caa a22 4500 475752465 CHVBK 20180406123528.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/s005950070074 doi (NATIONALLICENCE)springer-10.1007/s005950070074 Lymphoepithelial Cyst of the Pancreas: Report of a Case [Elektronische Daten] [Yasuo Tsuchiya, Shohachi Suzuki, Takanori Sakaguchi, Yoshimitsu Kojima, Kazuya Okamoto, Kiyotaka Kurachi, Hiroyuki Konno, Satoshi Baba, Satoshi Nakamura] An extremely rare case of a lymphoepithelial cyst (LEC) of the pancreas is described herein. A pancreatic cystic tumor was initially detected in a 50-year-old man at a medical checkup. On admission, his serum carbohydrate antigen (CA) 19-9 level was 8 100 U/ml and a computed tomography scan revealed a well-circumscribed multilocular cystic tumor in the pancreatic head and body. Magnetic resonance cholangiopancreatography showed no communication between the pancreatic ducts and the tumor. A distal pancreatectomy with lymph node dissection was performed because the lesion was suspected to be a mucinous cystadenoma or cystadenocarcinoma of the pancreas. However, histological examination revealed that the cyst was lined by stratified squamous epithelium and surrounded by lymphoid tissue, thereby confirming the diagnosis of LEC of the pancreas. The superficial layer of squamous epithelium and the cystic contents were found to be immunohistologically positive for CA19-9. Establishing a preoperative diagnosis of LEC is quite difficult because it resembles other cystic neoplasms of the pancreas in radiographic features and is frequently associated with an elevation of serum tumor markers such as CA19-9. Springer-Verlag, 2000 Key Words Lymphoepithelial cyst nationallicence Pancreas nationallicence Tsuchiya Yasuo Department of Surgery II and aut Suzuki Shohachi Department of Surgery II and aut Sakaguchi Takanori Department of Surgery II and aut Kojima Yoshimitsu Department of Surgery II and aut Okamoto Kazuya Department of Surgery II and aut Kurachi Kiyotaka Department of Surgery II and aut Konno Hiroyuki Department of Surgery II and aut Baba Satoshi Department of Pathology II, Hamamatsu University School of Medicine, 3600 Handa-cho, Hamamatsu 431-3192, Japan, JP aut Nakamura Satoshi Department of Surgery II and aut https://doi.org/10.1007/s005950070074 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s005950070074 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tsuchiya Yasuo Department of Surgery II and aut NATIONALLICENCE 700 1- Suzuki Shohachi Department of Surgery II and aut NATIONALLICENCE 700 1- Sakaguchi Takanori Department of Surgery II and aut NATIONALLICENCE 700 1- Kojima Yoshimitsu Department of Surgery II and aut NATIONALLICENCE 700 1- Okamoto Kazuya Department of Surgery II and aut NATIONALLICENCE 700 1- Kurachi Kiyotaka Department of Surgery II and aut NATIONALLICENCE 700 1- Konno Hiroyuki Department of Surgery II and aut NATIONALLICENCE 700 1- Baba Satoshi Department of Pathology II, Hamamatsu University School of Medicine, 3600 Handa-cho, Hamamatsu 431-3192, Japan, JP aut NATIONALLICENCE 700 1- Nakamura Satoshi Department of Surgery II and aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer