目的　提高对右上腹占位病变定位诊断的准确性。材料与方法　对随机搜集的 36例右上腹巨大占位病变的CT资料进行分析。制定肿物相关瘤体中心及相关比值的标准并作为定位征象 ,观察肾脏移位方向及肿瘤与器官间界面的移行带改变。结果　肝源性肿瘤相关瘤体中心位于肝外 (10 0 % ) ,相关比值≤ 1/3 ,占 6 7.7% ,移行带模糊占 89.9% ;非肝源性肿瘤相关瘤体中心多位于肝内 (81.5 % ) ,相关比值≥ 0 .45 ,占 81.5 % ,移行带清楚占 95 .6 % ,少数病例可见脂肪线。肾上腺源性肿物多使肾脏向后向下移位 ;腹膜后源性肿物多使肾脏向前向内移位 ;肝源性肿物多使肾脏向后移位。结论　相关瘤体中心与相关比值是右上腹肝源性及非肝源性巨大占位病变的重要定位征象 ;肾脏移位方向及移行带的表现是右上腹肿物定位的重要辅助诊断征象。根据 4项观察可提高右上腹肿物的定位准确性。鉴别胸腔或腹部肿物定位征象是膈肌或膈肌脚的位置 Objective To improve the accuracy of localization diagnosis of occupying lesions in the right upper quadrant. Materials and Methods CT data of 36 cases of right upper quadrant lesions collected at random were analyzed. The criteria for tumor-associated tumor center and correlation ratios were established and used as orientation signs to observe the shift direction of the kidney and the transition zone of the tumor-organ interface. Results The center of liver-derived tumor-related tumors was located extrahepatic (100%), the correlation ratio was ≤ 1/3, accounting for 6 7.7%, and the transitional zone accounting for 89.9%; the centers of non-liver-derived tumor-related tumors were mostly located in the liver. (81.5 %), the correlation ratio ≥ 0 .45, accounting for 81.5%, the transitional belt clearly accounted for 95.6 %, and the fat line was visible in a few cases. Adrenal masses cause the kidneys to shift backwards; retroperitoneal tumors shift the kidneys forward and inward; liver-derived tumors shift the kidneys backward. Conclusions The correlation ratio between the relevant tumor centers and correlation ratios is an important localization sign of hepatic and non-hepatic giant space occupying lesions in the right upper quadrant; the direction of renal shift and the appearance of transitional bands are important diagnostic diagnostic markers for right upper abdominal tumor location. According to the four observations, the positioning accuracy of the right upper abdominal mass can be improved. Identification of chest or abdominal mass location signs is the location of the diaphragm or diaphragmatic foot