caa a22 4500 605539979 CHVBK 20210128100909.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10396-014-0581-5 doi (NATIONALLICENCE)springer-10.1007/s10396-014-0581-5 A case of mucinous cystic neoplasm of the pancreas misdiagnosed as a pancreatic pseudocyst at the initial exam and resected after a 2-year follow-up [Elektronische Daten] [Takuya Ishikawa, Jun-ichi Haruta, Takeo Yamaguchi, Masao Doisaki, Tsuyoki Yama, Kentarou Murate, Shun Hattori, Fumihiro Hayakawa, Kenta Yamada, Jun Yashika] A 44-year-old woman was referred to our hospital because of a cystic lesion in the pancreatic body that was found by computed tomography (CT) as a result of a screening for impaired liver function after the patient presented with a high fever in 2011. Trans-abdominal ultrasonography (US) revealed a 33-mm unilocular cyst within the pancreatic body and a 5-mm hypoechoic mass in the pancreatic neck. Contrast-enhanced CT showed a slight enhancement around the cyst and a mild dilation of the main pancreatic duct, but neither septum nor nodule was detected inside. Contrast-enhanced endoscopic ultrasonography (CE-EUS) revealed a hyperechoic elevated lesion inside the cystic lesion without enhancement in the pancreatic body; CE-EUS also revealed a 5-mm homogeneous hypoechoic mass with a remarkable enhancement in the pancreatic neck with the use of Sonazoid® as a contrast medium. These lesions were diagnosed as a pancreatic pseudocyst and a neuroendocrine tumor (NET), respectively, and were followed up with periodic examinations. The cystic lesion showed contraction 6months after the initial exam. However, US revealed an enlargement of the cystic lesion to 40mm in diameter 2years after the initial exam, and EUS showed irregular thickening of the wall with a cyst-in-cyst appearance. The diagnoses of a mucinous cystic neoplasm (MCN) and a concomitant small NET were made after a distal pancreatectomy. We herein report a rare case of MCN that showed various morphological changes over 2years of observation. The Japan Society of Ultrasonics in Medicine, 2014 Mucinous cystic neoplasm nationallicence Pseudocyst nationallicence Pancreatic neuroendocrine tumor nationallicence Ishikawa Takuya Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut Haruta Jun-ichi Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut Yamaguchi Takeo Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut Doisaki Masao Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut Yama Tsuyoki Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut Murate Kentarou Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut Hattori Shun Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut Hayakawa Fumihiro Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut Yamada Kenta Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut Yashika Jun Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut Journal of Medical Ultrasonics Springer Japan 42/2(2015-04-01), 257-265 1346-4523 42:2<257 2015 42 10396 https://doi.org/10.1007/s10396-014-0581-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10396-014-0581-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ishikawa Takuya Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut NATIONALLICENCE 700 1- Haruta Jun-ichi Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut NATIONALLICENCE 700 1- Yamaguchi Takeo Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut NATIONALLICENCE 700 1- Doisaki Masao Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut NATIONALLICENCE 700 1- Yama Tsuyoki Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut NATIONALLICENCE 700 1- Murate Kentarou Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut NATIONALLICENCE 700 1- Hattori Shun Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut NATIONALLICENCE 700 1- Hayakawa Fumihiro Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut NATIONALLICENCE 700 1- Yamada Kenta Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut NATIONALLICENCE 700 1- Yashika Jun Department of Gastroenterology, Japanese Red Cross Nagoya Daiichi Hospital, 3-35 Michishita-cho, Nakamura-ku, 453-8511, Nagoya, Japan aut NATIONALLICENCE 773 0- Journal of Medical Ultrasonics Springer Japan 42/2(2015-04-01), 257-265 1346-4523 42:2<257 2015 42 10396