Prudhomme M, Rouy S, Tang J, Landgrebe J, Delacrétaz G, Godlewski G. Biliary structures lead to tumour recurrences after laser-induced interstitial thermotherapy.
Lasers Surg Med 2000;
24:269-75. [PMID:
10327045 DOI:
10.1002/(sici)1096-9101(1999)24:4<269::aid-lsm4>3.0.co;2-i]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND OBJECTIVE
Thermal diffusion during laser-induced interstitial thermotherapy (LITT) has not yet been fully investigated in heterogeneous tissue architecture such as liver. LITT was performed on rabbit liver tumours to analyse the role of biliary structures in thermal diffusion.
STUDY DESIGN/MATERIALS AND METHODS
Twenty-four VX2 tumours were grafted onto 12 rabbit livers. The animals were randomly separated into two groups when tumour size reached 8 mm. Thermotherapy was performed by delivering the 830-nm output of a diode laser to the centre of the tumour with a 300-,microm fibre. Irradiation conditions were 1.5 W over 900 sec. On day 7 or 14, the tumours were removed and stained with haematoxylin-eosin and picrosirius red F3BA (PR). Thermal damage was evaluated by PR and electron microscopic examinations.
RESULTS
Among the treated tumours, recurrences were found both at the periphery (one on day 7, seven on day 14) and within the treated area (two on day 7, two on day 14). All recurrences were located in the vicinity of the biliary structures, which are frequently spared from thermal injury.
CONCLUSION
Biliary ducts lead to a heat sink, thereby facilitating tumour recurrences.
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