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Yang-Yuan Chen

Publications and source records attributed to Yang-Yuan Chen.

16 recordsLinked to original sources

Solitary gastric melanotic schwannoma: sonographic findings.

Solitary gastric schwannoma is rare, and solitary melanotic schwannoma is even rarer, posing a dilemma in diagnosis and treatment. We report the case of a 69-year-old woman with gastric melanotic schwannoma who presented with nausea, vomiting, and abdominal pain. Abdominal sonographic examination revealed a 5-cm hypoechoic mass in the epigastric area that was confirmed to be a gastric submucosal tumor on endoscopic examination. The diagnosis of melanotic schwannoma was confirmed via sonographically guided percutaneous core biopsy. The tumor was resected, and no recurrence has occurred in a 3-year follow-up.

Aged↗

Hemoclip-assisted polypectomy of large duodenal Brunner's gland hamartoma.

Brunner's gland hamartoma, also known as Brunneroma or Brunner's gland adenoma, is a rare tumor of the duodenum and an uncommon cause of gastrointestinal bleeding. In symptomatic patients, treatment requires either surgical resection or endoscopic polypectomy. We report a case of upper gastrointestinal bleeding from a pedunculated Brunner's gland hamartoma in the duodenal bulb. A new technique using hemoclip-assisted polypectomy is described to remove a large pedunculated Brunner's gland hamartoma.

Aged↗

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Arteriovenous Malformations↗

Preoperative diagnosis of colonic angiolipoma: a case report.

Angiolipoma, a common benign tumor mostly seen in the subcutaneous tissue, is a rare pathological condition in the gastrointestinal tract that is usually diagnosed postoperatively. In this case report, an angiolipoma was diagnosed preoperatively by imaging (including CT scans, abdominal echo, barium enema, and colonoscopy). This pathology was confirmed postoperatively. Computed tomography scan, abdominal echo, and barium enema images were presented.

Aged↗

Monopolar coagulation versus conventional endoscopic treatment for high-risk peptic ulcer bleeding: a prospective, randomized study.

BACKGROUND: Severe upper GI hemorrhage from an actively bleeding peptic ulcer is sometimes difficult to treat by conventional endoscopic means, such as multipolar electrocoagulation, heat probe coagulation, and injection therapy. It was hypothesized that monopolar coagulation with a "hot biopsy" forceps may be more effective in such cases. METHODS: A prospective, randomized trial was performed to assess the safety and short-term efficacy of monopolar coagulation versus conventional treatment (combination heat probe coagulation and injection therapy) in the treatment of patients with various types of actively bleeding or high-risk ulcers. RESULTS: Primary hemostasis was achieved in 54 of 56 actively bleeding patients in the monopolar coagulation group. In contrast, primary hemostasis was achieved in 33 of 43 patients in the control group (p = 0.003), with 8 of the remaining 10 being treated successfully by crossover monopolar coagulation. During 30-day follow-up, bleeding recurred in 6 patients in the conventional therapy group versus none in the monopolar coagulation group (p = 0.012). Post-endoscopy blood transfusion requirements were lower in the monopolar coagulation group. Mortality and surgery rates were zero in both groups. There was no procedure-related complication. CONCLUSIONS: This study demonstrated improved primary hemostasis and a reduced short-term rate of recurrent bleeding for patients with actively bleeding and high-risk non-bleeding peptic ulcers treated by monopolar coagulation. The complication rate associated with monopolar coagulation was low.

Duodenal Ulcer↗