This article reports a preliminary observation oh the growth of cercarial embryo of S.japonicum in defined medium cultivated one week in vitro. When extract of head-foot tissue of Oncomelania hupensis was added to the medium contained 1/2 RPMI 1640, the length of cercarial embryo increased. While liver extract of the snail was added to the same medium, the growth was inhibited.It seemed that the extract of snail liver tissue might be poisonous to the cercarial embryo.

Objective To summarize the experience in the diagnosis and treatment of intraductal papillary mucinous neoplasms (IPMN) of the pancreas.Methods The clinical data of 16 cases of intraductal papillary mucinous neoplasms of the pancreas in the First Affiliated Hospital of China Medical University from January,2000 to October,2013 was retrospectively analyzed.Results There were 9 males and 7 females,age ranging from 37 to 61 years (average 49 years).The common complaint was epigastric pain.Ultrasonography and CT scan found solid lesions in all cases,main pancreatic duct dilatation was found in 10 cases.All the cases received surgical resection of the tumor.Pathology showed adenomas in 14 cases,borderline tumors in one,and adenocarcinoma in one.14 patients were followed-up ranging from 5 to 48 months,all were alive without recurrence and metastasis.Conclusions IPMT is a special type of pancreatic tumor.Surgical resection is the most effective treatment with excellent prognosis.