A new approach for evaluating the resectability of pancreatic and periampullary neoplasms.
OBJECTIVE
To establish a new standard for assessing the resectability of pancreatic and periampullary tumors by the Medical Image Three-Dimensional Visualization System (MI-3DVS).


METHODS
Eighty cases of pancreatic and periampullary tumors were examined. The 64-slice multidetector CT (64-MDCT) images and patient data were processed by MI-3DVS. The main elements examined by MI-3DVS included tumor shape, size, and location; distribution of related vessels; luminal morphology of large vessels; distribution and morphology of the small peripancreatic veins; morphology, degree of dilation, and obstructive sites of bile and pancreatic ducts. Based on vascular characteristics of MI-3DVS findings, the cases were classified into five types. Type I and II were resectable, type III were potentially resectable or resectable with combined vascular resection and reconstruction, and type IV and V were unresectable. The outcome was then compared with corresponding CT angiography (CTA) analysis and actual surgical observations.


RESULTS
Among the 80 cases, MI-3DVS indicated that 60 were resectable and the remaining 20 were not. In contrast, CTA indicated 50 resectable cases and 30 unresectable cases. For 57 cases of pancreatic ductal carcinomas and all 80 cases periampullary tumors, MI-3DVS assessment yielded a positive predictive value of 100%, negative predictive value of 100%, a sensitivity of 100%, a specificity of 100%, and an accuracy of 100%. While CTA generated corresponding values of 96%, 60%, 80%, 90%, 82.5%. The overall differences between the two methods were significant (P < 0.05).


CONCLUSIONS
The new classification system is able to reliably assess the resectability of pancreatic and periampullary tumors.
Department of Hepatobiliary Surgery, Zhujiang Hospital, The Southern Medical University, Guangzhou 510282, Guangdong Province, PR China. fangch_dr@126.com
Chi-hua
CH
Fang
Wen
W
Zhu
Huaizhi
H
Wang
Nan
N
Xiang
Yingfang
Y
Fan
Jian
J
Yang
Xiaojun
X
Wang
Shi zheng
Sz
Zhong
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003138:Common Bile Duct Neoplasms / Q000098:blood supply / Q000145:classification* / Q000601:surgery*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D010190:Pancreatic Neoplasms / Q000098:blood supply / Q000145:classification* / Q000601:surgery*; D011300:Preoperative Care / Q000379:methods; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed