Level 1: Nevi

From dermoscopedia

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Description In this chapter we describe the 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 seen in benignis any condition that is harmless in the long run neviThis 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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Level 1: The most common patternsThis glossary term has not yet been described. found in nevi (excluding IDNThis glossary term has not yet been described.).

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NetworkThis glossary term has not yet been described. or reticular patternA lesion with a reticular pattern has typical pigment network throughout the entire lesion.:

consists of an organized networkThis glossary term has not yet been described. with minimal variation in its thickness and 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. (i.e., regular/typical networkNetwork with minimal variability in the color thickness and spacing of the lines; symmetrically distributed). The holes of the network are relatively uniform in their appearance.

Patchy network/reticular pattern:

patches of typical network distributed in an organized manner. The network patches all have the same type of network with minimal variability in the thickness and color of the linesstreaksThis glossary term has not yet been described.. It is important to remember that melanomaThis glossary term has not yet been described. on sun damaged skinThis glossary term has not yet been described. can sometimes appear as an isolated large lentiginous lesion with a patchy network. The cluesEvidence, in an investigation to the 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 include the ageprocess of becoming older of the patient since these melanomas occur in the elderly, the network is usually not distributed in an organized fashion, and there is usually focal granularityThis glossary term has not yet been described. present.

Peripheral network with central hypopigmentation:

The peripheral network is typical/regular and the central hypopigmented area is lighter in color compared to the network but darker than the surrounding skinThis glossary term has not yet been described..

Peripheral network with central hyperpigmentation.

The peripheral network is typical/regular and the central hyperpigmented area consists of a blotchDark structureless areas. This blotch often due to the accumulation of melanin laden corneocytes in the straum corneum (i.e., lamella). This lamella can usually be tape stripped off revealing an underlying typical network.

Peripheral network with central brown globulesThis glossary term has not yet been described.:

The peripheral network is typical/regular and the central brown globules are also regular displaying minimal variation in their size and color.

Globular patternThis glossary term has not yet been described.:

This pattern consists only of globules that display minimal variability in their sizes and colorsThis glossary term has not yet been described. (i.e., regular/typical) and are distributed in an organized manner within the lesion. The globules can have different shades of brown. On rare occasion the globules can be white as seen on balloon cell nevi. While black and blue globulesclods blue small can on occasion be seen in congenital neviis a type of melanocytic nevus (or mole) found in infants at birth. This type of birthmark occurs in an estimated 1% of infants worldwide; it is located in the area of the head and neck 15% of the time., their presence should raise suspicion for melanoma.

Cobblestone globular patternThis glossary term has not yet been described.:

This is a specific type of globular pattern that consists of large brown angulated globules that create a pattern reminiscent of cobblestones. This is a pattern associated with congenital nevi.

Reticular pattern with peripheral globulesThis glossary term has not yet been described.:

This pattern consists of a typical network nevus that has a peripheral rim of regular brown globules. This pattern is associated with the radial growth phase of Clark’s/dysplastic neviThis glossary term has not yet been described. and is commonly encountered in younger patients with the atypical mole syndrome.

Homogeneous blue:

A homogeneous blue color with a whitish veil that encompasses the entire lesion’s surface is the hallmark of a blue nevusis a type of melanocytic nevus that clinically and dermoscopically will appear blue. The blue color and white veil in blue nevi will have minimal variation in hues. If there are multiple hues (i.e, heterogeneous blue color or non-homogeneous veil) then one should consider the diagnosis of melanoma. In addition, the differential for blue nevi should include epidemiologic metastasis and if nodular then one needs to consider the diagnosis of nodular melanomaThis glossary term has not yet been described..

Homogeneous brown:

This pattern consists of a nevus with homogeneous brown color with minimal to no variation in its hues. While it is usually devoid of any other structuresThis glossary term has not yet been described., on rare occasions one can see a few regular dotsDots clustered at the center of the lesion, or located on the network lines (also called target network)/globules and fragments of network. This pattern is seen in congenital nevi.