Irregular Streaks

From dermoscopedia

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 Authored by: Ralph P. Braun

 Keywords:   streaks · irregular streaks
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Description This chapter describes the histopathological correlation of 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. term irregular streaksThis glossary term has not yet been described.
Author(s) Ralph P. Braun
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Status released
Status update July 2, 2018
Status by Ralph P. Braun


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Streakslines radial (always at periphery) streaks Reed nevus melanoma recurrent nevus are linear pigmented projections seen at the periphery of lesions.
Streaks schematic 25.jpg
Both pseudopods (streakslines radial (always at periphery) streaks Reed nevus melanoma recurrent nevus with bulbous projections at their tips) and radial streamingRadial linear extensions at the lesion edge (streaks without bulbous projections at their tips) are considered to be streaks. Streaks in melanomaThis glossary term has not yet been described. are usually observed only focally and asymmetrically at the lesion’s periphery and reflect the radial growth phase of the tumor. On the other hand, streaks that are distributed symmetrically around the entire perimeter of the lesion are seen mostly in pigmented spindle cell neviThis glossary term has not yet been described. (Spitz or Reed). Histologically, streaks represent confluent junctional nests of melanocytes.