Introduction: Gastric tumor is relatively common disease entity in day to day radiologicrnpratice.Gastric cancer acounts for the majority of gastric neoplasm followed by GIST andrngastric lymphoma. Imaging plays a vital role in diagnosis and staging of gastric neoplasmrnparticularly gastric cancer.Computed tomography remains the most common and widespreadrntool for the staging of the diseasesrnThe role of computed tomography in the study of gastric carcinoma is mainly for preoperativernlocal and distant staging; post-therapeutic control and follow-uprnMethod: The study was conducted at TASH ,Addis Ababa ,Ethiopia from September 2019 tornAugust 2020.Hospital based retrospective cross sectional study was conducted to address thernspecific objective during study period. The Study was conducted among patients being evaluatedrnat Tikur Anbessa Specialized Hospital oncology department who have both MDCT resultrnreported by senior radiologist and pathology result . Data was collected by evaluating the rnMDCT report and biopsy result from pathology and oncology department by using structuredrnquestionnaires. The data was checked for clarity and completeness. Computerized data analysisrnwas conducted by using SPSS version 20 software.rnResult: Total of 80 gastric tumor patients were evaluated .66(82.5%) were gastric cancerrn,12(15.5%) were gastric GIST and 2(2.5%) were primary gastric lymphoma. The age range ofrngastric cancer were 25 to 85 years with mean age of 52.6 year.The mean age of GIST was 54rnyear and the age range of the 2 lymphoma were 35 to 54 years.56.7 % of gastric cancer werernmen and 66 % of GIST were men. This study showed that 56 % of gastric cancer werernintestinal histologic type, 33. 4 % were diffuse histologic type and 10.6% were indeterminate rnhistologic adenocarcinoma .Acuracy of MDCT for staging T4 tumor is 90.9% and 44.5 % forrnT3 .rnConclusion: MDCT has relatively high diagnostic sensitivity and specificity for detection andrndiagnosis of gastric tumor .It has high acuracy to differentiate gastric GIST from other gastricrntumor . MDCT has high acuracy for correctely staging T4 tumor but it had relatively low rnacuracy of staging T2, T3 tumor and nodal staging