Ahmed Mohamed Sabry, Sasaki Jun, Goryo Masanobu
Avian Dis. 2014 Sep;58(3):495-8. doi: 10.1637/10835-040114-Case.1.
Gastric duplication (choristoma) is a very rare anomaly in both humans and other animal species. We report herein a case of proventricular cystic choristoma in a 62-day-old broiler chicken. The broiler chicken was brought from the slaughterhouse to our laboratory after a pale-brown cystic structure closely attached to a thin, compressed spleen was identified. On necropsy, the cystic structure showed a clear mucinous fluid. Histopathologically, the cystic structure was lined by proventricular mucosa presenting in folds and sulci. Submucosal proventricular glands, consisting of secretory units and collecting tubules, occupied parts of the choristomal wall. The gastric mucosa lining the choristomal wall stained positive with periodic acid-Schiff stain, stained negative with Alcian blue staining, and showed a thin layer of smooth muscle fibers and a thick connective tissue layer with Masson trichrome. Ectopic pancreas was noticed attached to the wall of the choristoma. To the best of our knowledge, this represents the first report of choristoma in an avian species.
胃重复畸形（迷芽瘤）在人类和其他动物物种中都是非常罕见的异常情况。我们在此报告一例62日龄肉鸡的前胃囊性迷芽瘤病例。这只肉鸡从屠宰场送来我们实验室，此前发现一个浅褐色囊性结构紧密附着于一个薄而受压的脾脏。尸检时，囊性结构内可见清亮的黏液性液体。组织病理学检查显示，囊性结构内衬前胃黏膜，呈褶皱和沟状。由分泌单位和集合小管组成的黏膜下前胃腺占据了迷芽瘤壁的部分区域。衬于迷芽瘤壁的胃黏膜过碘酸希夫染色呈阳性，阿利新蓝染色呈阴性，用马松三色染色显示有一层薄的平滑肌纤维和一层厚的结缔组织层。在迷芽瘤壁上发现有异位胰腺附着。据我们所知，这是禽类物种中迷芽瘤的首例报告。
