Gastric schwannoma presenting with perforation and abscess formation: a case report and literature review.

Gastric schwannoma represent only 0.2% of all gastric tumors and 4% of all benign gastric neoplasms. They are usually asymptomatic but can present with variable symptoms. The authors report a case of a 29-year-old male patient who presented with fever and abdominal pain with epigastric mass. Pre-operative diagnosis was gastric lymphoma with perforation and an abscess formation. Hemigastrectomy with Billroth II anastomosis was performed The pathologic examination and immunohistochemical studies confirmed gastric schawannoma as the diagnosis. The post-operative course was uneventful. Gastric schwannoma are difficult if not impossible to diagnose preoperatively as endoscopic and radiologic findings are nonspecific. The treatment of choice is complete surgical resection because of diagnostic uncertainty and the long-term outcome is excellent. This is the first report of gastric schwannoma presenting with concealed perforation and an abscess formation. The literature was reviewed.