Laser-induced thermotherapy: intra- and extralesionary recurrence after incomplete destruction of experimental liver metastasis View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2001-11

AUTHORS

C. Isbert, A. Roggan, J.-P. Ritz, G. Muller, H.J. Buhr, K.-S. Lehmann, C.-T. Germer

ABSTRACT

PURPOSE: The aim of this study was to determine the energy (J/mm3 tumor volume) and temperature required for a complete laser-induced thermotherapy (LITT) of experimental liver tumors, and to find out causes and areas of local recurrence followed by incomplete treatment. METHODS: In VX-2 tumor-bearing rabbits LITT was performed using neodymium:yttrium-aluminum-garnet (Nd:YAG) laser (1064 nm) with a diffuser-tip applicator and a temperature feedback system. The animals were randomized into four groups (n = 20) that differed in the target temperature at the tumor border as follows: 45 degrees C, 50 degrees C, 55 degrees C and 60 degrees C. The target temperature was held for 10 min constant. Histologic examination (hematoxylin and eosin [H and E], nicotinamide adenine dinucleotide phosphate [NADPH]-dehydrogenase) was performed at 0 h, 24 h, 96 h, and 14 days after LITT. RESULTS: The pretreatment tumor volume of 2191 +/- 61 mm3 was the same for all groups (p > 0.05). Energy up to target temperature and total energy required, lesion size, and the rate of incomplete tumor ablation (recurrences) are listed below (ap < 0.05, Kruskal-Wallis test). Histologically, two forms of local recurrences could be differentiated intralesionary and extralesionary. CONCLUSIONS: To achieve complete in situ ablation under the given conditions, it is necessary to apply laser energy of 3 J/mm3 tumor volume. A minimum temperature of 60 degrees C on the tumor border presumed an application of 10 min. Recurrence was found outside the coagulation zone (extralesionary) and in high vascularized areas within the coagulation zone (intralesionary). More... »

PAGES

1320-1326

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00464-001-0006-6

DOI

http://dx.doi.org/10.1007/s00464-001-0006-6

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1024526153

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/11727143


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147 Institute for Medical, Technical, Physics and Lasermedicine, University Medical Center Benjamin Franklin Freie Universitat, Berlin, Germany, DE
148 rdf:type schema:Organization
 




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