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Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on mdpi.com as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
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5-Aminolevulinic acid-based fluorescence diagnostics of cervical preinvasive changes

Institute of Oncology of Vilnius University, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
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Medicina 2014, 50(3), 137-143; https://doi.org/10.1016/j.medici.2014.08.004
Received: 26 November 2012 / Accepted: 3 June 2014 / Published: 12 August 2014
The purpose of this article is to review the diagnostic possibilities of 5-aminolevulinic acid (5-ALA)-based fluorescence diagnosis of preinvasive cervical changes.
Reviewed papers were selected from the PubMed database with keywords combining the terms individual cervical neoplasia and fluorescence diagnostics. The regular colposcopy procedure lacks specificity; therefore, new methods are continually sought for superior diagnosis of cervical pathology. 5-ALA-based fluorescence diagnostics is under investigation as an up-to-date diagnostic technique for cervical intraepithelial neoplasia (CIN). This method is grounded on the topical or systemic application of 5-ALA, which induces excess production of the endogenous photosensitizer protoporphyrin IX (PpIX) in tissues where carcinogenesis has begun. The conversion of PpIX to the heme is less efficient in tumors; therefore, higher amounts of PpIX tend to accumulate in premalignant and malignant tissues. Illumination with light of the appropriate wavelength initiates excitation of PpIX fluorescence, which in turn helps to localize PpIX-rich areas and identify potentially malignant tissues. A number of investigations suggest that because of its high selectivity for tumors and low toxicity to healthy tissues, 5-ALA-based diagnosis seems a promising tool for the noninvasive identification of cervical intraepithelial neoplasia.
Keywords: Cervical intraepithelial neoplasia; 5-Aminolevulinic acid; Fluorescence diagnostics; Photodynamic diagnostics; Photosensitizing agent Cervical intraepithelial neoplasia; 5-Aminolevulinic acid; Fluorescence diagnostics; Photodynamic diagnostics; Photosensitizing agent
MDPI and ACS Style

Vansevičiūtė, R.; Venius, J.; Letautienė, S. 5-Aminolevulinic acid-based fluorescence diagnostics of cervical preinvasive changes. Medicina 2014, 50, 137-143.

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