Melanoma pattern requiring context

From dermoscopedia

Main PageTwo-step algorithmMelanoma pattern requiring context
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 Authored by: Ralph P. Braun     ·  Aimilios Lallas     ·  Ashfaq A. Marghoob

 Keywords:   melanoma · two-step algorithm
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Description This chapter describes 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. pattern of melanomaThis glossary term has not yet been described. that require contextThis glossary term has not yet been described.
Author(s) Ralph P. Braun · Aimilios Lallas · Ashfaq A. Marghoob
Owner Ash Marghoob→ send e-mail
Status released
Status update July 2, 2018
Status by Ralph P. Braun


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Melanomas will usually manifest a disorganized distribution of structuresThis glossary term has not yet been described. and colorsThis glossary term has not yet been described. making their identification quite easy. These lesions will reveal at least one, but usually more than one, of the melanoma specific structures listed below. On rare occasions melanomas will present with a symmetric and organized pattern but these tumors will almost always reveal one of the following features: starburst patternThis pattern consists of peripheral globules, pseudopods or streaks (or a combination of them), located around the entire perimeter of the lesion, negative networkSerpiginous interconnecting broadened hypopigmented lines that surround elongated and curvilinear globules., blue-black or gray 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., shiny white structuresThis glossary term has not yet been described., vesselsThis glossary term has not yet been described. or ulceration.

A few melanoma patternsThis glossary term has not yet been described. deserve special mention.
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  • Featureless or structureless (non-specific or feature poor) lesions are lesions that have no dermoscopic structuresThis glossary term has not yet been described. or do have dermoscopic structures but the structures present cannot be used to differentiate benignis any condition that is harmless in the long run from malignantThis glossary term has not yet been described.. If such lesions are non-palpable then they can be digitally monitored or can be biopsied. If such a lesion is palpable then digital monitoring is contraindicated and the lesion should be biopsied.
  • MelanomaThis glossary term has not yet been described. should be in the differential diagnosisis the identification of the nature and cause of a certain phenomenon. Diagnosis is used in many different disciplines with variations in the use of logic, analytics, and experience to determine "cause and effect". In systems engineering and computer science, it is typically used to determine the causes of symptoms, mitigations, and solutions for any blue-black nodule.
  • Melanoma in situThis glossary term has not yet been described. can manifest a pattern comprised of small foci of hyperpigmentation. The hyperpigmented areas differ from blotches in that they are small (cover <10% surface area), multiple and do not obscure the ability to see underlying structures. These melanomas will also often reveal prominent skin markings.
  • Melanoma on sun damaged non-facial skinThis glossary term has not yet been described. (lentigo malignaThis glossary term has not yet been described.) is associated with the following patterns: patches of peripheral networkThis glossary term has not yet been described. islands, tan structureless areas with granularityThis glossary term has not yet been described., and a lesion with angulated linesSyn: polygons, zig-zag pattern Gray-brown lines that are connected at an angle or coalescing to form polygons.