Accessory spleen originating from the intrinsic muscularis of the stomach misdiagnosed as gastrointestinal stromal tumor: a case report.
A 34-year-old man presented to our hospital with a 2-month history of repeated dull upper abdominal pain. Gastroscopy and endoscopic ultrasonography indicated a hemispherical mass at the junction of the greater curvature and the gastric fundus, with hypoechogenicity originating from the intrinsic muscular layer. He was diagnosed with a gastric body submucosal lesion and gastrointestinal stromal tumor, and underwent endoscopic full-thickness resection. However, postoperative pathological examination of the mass unexpectedly revealed heterotopic spleen tissue (accessory spleen). Intragastric ectopic spleen tissue originating from the intrinsic muscular layer of the stomach is a rare clinical condition, with no specific clinical symptoms. This finding is of great clinical significance for the identification of gastric submucosal tumors.
['Zhang|Jing|J|https://orcid.org/0000-0001-9899-4549', 'Zhong|Jin-Wei|JW|', 'Lu|Guang-Rong|GR|', 'Zhou|Yu-Hui|YH|', 'Xue|Zhan-Xiong|ZX|', 'Ye|Meng-Si|MS|']
D000328:Adult D003951:Diagnostic Errors D005753:Gastric Mucosa D046152:Gastrointestinal Stromal Tumors D005773:Gastroscopy D006801:Humans D008297:Male D013154:Spleen D013274:Stomach Neoplasms D016896:Treatment Outcome
Accessory spleen gastrointestinal stromal tumor gastroscopy endoscopic ultrasonography gastric body submucosal lesion ectopic splenic tissue