Blue whitish veil
|Description||In this chapter we describe blue white structuresterm used for flat areas with white (scarlike) and blue color. This has to be distinguisehd from blue white veil. networkThis glossary term has not yet been described. and its histopathological correlation|
|Author(s)||Ralph P. Braun · Katrin Kerl · Oriol Yélamos|
|Responsible author||Ralph Braun → send e-mail|
|Status update||May 21, 2019|
|Status by||Ralph P. Braun|
Blue-white veil is confluent blue pigmentation with an overlying white “ground-glass” haze. In melanomaThis glossary term has not yet been described., the bluewhite veil does not occupy the entire surface area of the lesion, but rather is present as a focal, ill-defined area. Histopathologically, this dermoscopic structure corresponds to an aggregation of heavily pigmented cells (melanocytes and/or melanophages) or melanin in the dermis (blue colorColor (American English) or colour (Commonwealth English) is the characteristic of human visual perception described through color categories, with names such as red, yellow, purple, or blue.) in combinationThis glossary term has not yet been described. with compact orthokeratosis . At times, it is difficultneeding much effort or skill to accomplish to distinguish between regression structuresThis glossary term has not yet been described. (namely melanosis) and blue-white veil by dermoscopyThe examination of [skin lesions] with a 'dermatoscope'. This traditionally consists of a magnifier (typically x10), a non-polarised light source, a transparent plate and a liquid medium between the instrument and the skin, and allows inspection of skin lesions unobstructed by skin surface reflections. Modern dermatoscopes dispense with the use of liquid medium and instead use polarised light to cancel out skin surface reflections. because both structuresThis glossary term has not yet been described. display blue-white color. However, examining the lesion without dermoscopy can helpRefers to giving assistance or support to others for mutual benefit differentiate between blue-white color due to regression versus due to deep melanocytes. In regression the surface contour will be flat (macular) and in blue-white veil the surface will be raised and palpable. In melanoma the blue-white veil is nonuniform in color and is present focally within the lesion. In contrast, the blue-white veil has a uniform steel-blue color in blue neviThis glossary term has not yet been described. and it occupies the entire surface area of the lesion.