胃异位胰腺的多排螺旋CT影像特点分析

Multi-slice spiral computed tomography features of gastric ectopic pancreas

目的总结胃异位胰腺(GEP)的多排螺旋CT(MSCT)影像特点。方法分析2016年7月至2019年3月邵逸夫医院收治的21例GEP患者的MSCT平扫及增强扫描图像,分析病灶大小、部位、生长方式、有无囊变及瘤周脂线;测量病灶CT值[平扫、动脉期、静脉期、强化比值(强化幅度/平扫CT值)],并分析各参数间的相关性。结果21例GEP病灶长径(20.80±11.44)mm,短径(15.14±5.96)mm,长径/短径比值1.34±0.25;多呈类圆形[12例(57.1%)],多位于胃体[12例(57.1%)],多呈腔外生长[12例(57.1%)];6例(28.6%)可见瘤周脂线;仅1例(4.8%)见囊变。GEP增强扫描呈渐进性强化模式,平扫CT值为(40.99±8.51)HU,动脉期CT值为(78.11±18.27)HU,静脉期CT值为(93.87±15.14)HU,强化比值1.41±0.75。平扫CT值与强化比值呈负相关(r=-0.74)。结论多排螺旋CT可很好地显示GEP大小、部位、生长方式、囊变、瘤周脂线及强化特点等,有利于指导临床诊疗。

Objective To analyze the multi-slice spiral computed tomography(MSCT)features of gastric ectopic pancreas(GEP).Methods The MSCT images of 21 patients with GEP admitted to Sir Run Run Shaw Hospital Affiliated to Medical College of Zhejiang University from July 2016 to March 2019 were reviewed.The size,location,growth pattern,cystic,peritumoral fat-line of the lesions were included.The CT value was measured including the phase of pre-enhancement,artery phase,vein phase and the ratio between total enhancements and pre-enhancement CT values.Finally,the relationships among them were performed.Results The long diameter was(20.80±11.44)mm,short diameter(15.14±5.96)mm,ratio between long and short diameter 1.34±0.25;GEP was usually in an ovoid shape[12(57.1%)],located in gastric body[12(57.1%)],in a exoluminal growth pattern[12(57.1%)].Peritumoral fat-line was seen in 6 patients(28.6%),and a cyst was seen in one patient(4.8%).GEP was presented with persistently enhancing(progressive)pattern.Pre-enhancement CT values was(40.99±8.51)HU,artery phase(78.11±18.27)HU,vein phase(93.87±15.14)HU and the ratio between total enhancements and pre-enhancement CT values 1.41±0.75.Pre-enhancement CT values had a negative relationship with the ratio between total enhancements and pre-enhancement CT values with a correlation coefficient of-0.74.Conclusions MSCT could well display the size,location,growth pattern,cystic,peritumoral fat-line and enhancement characteristics of GEP,which is helpful with clinical practice.