<prompt> Maximum progression to pancreatic carcinoma occurs in?Intraductal papillary mucinous neoplasmsPseudopancreatic cystSerous cystic neoplasmsMucinous cystic neoplasms  <response>: Ans. a Intraductal papillary mucinous neoplasmsRef: Robbins 9thpg 892-894; 8thpg 900-903A. Intraductal papillary mucinous neoplasmsIPMNs progress to an invasive cancerB. Solid-pseudopapillary neoplasmsUsually benignC. Serous cystic neoplasmsAlways benignD. Mucinous cystic neoplasms13rd associated with invasive adenocarcinoma 