Colored dots on trichoscopy—beware of artifacts

Author index

“…2019;80:e129-30 (Notes & comments) Thyssen JP (see 80:251-65 (Review) Thyssen JP (see Yew et al). 2019;80:390-401 (From the Dermatology Foundation) Tiwary P (see Sonthalia and Tiwary). 2019;80:e143-4…”

Pseudotrichoscopic findings from colour product use: a retrospective analysis and a test to reproduce findings

“…2 These products are mainly used to colour or volumize the hair, or to make thinning hair look thicker. 3 Although a few reports have previously described this issue, 2,4 no studies have systematically assessed the artificial trichoscopic findings produced by these products.…”

“…Histopathological examination of PN lesions shows a dermal infiltrate of inflammatory cells, such as macrophages, mast cells, T lymphocytes and eosinophils. 4 Interleukin (IL)-31 is a pruritogenic cytokine released by many of these cells and it is upregulated in the skin of patients with PN. 4 Alitretinoin downregulates the activity of these inflammatory cells.…”

“…4 Interleukin (IL)-31 is a pruritogenic cytokine released by many of these cells and it is upregulated in the skin of patients with PN. 4 Alitretinoin downregulates the activity of these inflammatory cells. 2 In particular, mast cell downregulation is important, as it mediates pruritus through the release of histamine, tryptase, prostaglandins, leucotrienes, IL-2, IL-4, IL-6, IL-31 and nerve growth factor (NGF).…”