Recently Described Entity of Intracholecystic Papillary Neoplasm of Gallbladder with Coexisting Xanthogranulomatous Cholecystitis: an Unusual Association.

Intracholecystic papillary neoplasm (ICPN) of the gallbladder is a relatively new concept and is suspected to share clinicopathologic features with intraductal papillary mucinous neoplasm (IPMN) of the pancreas and intraductal papillary neoplasm of the bile duct (IPNB). The literature on the clinicopathologic characteristics of preinvasive intraepithelial neoplasms of the gall bladder is fairly limited, partly owing to variability in its definition and terminology. We report an extremely rare case of coexistent xanthogranulomatous inflammation and intracholecystic tubulo-papillary neoplasm with low-grade dysplasia in a 48-year-old male patient. Although there are many case reports of simultaneous carcinoma gallbladder with xanthogranulomatous cholecystitis (XGC), however, the association of ICPN with XGC has not been previously described. To the best of our knowledge, this is the first case report of ICPN of gallbladder coexisting with xanthogranulomatous cholecystitis.