title: Air in the main pancreatic duct associated with a pancreatic intraductal papillary mucinous neoplasm.
abstract: A 62-year-old man was referred to our hospital after ultrasonographic mass screening detected a pancreatic cyst that proved to be an intraductal papillary mucinous neoplasm. Computed tomography additionally demonstrated air in the main pancreatic duct. Magnetic resonance cholangiopancreatography and endoscopic retrograde cholangiopancreatography delineated a filling defect in the main pancreatic duct in the body of the pancreas. The sphincter of Oddi was open. The main pancreatic duct was dilated by viscous mucin; air in the duct was attributed to consequent dysfunction of the sphincter. Laboratory findings included no significant abnormality. The patient has remained asymptomatic during follow-up. Of 25 previously reported cases with air in the duct, only 1 involved an intraductal papillary mucinous neoplasm.
authors.affiliation: Department of Gastroenterology, Second Teaching Hospital, Fujita Health University, 3-6-10 Otobashi, Nakagawa-ku, Nagoya, 454-8509, Japan. y.3and4@diary.ocn.ne.jp.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yamamoto
authors.affiliation: Department of Gastroenterology, Second Teaching Hospital, Fujita Health University, 3-6-10 Otobashi, Nakagawa-ku, Nagoya, 454-8509, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Inui
authors.affiliation: Department of Gastroenterology, Second Teaching Hospital, Fujita Health University, 3-6-10 Otobashi, Nakagawa-ku, Nagoya, 454-8509, Japan.
authors.forename: Junji
authors.initials: J
authors.lastname: Yoshino
authors.affiliation: Department of Gastroenterology, Second Teaching Hospital, Fujita Health University, 3-6-10 Otobashi, Nakagawa-ku, Nagoya, 454-8509, Japan.
authors.forename: Hironao
authors.initials: H
authors.lastname: Miyoshi
authors.affiliation: Department of Gastroenterology, Second Teaching Hospital, Fujita Health University, 3-6-10 Otobashi, Nakagawa-ku, Nagoya, 454-8509, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Kobayashi
keywords: Air; Intraductal papillary mucinous neoplasm; Main pancreatic duct; Mass screening; Ultrasonography