LAUSR

Abstract Rationale: Dieulafoy lesion (DL), a rare cause of gastrointestinal bleeding, is easily covered by blood scab formation on the mucous membrane for its small size, which makes it difficult to be identified under endoscope. In clinical practice, it is also very easy to miss gastric mucosa-associated lymphoid tissue (MALT) lymphoma that exhibits atypical early manifestations under gastroendoscope and is difficult to be diagnosed by routine superficial biopsy. Most patients only experience nonspecific dyspepsia symptoms. Patient concerns: A 68-year-old man suffering from repeated melena for 6 years arrived at our hospital. The patient had undergone gastroscopy and capsule endoscopy at other hospitals for several times and received symptomatic treatment, but his melena still continued to recur. At our hospital, the capsule endoscopy displayed that there existed large hemorrhage in the stomach, after which a gastrointestinal decompression tube was placed, so the bright red blood was drained. Subsequently, a sunken vascular malformation tissue in the anterior wall of the gastric fundus was observed under emergency endoscope. Pulsating blood flow appeared immediately after biopsy, and over-the-scope clip (OTSC) was quickly applied to stop the bleeding. Near the bleeding point, scar-like tissue that was surrounded by interrupted mucosa was discovered, and biopsy was performed at this site. Diagnosis: The diagnosis of DL and gastric MALT were determined by the digestive endoscopy and biopsy pathology. Interventions: With the diagnosis of DL and gastric MALT, the hemorrhagic spot was treated by OTSC. After the patient's condition was stable, anti-Helicobacter pylori treatment was performed. Outcomes: After the corresponding treatment, the 6-month follow-up revealed that the lymphoma was not completely cured, but no further bleeding occurred. There was no bleeding in the epigastric region and the patient was in good condition. Lessons: From endoscopy, it is easy to miss DL. When the hemostatic equipment is fully prepared, biopsy can be performed. After biopsy, pulsatile bleeding is convincing evidence for Dieulafoy disease. OTSC represents an effective and low-risk method for DL and it could replace surgery. Moreover, the mucosa surrounding Dieulafoy disease should be carefully observed to exclude coexisting diseases such as lymphoma or gastric cancer.