Intra-gastric Ectopic Splenic Tissue.

A 40-year-old man presented with a 3-year duration of intermittent upper abdominal pain. Gastroscopy and endoscopic ultrasonography revealed a tumor in the bottom of the stomach with a homogenous low echogenicity that originated from the gastric serosa. An abdominal contrast-enhanced computed tomography (CT) scan showed that a well-marginated ovoid mass was obviously enhanced homogenously in the arterial period and weakened slightly in the venous period. The diagnosis of a gastric stromal tumor was made. Laparoscopic resection of the gastric tumor was subsequently performed. Surprisingly, postoperative pathological examination of the mass showed the typical structure of a normal splenic tissue. To our knowledge, ectopic splenic tissue originating from the gastric serosa is reported for the first time, showing important clinical significance for the identification of gastric malignant tumors.