Abstract. Isolated gastric varices (IGV) (resulting from varying etiologies) were diagnosed in six patients using ultrasound examination of the wall of the fluid-filled stomach. Small gastric varices are seen as circular or linear anechoic channels within the gastric wall without a significant intraluminal projection. Large varices are seen as anechoic, lobulated "bulging masses" projecting into the fluid-filled lumen of the stomach. Doppler technique assists in confirming the vascular nature of these lesions and thus avoids confusion with other hypoanechoic lesions of the gastric wall. The technique is simple, noninvasive, and extremely useful in diagnosing IGV in patients investigated for recurrent undiagnosed gastrointestinal bleeding.Key words: Isolated gastric varices, US--Doppler techniques.The detection of isolated gastric varices (IGV) remains a diagnostic challenge. The accuracy of barium studies for detecting IGV ranges from 14-74% [1, 2] depending upon the radiologic criteria used to make the diagnosis. The reliability of endoscopy in diagnosing gastric varices, though poorly documented, is far from satisfactory [3]. Until recently splenoportovenography (SPVG) has been the investigation of choice for detecting isolated gastric varices, as well as for demonstrating its etiology. However, it is slowly being replaced by less invasive procedures, such as arterioportography [4]. Although IGV have been detected on computed tomography (CT) [5], its high cost, poor accuracy, and the use of ionizing radiation make it unsuitable for screening patients suspected of having isolated gastric varices. We describe a new technique employing the fluidfilled stomach as a window to detect IGV aided by flow detection through the Doppler technique.
Materials and MethodsBetween October 1990 and June 1991, IGV were diagnosed in six patients (four males and two females) at our institution. These patients ranged from 12-58 years in age. Four of the six patients were investigated for recurrent undiagnosed gastrointestinal bleeding, whereas the other two had splenomegaly. Causes for the IGV in these patients included portal vein thrombosis (two patients), splenic vein thrombosis (two patients), noncirrhotic portal fibrosis (one patient), and liver cirrhosis (one patient).Real-time sonography was performed in all patients using a variety of convex and sector transducers ranging in frequency from 3.5-7.5 MHz (Sonoline AC, Siemens Inc. Ltd). In all patients, duplex Doppler sonography was performed using the same equipment. Detection of these variceal channels within the gastric wall was facilitated by employing the technique advocated by others to assist detection of gastric wall [7] and pancreatic head lesions [8] using the fluid-filled stomach as a sonographic window.Apart from abdominal sonography, endoscopic examination of the esophagus and stomach was performed in all patients. The presence of the IGV detected on abdominal sonography was confirmed by a SPVG in all patients.After a routine upper abdominal sonography, the fasting...