Document Detail


A novel approach for treatment of unresectable pancreatic cancer: design of radioactive stents and trial studies on normal pigs.
MedLine Citation:
PMID:  17545539     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: Patients diagnosed with pancreatic cancer typically have a poor prognosis. The aims of these studies were to design radioactive stents and to evaluate the feasibility and safety of the stents in animals. EXPERIMENTAL DESIGN: To combine the effects of stents and brachytherapy, plastic stents with inserted iodine-125 seeds were designed and tested in 18 normal pigs. The pigs were divided into five groups on the basis of radiation dose. The estimated radiation dose at a 5-mm radial distance from the axis of the seeds was 50 Gy in group A, 100 Gy in group B, 150 Gy in group C, and 200 Gy in group D, with four pigs in each group. In the control group (n = 2), the same plastic stents with non-radioactive seeds were implanted in the pancreatic duct. RESULTS: The procedures were successfully done on 14 of 18 (78%) pigs, whereas pancreatic duct perforation occurred in four pigs (22%). The thickened wall of the dilated pancreatic duct was clearly observed in the control group. However, the normal morphologic structure of the pancreatic duct wall disappeared in the experimental groups. Histopathologic examination revealed that the stents were surrounded with necrotic tissues and lateral fibrous tissues. During the follow-up period, the width of outside fibrous tissues gradually increased. CONCLUSIONS: These results indicate that the radioactive stents are safe in all dose groups, and it is feasible to design a special radioactive stent for each patient according to the size, shape, and position of the pancreatic tumor.
Authors:
Yan Liu; Jun-lou Liu; Zhen-zhai Cai; Zheng Lu; Yuan-hang Dong; Zhao-shen Li; Yan-fang Gong; Xiao-hua Man
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical cancer research : an official journal of the American Association for Cancer Research     Volume:  13     ISSN:  1078-0432     ISO Abbreviation:  Clin. Cancer Res.     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-06-04     Completed Date:  2007-08-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9502500     Medline TA:  Clin Cancer Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3326-32     Citation Subset:  IM    
Affiliation:
Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai, China.
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MeSH Terms
Descriptor/Qualifier:
Animals
Brachytherapy / adverse effects,  instrumentation*,  methods
Combined Modality Therapy / methods*
Humans
Iodine Radioisotopes / therapeutic use*
Pancreatic Ducts / surgery*
Pancreatic Neoplasms / therapy*
Plastics
Prognosis
Radiometry
Research Design
Stents* / adverse effects
Swine
Time Factors
Treatment Outcome
Chemical
Reg. No./Substance:
0/Iodine Radioisotopes; 0/Plastics

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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