Matsushita M, Hajiro K, Okazaki K, Takakuwa H
Department of Gastroenterology, Tenri Hospital, Nara, Japan.
Gastrointest Endosc. 1999 Apr;49(4 Pt 1):493-7. doi: 10.1016/s0016-5107(99)70049-0.
Histologic diagnosis of aberrant pancreas is usually difficult when tissue samples are obtained with a standard biopsy forceps. The aim of this study was to describe the endosonographic (EUS) features of gastric aberrant pancreas.
EUS was performed in 10 patients with aberrant pancreas before resection. EUS features of the lesions were analyzed and compared with resected specimens retrospectively.
EUS in 5 lesions (50%) demonstrated the ectopic pancreatic tissue as located in the third and fourth sonographic layers (submucosa and muscularis propria) and in the third layer (submucosa) in the other 5 lesions. The margin appeared for the most part indistinct (80%) because of the lobular structure of the acinous tissue. The internal echo pattern in all cases was heterogeneous, mainly a hypoechoic image (acinous tissue) accompanied by scattered small hyperechoic areas (adipose tissue). An anechoic area (duct dilatation) (80%) and fourth-layer thickening (muscular hypertrophy) (80%) were commonly visualized.
Gastric aberrant pancreas has characteristic EUS features that correlate with specific histologic components and is variable with regard to sonographic layer of origin.
当使用标准活检钳获取组织样本时，异位胰腺的组织学诊断通常很困难。本研究的目的是描述胃异位胰腺的内镜超声（EUS）特征。
对10例异位胰腺患者在切除术前进行EUS检查。回顾性分析病变的EUS特征，并与切除标本进行比较。
5个病变（50%）的EUS显示异位胰腺组织位于超声图像的第三和第四层（黏膜下层和固有肌层），另外5个病变位于第三层（黏膜下层）。由于腺泡组织的小叶结构，大部分边缘不清晰（80%）。所有病例的内部回声模式均不均匀，主要为低回声图像（腺泡组织）伴有散在的小高回声区（脂肪组织）。通常可见无回声区（导管扩张）（80%）和第四层增厚（肌肉肥大）（80%）。
胃异位胰腺具有与特定组织学成分相关的特征性EUS表现，并且在超声起源层面上存在差异。
