性 强化”。囊性病灶2例，呈较均匀的低密 度，1例见钙化及纤维分隔；囊实性4例， 病灶囊、实性比例大致相当，1例见钙 化。实性3例，以软组织密度为主，内见 少量散在囊变。肿瘤实质动脉期为轻-中 度强化，静脉期进一步强化且较均匀，强 化范围增大，延迟期呈均匀的持续强化； 囊性病灶及病灶的囊变未见强化。结论 SPTP的CT表现具有一定特征，MSCT平扫及 多期增强有助于诊断。

Objective To explore the CT features of solid pseudopapillary tumor of the pancreas (SPTP). Methods 9 cases of SPTP proved by pathology were included, and their clinical and CT data were analyzed retrospectively. Results All SPTP represented protruding single masses with clear boundary, the mean diameter was 7.01 cm. Complete capsule was seen in all lesions, 2 lesions with mural nodule, capsule and mural nodules showed the feature of "progressive enhancement". 2 lesions appeared cystic, presenting as homogenous low density mass, 1 lesion with calcification. 2 lesions appeared Cysticsolid mixing, presenting as similar proportion of solid and cystic regions, 1 lesion with calcification. 3 lesions appeared cystic-solid were mainly composed of soft tissue with a few scattered cystic regions. Essence of tumor showed low-grade or medium enhancement in arterial phase, and appeared to further and more uniform enhancement with greater range in venous phase, essence continued to enhance homogeneously in delay period. No enhancement was seen in cystic regions and cystic lesions. Conclusion There were some typical CT features of SPTP, Non-enhanced and multiphase contrastenhanced CT scanning were useful to its diagnosis.