Authored by: Aimilios Lallas
User=scabiesThis glossary term has not yet been described. consists of small dark brown triangular structures located at the end of whitish structureless lines (curved or wavy), giving an appearance reminiscent of a delta-wing jet with contrail (Fig 9a). Microscopically, the brown triangle corresponds to the pigmented anterior part of the mite, while the burrow of the mite correlates dermoscopically to the contrail feature. Since then, the value of dermoscopyDermoscopy is a non invasive diagnostic method. in diagnosisThis glossary term has not yet been described. of scabies has been extensively investigated in several studies. The diagnostic accuracy of the technique was reported to be at least equal to traditional ex-vivo microscopic examination (i.e. skin scraping), while additional comparative advantages of dermoscopy include its non-invasiveness and lower requirements in terms of time, costs and experience. Nowadays, dermoscopy has replaced ex-vivo microscopy as the routine method for diagnosis of scabies in several dermatology centers. Additional to its value for diagnosis, dermoscopy may also be useful in treatment monitoring, heralding treatment success when dermoscopic ‘jet with contrail’ features can no longer been detected.larva migransThis glossary term has not yet been described. (creeping eruption), by revealing translucent brownish structureless areas in a segmental arrangementThis glossary term has not yet been described., corresponding to the body of the larva.pediculosisThis glossary term has not yet been described. by revealing the lice itself or the nits fixed to the hair shaft (Fig 9b).Nits containing vital nymphs dermoscopically display ovoid brown structures, while the empty nits are translucent and typically show a plane and fissured free ending. This information is particularly useful for treatment monitoring, since dermoscopic detection of vital nits should lead to a continuation or modification of therapy. Additionally, dermoscopy has been recently shown to enable the discrimination between nits and the so-called pseudo-nits, such as hair casts, debris of hair spray or gel. The latter are not firmly attached to the hair shaft and appear dermoscopically as amorphous, whitish structures.skinThis glossary term has not yet been described., while a brown to grey translucent ‘shield’ with pigmented streakslines, radial (always at periphery) Reed nevus, melanoma, recurrent nevus corresponds to the tick’s body (Fig 9d). Following the removal of the tick, detection of brown to black to grey areas of pigmentation by dermoscopy indicates incomplete removal.
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