Photodynamic therapy and fluorescent diagnostics of breast cancer

Elena G. Vakulovskaya M.D.; Victor P. Letyagin; Loubov V. Umnova; Georgiu N. Vorozhcsov; Victor Philinov

doi:10.1117/12.538107

14 June 2004 Photodynamic therapy and fluorescent diagnostics of breast cancer

Elena G. Vakulovskaya M.D., Victor P. Letyagin, Loubov V. Umnova, Georgiu N. Vorozhcsov, Victor Philinov

Proceedings Volume 5315, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy XIII; (2004) https://doi.org/10.1117/12.538107
Event: Biomedical Optics 2004, 2004, San Jose, CA, United States

Abstract

Photodynamic Therapy (PDT) and fluorescent diagnostics (FD) using Photosense have been provided in 26 patients with breast cancer (BC) and in 108 patients with skin metastases of BC. In 22 patients with T1-T2N0M0 primary tumor PDT was preoperative treatment, with radical mastectomy 7-10 days after PDT. 4 patients had residual tumor after radiotherapy. FD was fulfilled with spectranalyser. We used semiconductive laser for PDT-λ=672+2nm, P=1,5 W, interstitial irradiation 2-24 hours after PS injection in light dose 150-200 J/cm³ in patients with primary tumor and multiple surface irradiations (1-4) with interval 24-48 hours and total light dose 400-600 J/cm² for metastases. Partial regression of tumor with pathomorphosis of 2-4 degree has been found in 23 cases in first group. Treating metastases we had overall response rate of 86,9% with complete response (CR) in 51,5% and partial response in 35,4%. In a year after PDT in 52 patients with CR we had CR in 36,6%, local recurrences in 23,1%, progression (distant [lung or bone] metastasis) in 40,4% of cases. Our experience show pronounced efficacy of FD for detecting tumor borders and PDT for treating BC as preoperative modality and as palliation in cases of recurrencies.

Citation Download Citation

Elena G. Vakulovskaya M.D., Victor P. Letyagin, Loubov V. Umnova, Georgiu N. Vorozhcsov, and Victor Philinov "Photodynamic therapy and fluorescent diagnostics of breast cancer", Proc. SPIE 5315, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy XIII, (14 June 2004); https://doi.org/10.1117/12.538107

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