Pancreatic lymphoepithelial cyst with an intracystic papillary projection. Report of a case.
BACKGROUND
Lymphoepithelial cysts of the pancreas show various presentations on imaging studies often making a differential diagnosis difficult.


METHODS
A 58-year-old man was admitted to our hospital with epigastric discomfort and abdominal bloating. Abdominal US was carried out and demonstrated a cystic lesion 5 cm in diameter which included an intracystic projection into the pancreatic body. This intracystic projection was also seen on CT and MR images. On FDG-PET images, the projection was positively visualized. Since we could not exclude a pancreatic cystic neoplasm, a distal pancreatectomy was performed. Postoperative pathological examination demonstrated that the lesion was a lymphoepithelial cyst of the pancreas. There were no atypical cells in the intracystic projection.


CONCLUSIONS
Resection is inevitable when a true pancreatic neoplasm cannot be excluded.
Maekawa
Hiroshi
H
Department of Surgery, Shizuoka Hospital, Juntendo University School of Medicine, Izu-no-kuni, Shizuoka 410-2295, Japan. hmaekawa0201@gmail.com
Yoneyama
Hisashi
H
Komatsu
Yoshihiro
Y
Orita
Hajime
H
Sakurada
Mutsumi
M
Sato
Koichi
K
Yamano
Miki
M
D002291:Carcinoma, Papillary / Q000473:pathology / Q000601:surgery; D002465:Cell Movement; D004847:Epithelial Cells / Q000473:pathology*; D006801:Humans; D008214:Lymphocytes / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D010180:Pancreatectomy; D010181:Pancreatic Cyst / Q000175:diagnosis* / Q000473:pathology* / Q000601:surgery; D010190:Pancreatic Neoplasms / Q000473:pathology / Q000601:surgery