Methods:The peptic ulcers were diagnosed with B mode ultrasonography (US) at first in 53 patients and the malignant ulcers in 5 patients.

B mode ultrasonography was used to detect brachial artery cross sectional compliance (Csc). Volumic distensibility (VD). Csc and VD were parameter to reflect artery buffering function.

The results show that B-mode ultrasonography is of real value in the diagnosis of retroperitoneal tumors and also provides the important basis for deciding the method of clinical treatment.