ABSTRACT
Objective To investigate the clinical X-ray features and diagnostic criteria of multiple primary cancer of upper digestive tract (MPCUDT) as well as its pathogenesis ,and to analyze the causes of X-ray missed or mistaken diagnosis and to put forward the corresponding way of solutions.Methods X-ray findings of MPCUDT proved pathologically were retrospectively analyzed.Results (1)This disease mostly occurred in males .Male/Female=3.25/1. 88% of the patients were older than 50 years ;(2)78.8% of the cases with multiple primary cancer of esophagus were mostly distributed in upper and middle section ,72.2% of the cases with esophagogastric multiple primary cancer were distributed in middle and lower section of esophagus or cardiac part ;(3)The X-ray features of multiple primary cancer were the same as that of single ones .The patients with early carcinoma accounted for 14.5% of all cases , advanced carcinoma 85.5% ;(4)The rate of missed diagnosis was as high as 32.3%.Conclusion X-ray imaging has great value for the diagnosis of MPCUDT.