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Open Access Quantitative Analysis of Formaldehyde-induced Fluorescence in Paraffin-embedded Specimens of Malignant Melanomas and Other Melanocytic Lesions

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Inter-observer agreement is problematic in the histopathological diagnosis of melanoma and melanocytic naevi, even among expert pathologists. Formaldehyde-induced fluorescence (FIF) has been used for histochemical demonstration of catecholamines, 5-hydroxytryptamine and their immediate precursors. FIF can detect melanogenic activity and may be useful in differentiating malignant melanoma from other melanocytic lesions. The fluorescence of various types of melanocytic lesions has been previously studied quantitatively in formalin-fixed and paraffin-embedded sections. This study compared 2 sets of excitation and emission bands: 450–490 nm excitation/510–560 nm absorption filters (filter unit A) and 480 nm excitation/<510 nm absorption filters (filter unit B). Higher FIF was observed with filter unit A than with filter unit B. FIF intensity of central regions was found to be higher than that of the peripheral regions. Mean FIF was significantly higher in malignant melanomas than in naevi. Fluorescence imaging with filter unit A gave better diagnostic performance. In conclusion, quantitative measurement of FIF is a useful marker of malignant potential.

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Keywords: DIGITAL FLUORESCENCE MICROSCOPE; FORMALDEHYDE-INDUCED FLUORESCENCE; MELANOCYTIC LESIONS; QUANTITATIVE STUDY

Document Type: Research Article

Publication date: March 1, 2016

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  • Acta Dermato-Venereologica is a bi-monthly international peer-reviewed journal for clinical and experimental research in the field of dermatology and venereology.

    It was founded in 1920 by Johan Almqvist and edited during 1936-1969 by Sven Hellerström. Since 1970, the journal has been published for the Society for the Publication of Acta Dermato-Venereologica on a non-profit basis.

    Acta Dermato-Venereologica publishes high-quality manuscripts in English dealing with new observations on basic dermatological and venereological research, as well as clinical investigations. Each volume also features a number of review articles in special areas, as well as short Letters to the Editor to stimulate debate and to disseminate important clinical observations. Acta Dermato-Venereologica has rapid publication times and is amply illustrated with a large number of colour photographs to enhance understanding.

    Acta Dermato-Venereologica covers inter alia:

    • ~ Atopic dermatitis and contact allergy
    • ~ Facial dermatoses and adnexal disorders
    • ~ New treatments
    • ~ Psoriasis and genodermatoses
    • ~ Psychodermatology
    • ~ Sexually transmitted diseases
    • ~ Skin biology and inflammation
    • ~ Skin cancer and pigmentation
    • ~ Skin immunology and lymphoma
    • ~ Urticaria and itch

    Extensive papers, proceedings from congresses and symposia are printed as supplements to the journal. Announcements concerning pertinent dermatological meetings and books received are also published.
    Readership: Doctors and scientists interested in dermatology, skin biology and venereology.

    Acta Dermato-Venereologica has an impact factor of 3.007.

    Issues between 1998 up to 2005 can be found at http://www.medicaljournals.se/acta/content

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