Share Email Print
cover

Proceedings Paper

Hydrokolloid occlusive dressings for photodynamic therapy (PDT) of cutaneous lesions with endogenous porphyrins induced by 5-aminolevulinic acid
Author(s): Johannes Gahlen; Josef Stern; Christian Herfarth
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Protoporphyrin (Pp IX) is the final intermediate product before haem and can be stimulated to a phototoxic reaction with light. The presence of 5-aminolevulinic acid can increase the intracellular biosynthesis of Pp IX in certain types of tumor cells. The photosensitizing concentrations of Pp IX make laser light induced fluorescence diagnostics (LIFD) and photodynamic therapy possible. A topical application of a 5-aminolevulinic acid solution requires a waterproof occlusive dressing for several hours. We developed a simple technique for a practical preparation for PDT using a hydrocolloid dressing. The normal surrounding skin can be spared. We present our first therapeutic experience with a case of cutaneous breast cancer in a 65-year-old female patient. Six hours after topical application of 10% isotonic 5- aminolevulinic acid under the hydrocolloid dressing PDT was performed (Ar-Dye Laser, 630 nm wavelength). Twenty four hours after PDT a superficial tumor necrosis could be observed with a maximum depth of tumor necrosis of 2 - 3 mm. The surrounding normal skin was without any inflammation.

Paper Details

Date Published: 1 March 1995
PDF: 2 pages
Proc. SPIE 2371, 5th International Photodynamic Association Biennial Meeting, (1 March 1995); doi: 10.1117/12.203407
Show Author Affiliations
Johannes Gahlen, Cirurgische Universitaetsklinik Heidelberg (Germany)
Josef Stern, Cirurgische Universitaetsklinik Heidelberg (Germany)
Christian Herfarth, Cirurgische Universitaetsklinik Heidelberg (Germany)


Published in SPIE Proceedings Vol. 2371:
5th International Photodynamic Association Biennial Meeting
Denis A. Cortese, Editor(s)

© SPIE. Terms of Use
Back to Top