胰腺实性假乳头状瘤的CT诊断(附16例报告)

目的 探讨胰腺实性假乳头状瘤(SPTP)的CT表现.方法 回顾性分析经手术病理证实且临床和CT资料完整的SPTP患者16例.结果 7例SPTP病灶位于胰头,4例位于胰体,3例位于胰尾,2例胰体尾部均受累,平均最大径7.40 cm.CT表现:平扫病灶呈囊性(3例)、实性(4例)或囊实混合性(9例).囊性病灶边界清楚,呈均匀或不均匀的低密度;实性病灶则呈软组织密度,内见少许散在的囊变区;囊实混合性病灶其囊变区和实性区大致相当,囊变区呈片状或蜂窝状.增强扫描中囊性病灶的囊壁在动脉期即开始强化,门静脉期强化更明显.实性病灶及囊实混合性的实性成分在动脉期仅为轻度强化,门静脉期强化程度增加,囊变区始终不强化.结论 SPTP的CT表现具有一定的特征性.

CT diagnosis of solid pseudopapillary tumor of the pancreas: a report of 16 cases

Objective To investigate the CT features of solid pseudopapillary tumor of the pancreas (SPTP). Methods Sixteen cases of SPTP proved by pathology were included. Their clinical data and CT images were retrospectively reviewed. Results Lesions located in the pancreatic head (n=7), body (n=4), tail (n=3) or body-tail (n=2) with the mean diameter of 7.40 cm. On plain CT scan, 3 lesions appeared cystic, 9 cystic-solid mixed, and 4 solid. Cystic lesions were well-defined, presenting as homogenous or heterogenous hypo-attenuation mass. Cystic-solid mixed lesions contained similar proportion of solid and cystic regions. Cystic regions showed patchy or alveolate pattern. Solid lesions were mainly composed of soft tissue with a few scattered cystic regions. After contrast administration, the wall of cystic lesion demonstrated more enhancement during portal phase as compared with arterial phase. The solid components in cystic-solid mixed lesion and solid lesion presented as mild enhancement during arterial phase and marked enhancement during portal phase. No enhancement was observed in cystic regions during both phases. Conclusion There are some typical CT features of SPTP.