胰腺炎性假瘤的影像学表现3例报告并文献复习

目的　探讨胰腺炎性假瘤的影像学表现 ,以提高对其认识。方法　复习 3例胰腺炎性假瘤的超声、CT表现 ,并与病理结果进行对照研究。结果　B超均表现为边界清楚、内部呈不均匀低回声之球形病灶 ;CT平扫 1例为低等混杂密度 ,1例为均匀等密度 ,另 1例为囊性伴新近出血 ;增强后 2例相当于延迟期扫描 ,显示病变实质有轻及中度强化 ,另 1例囊性病灶之囊壁于静脉期及延迟期有轻度强化。结论　胰腺炎性假瘤的影像表现与肿块内纤维化和炎细胞浸润程度有关 ,但缺乏特征性。当胰腺内出现单发肿块性病变时 ,应将其列入鉴别诊断范畴。

Imaging Findings of Inflammatory Pseudotumor of the Pancreas: Report of 3 Cases and Review of the Literature

Objective To evaluate the imaging appearances of inflammatory pseudotumor (IPT) of the pancreas and improve the recognition. Methods The US and CT findings of 3 patients with IPT of pancreas were reviewed and correlated with the pathologic findings. Results On US, well defined and heterogeneous hypoechoic masses were found in all cases. On non enhanced CT, soft tissue density masses were seen in 2 cases and a cystic mass with fresh hemorrhage was shown in 1 case. On delayed phase images of enhanced CT in the 3 cases, heterogeneous slight enhancement was observed. Conclusion The imaging appearances of IPT of the pancreas depend on the extent of fibrosis and inflammatory cells infiltration, but they are nonspecific. IPT should be included in the differential diagnosis when solitary mass lesion was seen in pancreas.