Development and evaluation of a new photodynamic treatment technique for the laser therapy of liver malignancies The combination with new catheter systems enables the use of the photodynamic therapy (PDT) to treat also tumors in parenchymal organs. So far it is mainly used to treat superficial or endoluminal tumors. The presented study is part of a multicenter phase I-study. We treated 5 patients with colorectal liver metastases with the new photosensitizer SQN 400 and following interstitial photodynamic laser treatment. Evaluation of tumors were performed by contrast-enhanced CT scans. In the contrast enhanced CT scans the development of a complete necrosis within a radius of 1 cm around every single fibre could be shown. Additional the ablation of tumors with the combined use of several fibres is possible. Severe complications or toxicities were not observed. The photodynamic laser therapy of liver malignancies is a minimal invasive procedure with little side effects which produces sharply defined yet small volumes of necrosis.

RöFo : Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebende Verfahren

Liver - pathology; Porphyrins - therapeutic use; Injections, Intralesional - instrumentation; Image Enhancement; Humans; Middle Aged; Liver Neoplasms - drug therapy; Male; Tomography, X-Ray Computed; Hematoporphyrin Photoradiation - instrumentation; Colorectal Neoplasms - diagnosis; Necrosis; Liver Neoplasms - diagnosis; Liver - drug effects; Colorectal Neoplasms - drug therapy; Female; Liver Neoplasms - pathology; Aged; Colorectal Neoplasms - pathology; Liver Neoplasms - secondary; Index Medicus

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