Clinical and Dermoscopic Features of the Scalp in 31 Patients with Dermatomyositis

Julio C. Jasso-Olivares, Antonella Tosti, Mariya Miteva, Judith Domínguez-Cherit, José M. Díaz-González

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Background: Scalp involvement is not directly evaluated in patients with dermatomyositis (DM). Therefore, the exact frequency of scalp dermatomyositis (SDM) and its clinical and trichoscopic characteristics have been poorly described. Objective: The aim of this study was to determine the frequency and clinical and dermoscopic features of SDM in patients diagnosed with DM. Methods: We performed a descriptive prospective, cross-sectional observational study that included all patients diagnosed with DM at a Mexican academic institute over the course of a year. Results: Twenty-four out of 31 patients with DM had scalp involvement at clinical examination, with a prevalence of 77.4%. SDM was clinically characterized by erythema in all cases, scales in 20 (83.3%) patients, nonscarring alopecia in 21 (87.5%) patients, pruritus in 17 (70.8%) patients, and poikiloderma of the scalp in 16 (51.6%) patients. Twenty-eight patients were evaluated by trichoscopy. The most consistent finding was the presence of enlarged capillaries, found in 20 (71.4%) cases, followed by peripilar casts (57.1%) and tufting and interfollicular scales in 14 (50%) cases. Twenty-two patients also had positive nail fold capillaroscopic features similar to those observed by trichoscopy. Limitations: The simple size was limited. Conclusions: Scalp involvement and alopecia are common in patients with DM, and trichoscopy shows features similar to those found at capillaroscopy. Trichoscopy is a very important tool for diagnosis of scalp involvement in patients with DM.

Original languageEnglish (US)
Pages (from-to)119-124
Number of pages6
JournalSkin Appendage Disorders
Issue number3
StatePublished - Aug 1 2017


  • Alopecia
  • Capillaroscopy
  • Dermatomyositis
  • Itchy erythemato-squamous plaques
  • Scalp dermatomyositis
  • Trichoscopy

ASJC Scopus subject areas

  • Dermatology


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