Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea.
J Gastroenterol Hepatol. 2011 Sep;26(9):1441-6. doi: 10.1111/j.1440-1746.2011.06764.x.
Ectopic pancreas is a common submucosal lesion in the stomach, but its histological diagnosis is usually difficult when tissue samples are obtained with a conventional biopsy forceps. The aim of this study was to describe the endosonographic features of gastric ectopic pancreas.
We retrospectively analyzed a database of all patients who underwent endoscopic ultrasonography (EUS) at Pusan National University Hospital from July 2006 to August 2010. A total of 26 patients with histologically confirmed ectopic pancreas were included in the study. The EUS features of their lesions were analyzed.
Ten lesions were located in the antrum, and 16 lesions were located in the body. Nine lesions (34.6%) showed an umbilication or central dimpling on the surface, and a mural growth pattern was most commonly observed (61.5%). Twenty-four lesions (92.3%) showed hypoechoic echogenicity, and 13 lesions (50.0%) were heterogeneous. The borders were indistinct in 16 lesions (61.5%) and lobulated margins were observed in 16 lesions (61.5%). Anechoic cystic or tubular structures appeared in 17 lesions (65.4%), and 20 lesions (76.9%) involved two or more sonographic layers.
The characteristic EUS features of ectopic pancreas are indistinct borders, lobulated margins, presence of anechoic duct-like structures, a mural growth pattern, and localization within two or more layers. These EUS features are potentially useful for differentiating ectopic pancreas from other mesenchymal tumors in the stomach.
异位胰腺是胃内常见的黏膜下病变，但通过常规活检钳获取组织样本时，其组织学诊断通常较为困难。本研究旨在描述胃异位胰腺的内镜超声特征。
我们回顾性分析了 2006 年 7 月至 2010 年 8 月期间在釜山国立大学医院接受内镜超声检查的所有患者的数据库。共有 26 例经组织学证实的异位胰腺患者纳入本研究。分析了他们病变的内镜超声特征。
10 个病变位于胃窦部，16 个病变位于胃体部。9 个病变（34.6%）表面呈脐凹或中央凹陷，最常见的生长方式为向腔外生长（61.5%）。24 个病变（92.3%）呈低回声回声，13 个病变（50.0%）呈不均匀回声。16 个病变（61.5%）边界不清，16 个病变（61.5%）呈分叶状边缘。17 个病变（65.4%）出现无回声囊性或管状结构，20 个病变（76.9%）累及两个或更多个超声层。
异位胰腺的特征性内镜超声特征为边界不清、分叶状边缘、存在无回声管状结构、向腔外生长方式以及定位于两个或更多个层内。这些内镜超声特征有助于将异位胰腺与胃内其他间质性肿瘤相鉴别。
