- Psoriasis, dermoscopy shows a classic psoriasis vessel pattern:
- Non-polarized light, regularly tightly, uniformly arranged, dotted vessels can be seen.
- Polarized light highlights white scaling throughout, which favors psoriasis over eczema / dermatitis or psoriasis.
- Non-polarized light shows vessels appearing clustered red dots, but these are not regularly uniformly arranged. These are irregularly arranged and some of them are sparse.
- Polarized-light: does not have highlight white scale as in psoriasis but rather this looks almost yellowish to yellow-orange-like scales and scale crust
- Lichen planus: white lines in the epidermis can be seen corresponding to Wickham’s striae.
- Lichen Nitidus: multiple small white circles which represent subepidermal infiltrate of lymphocytes, histiocytes, and multinucleated giant cells in the dermal papillae.
No images due copyright issues
Reference: Trilokraj Tevasvi, MD. Making online decisions inflammatory dermatoses. 8th World Congress of Teledermatology, Skin Imaging and AI in Skin diseases – November 2020