Focal laser interstitial thermotherapy (LITT) at 980 nm for prostate cancer: treatment feasibility in Dunning R3327-AT2 rat prostate tumour.

Abstract:

OBJECTIVE:To examine the feasibility and reproducibility of laser interstitial thermotherapy (LITT) as a minimally invasive method for the treatment of prostate cancer. MATERIALS AND METHODS:Heterotopic tumours of prostatic adenocarcinoma (Dunning R3327-AT2) were induced in 10 male Copenhagen rats. After preoperative magnetic resonance imaging (MRI), a 10-mm cylindrical diffusing fibre developed by our research department was inserted under ultrasonographic guidance into the tumour. LITT was performed with a 980-nm diode laser (power 5 W) for 75 s (fluence rate of 1145 J/cm(2)). Non-enhanced T2-weighted and dynamic gadolinium-enhanced T1-weighted MRI examinations were performed at baseline, 1 and 48 h after the procedure and correlated with histological findings. RESULTS:The necrosis lesions induced by LITT were visible on MRI. The mean (SD) ellipsoid necrosis volumes were 0.748 (0.075) mL at 1 h and 0.982 (0.052) mL at 48 h after the LITT procedure, and significantly different (P < 0.001). Histological analysis showed a strong correlation (r = 0.87) with the mean necrosis volume obtained by MRI at 48 h after LITT. CONCLUSIONS:In a prostatic adenocarcinoma model, 980-nm LITT induces reproducible necrosis volumes. Further characterization of the response to LITT in an animal model and in human tissues will be important in establishing the efficacy of the procedure for prostate cancer focal therapy.

journal_name

BJU Int

journal_title

BJU international

authors

Colin P,Nevoux P,Marqa M,Auger F,Leroy X,Villers A,Puech P,Mordon S,Betrouni N

doi

10.1111/j.1464-410X.2011.10406.x

subject

Has Abstract

pub_date

2012-02-01 00:00:00

pages

452-8

issue

3

eissn

1464-4096

issn

1464-410X

journal_volume

109

pub_type

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