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The goal of the present study was to evaluate the predictive value of serum carbohydrate antigen 19 - 9 ( CA 19 - 9 ) in the diagnosis of malignant intraductal papillary mucinous neoplasms of pancreas ( IPMNs ) .
 serum, malignant intraductal papillary mucinous neoplasms, pancreas, IPMNs
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 serum, malignant intraductal papillary mucinous neoplasms, pancreas, IPMNs