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Abstracts Methods: STUDY DESIGN: Retrospective and prospective crosssectional descriptive study. METHODOLOGY: Ethical clearance was obtained from the Research Committee of Mengo Hospital. Consecutive patients referred for abdominal ultrasound with a diagnosis of HIV/AIDS from July 2005 to January 2006 were recruited. The sample size is 100 patients. The sonographic changes in the abdomen were recorded. Masses and fluid collection and abnormal physiology were documented. Histological and microbial proof obtained using ultrasound guided biopsy of the lesions were also documented. Results: All patients who were referred had abnormalities. The male to female ratio was 4:3. The age range was 3 to 75 years and the mean age was 32 years. Commonest organs involved were liver 84.4%, kidney 67%, spleen 44.8%, lymph nodes 39.7%, gallbladder 37.9%, alimentary tract 31%, peritoneum 25.9%, bile duct 21% and vessels and pancreas 7%. Unique findings included gastrointestinal, biliary duct, gallbladder and vascular changes as well as high prevalence for TB. Conclusions: Patients with HIV/AIDS almost always have ultrasound pathology. The ultrasound findings may be characteristic or nonspecific. The hepatobiliary system and the kidneys were the commonest organs involved. Tuberculosis is the commonest comorbidity in HIV/ AIDS in our environment 3003 Effect of transabdominal ultrasound in preoperative staging of gastric cancer Sato M, Hata J, Haruma K, Kusunoki H, Kamada T, Tanaka T, Ishii M, Kawasaki Medical University, Japan Objectives: The therapeutic strategies for patients with gastric cancer differ depending on their stages. However, most of the modalities available for the staging of cancer are invasive. In contrast, transabdominal ultrasonography (US), is regarded as a noninvasive method. The aim of this study was to clarify the diagnostic ability of US in preoperative staging of gastric cancer. Methods: Seventy-three patients with gastric cancer who had undergone US before treatment were enrolled in this study. Forty-six had early gastric cancer and 27 had advanced cancer. Detection of cancer lesion, depth of tumor invasion , lymph node metastasis and distant metastasis were evaluated with US. The US systems (SSA-770A; Toshiba Co., Tokyo, Japan) equipped with 3–7.5 MHz transducers were employed. Results: Detectabilities of early gastric cancer and advanced cancer were 47.8 % and 92.6 %, respectively. The accuracy for diagnosing tumor invasion is 77.3% (17/22) in early gastric cancer, 72.0% (18/25) in advanced gastric cancer. Tumor stage grouping (TNM classification) of advanced gastric cancer was correctly decided in 68.0% (17/25). Difficulty in accurate diagnosis of lymph node metastasis was the major cause for mis-staging. Conclusions: US can be a useful modality in both the detection and preoperative staging of gastric cancer. 3004 4D ultrasound in some gastric diseases. Imaging decision Elwagdy S, Shehata AA, A-Azhar University Hospitals, Egypt; AAzhar University Hospitals-GIT Surgery, Egypt Objectives: To assess the value of 4D ultrasound in some gastric lesions; we practiced our method of gastric imaging to demonstrate some of gastric diseases, and compared to gastroscopic results. Methods: Using 4D Medison-Accuvix-XQ ultrasound machine. The study included 79 patients having full stomach with water after 12 hours food fasting. Results: For some patients with gastric troubles, 4D ultrasound provided an effective imaging evaluation. Many gastric diseases could be justified through 4D ultrasound, and correlated with the endoscopic findings for assessment of 4D ultrasound accuracy in this field. Diag-

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nostic sensitivity of gastric ulcers, either at the gastric body or pyloric antrum proved 62.8%. The specificity of diagnosis of neoplastic involvement of the stomach was 96.3%. Other gastric lesions such as gastric polyposis or congestive erosive gastritis proved accuracy up to 78.4%. The mentioned figures were in comparison with the results of gastroscopy. One case of very small pyloric polyp could be demonstrated by 4D ultrasound and missed in gastroscopy. Conclusions: 4D ultrasound imaging of the stomach can be used to demonstrate some gastric lesions, showing fairly good diagnostic confidence. It can be used mainly for patient’s selection before gastroscopy. This gives us hope that our final goal— easy diagnosis of gastric diseases— can be achieved. 3005 Ultrasonographic evaluation of neoplasms arising in the gastrointestinal tract: A pictorial review Kim J, Cho OK, Koh BH, Song SY, Kim Y, Heo J-N, Hanyang University Seoul Hospital, Korea; Hanyang University Guri Hospital, Korea Up to this day, transabdominal ultrasonography (US) is the preferred modality for primary evaluation of the abdomen in many institutions. Despite its use in acute abdomen, US is considered to have a more limited role in diagnosing neoplasms of the gastrointestinal (GI) tract. However, not only is US an easily accessible and noninvasive modality, it often allows differentiation of the anatomical layers of the bowel wall, a feature that helps when differentiating submucosal tumors from tumors arising in other layers of the wall. US also offers the advantage of real-time imaging, which may aid T staging of GI malignancies by means of manual compression. In the hands of an experienced sonographer, US may become a handy tool for evaluating neoplasms of the GI tract. The purpose of this review is to demonstrate the US features of various GI neoplasms and discuss the key features that are helpful for differential diagnosis. 3006 Sonographic features of a Peutz–Jeghers-like polyp Ijuin H, Tokitou D, Imamura S, Atuti Y, Arima T, Uegama I, Imamura K, Furukawa K, Nagamine M, Hirai K, Tenyoukai Chuuou Hospital, Japan; Hirai Clinic, Japan A 52-year old male was admitted to our hospital because of a diarrhea and melena. He was operated for in esophageal cancer at 50 years old. Transabdominal ultrasound showed a target sign (multiple concentric rings sign) in the pelvis and a polyp of 3 mm in size on its tip. This polyp had a tree-like structure on B-mode scan. Color Doppler and B-flow disclosed blood vessels distributed like arborization. It was a Peutz–Jeghers-like polyp of 4535 mm in size by the operation. Microscopically, the specimens of the tumor show arborizing smooth muscle, so called “tree-like branching”, separating hyperplastic and adenomatous colonic glands to the lobules. We report this case, because structure and dynamic blood flow of Peutz–Jeghers-like polyp was able to be shown clearly through transabdominal ultrasound. 3007 Blood flow analysis of bowel diseases by using color Doppler sonography Obata M, Iwasaki N, Okabe Y, Orino A, Kobe City General Hospital, Japan Objectives: To evaluate clinical usefulness of color Doppler sonography (CD) in diagnosing various bowel diseases. Methods: Two hundred fifty-six patients were studied: 148 had bacterial colitis (BC); 19, ischemic colitis (IC); 10, ulcerative colitis (UC);