Abstract
In the First Edition of the World Health Organization (WHO) Histological Typing of Skin Tumours (1974), malignant melanoma was classified into four categories:
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1.
Malignant melanoma
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2.
Malignant melanoma arising in precancerous melanosis, including Hutchinson’s melanotic freckle
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3.
Malignant melanoma arising in a blue naevus
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4.
Malignant melanoma arising in giant pigmented naevus
Most melanomas, according to this classification, would belong to categories 1 and 2, the essential histological difference between the two types being the presence of “precancerous melanosis including Hutchinson’s melanotic freckle” in the epidermis adjacent to the invasive neoplasm in category 2, whereas in category 1 there was no such adjacent component.
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References
Clement C, Cochran A, Elder DE et al (1991) Histopathologic diagnosis of dysplastic nevi. Concordance among pathologists convened by the WHO melanoma programme. Hum Pathol 22: 313–319.
Defined as in Weiss SW (1994) Histological typing of soft tissue tumours, WHO International Histological Classification of Tumours. Springer-Verlag, Berlin Heidelberg New York.
Hermanek P, Sobin LH (eds)1992 TNM Classification of Malignant Tumours, 4th edn (2nd revision). Springer-Verlag Heidelberg New York.
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© 1996 Springer-Verlag Berlin Heidelberg
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Heenan, P.J., Elder, D.E., Sobin, L.H. (1996). Melanocytic Tumours. In: Histological Typing of Skin Tumours. World Health Organization International Histological Classification of Tumours. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-80126-6_3
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DOI: https://doi.org/10.1007/978-3-642-80126-6_3
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-60850-9
Online ISBN: 978-3-642-80126-6
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