Abstract
Endascoptc ultrasound (EUS) -guided needle biopsy was performed on a 55-year-oldman with an extragastric leiomyosarcoma. The apparatus used was newly developedprototype endoscopic u.ltrasound tranducer PR192 (Toshiba Co., Tokyo, Japan) and biopsyneedle designed far the purpose of perfarming EUS-guided puncture. The presumptive diagnosis of the solid and cystic tumor anterior to the pancreas andposterior to the stomach could be made by conventional cross-sectional imaging modalitiesand angiagraphy, but histological comfirmation was still required, EUS revealed thecontinuity between gastric mural architechture and the tumor, and the specimen obtainedby following EUS-guided needle biopsy comfirmed leiomyogenic tumor microscopically.The resected specimen comfirmed leornyosarcama. Thus, the difficulties in determiningaccurate diagnostic criteria for leiomyogenic tumors are well known, EUS-guided needlebiopsy will assist the assessment in cases of diagnostic difficulties. These apparatusshoa-ed goad maneuverability during the procedure.
