Intra-ampullary papillary–tubular neoplasm

Intra-ampullary papillary–tubular neoplasms (IAPN) are precancerous neoplasms of the ampulla of Vater.^[1] On histological examination the neoplasms exhibit both papillary and tubular features.^[2]

Intra-ampullary papillary–tubular neoplasm
Other names	Intra-ampullary papillary tubular neoplasm, intra-ampulla papillary–tubular neoplasm, IAPN
Specialty	Gastroenterology, oncology

IAPN were first described in 2010.^[1] They are rare; comprising 0.5% of gastrointestinal tumours.^[1]

See also

• Duodenal cancer
• Intraductal papillary mucinous neoplasm