Dermoscopic findings in psoriasis and seborrheic dermatitis on the scalp and correlation with disease severity

Dermoscopy has frequently been used for hair and scalp disorders. Dermoscopic examinations of psoriasis and seborrheic dermatitis lesions yielded different morphologies. This study aimed to investigate the usefulness of dermoscopy in the clinical differentiation of psoriasis and seborrheic dermatitis on the scalp and additionally to evaluate its capacity in determining disease severity. The study included 46 psoriasis and 50 seborrheic dermatitis patients who were clinically diagnosed and had scalp lesions. Dermoscopic images taken from lesional scalp were then reviewed for microvascular patterns. In addition, we assessed the severity of scalp disease and looked for a correlation with these patterns. The frequency of twisted loops, glomerular vessels, red dots/globules, and polymorphous beaded lines/circles were statistically higher in the psoriasis group, whereas the frequencies of simple loops and arborizing vessels were statistically higher in the seborrheic dermatitis group (p

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Errichetti E, Stinco G. Dermoscopy in general dermatology: A Practical Overview. Dermatol Ther (Heidelb). 2016;6(4):471-507.

Lacarrubba F, Verzì AE, Dinotta F, Scavo S, Micali G. Dermatoscopy in inflammatory and infectious skin disorders. G Ital Dermatol Venereol. 2015;150(5):521-31.

3-Zalaudek I, Argenziano G, Di Stefani A, Ferrara G, Marghoob AA, Hofmann-Wellenhof R, Soyer HP, Braun R, Kerl H. Dermoscopy in general dermatology. Dermatology. 2006;212(1):7-18.

Miteva M, Tosti A. Hair and scalp dermatoscopy. J Am Acad Dermatol. 2012;67(5):1040-8.

Alkurt Kayıkçı M, Arıcan Ö. Dermoscopic findings of patients with alopecia areata. Turkiye Klinikleri J Med Sci. 2012;32(4):1064-71.

Rudnicka L, Olszewska M, Rakowska A, Slowinska M. Trichoscopy update 2011. J Dermatol Case Rep. 2011;5(4):82-8.

Rudnicka L, Rakowska A, Olszewska M. Trichoscopy: how it may help the clinician. Dermatol Clin. 2013;31(1):29-41.

Olszewska M, Rudnicka L, Rakowska A, Kowalska-Oledzka E, Slowinska M. Trichoscopy. Arch Dermatol. 2008;144(8):1007.

Zalaudek I, Lallas A, Moscarella E, Longo C, Soyer HP, Argenziano G. The dermatologist’s stethoscope-traditional and new applications of dermoscopy. Dermatol Pract Concept. 2013;3(2):67-71.

Lallas A, Kyrgidis A, Tzellos TG, Apalla Z, Karakyriou E, Karatolias A, Lefaki I, Sotiriou E, Ioannides D, Argenziano G, Zalaudek I. Accuracy of dermoscopic criteria for the diagnosis of psoriasis, dermatitis, lichen planus and pityriasis rosea. Br J Dermatol. 2012;166(6):1198-205.

Pan Y, Chamberlain AJ, Bailey M, Chong AH, Haskett M, Kelly JW. Dermatoscopy aids in the diagnosis of the solitary red scaly patch or plaquefeatures distinguishing superficial basal cell carcinoma, intraepidermal carcinoma, and psoriasis. J Am Acad Dermatol. 2008;59(2):268-74.

Zalaudek I, Argenziano G. Dermoscopy subpatterns of inflammatory skin disorders. Arch Dermatol. 2006;142(6):808.

Vázquez-López F, Manjón-Haces JA, Maldonado-Seral C, Raya-Aquado C, Perez-Oliva N, Marghoob AA. Dermoscopic features of plaque psoriasis and lichen planus: new observations. Dermatology. 2003;207(2):151-6.

De Angelis R, Bugatti L, Del Medico P, Nicolini M, Filosa G. Videocapillaroscopic findings in the microcirculation of the psoriatic plaque. Dermatology. 2002;204(3):236-9.

Ross EK, Vincenzi C, Tosti A. Videodermoscopy in the evaluation of hair and scalp disorders. J Am Acad Dermatol. 2006;55(5):799-806.

Rosina P, Zamperetti MR, Giovannini A, Girolomoni G. Videocapillaroscopy in the differential diagnosis between psoriasis and seborrheic dermatitis of the scalp. Dermatology. 2007;214(1):21-4.

Tosti A, Torres F. Dermoscopy in the diagnosis of hair and scalp disorders. Actas Dermosifiliogr. 2009;100:114-9.

Kim GW, Jung HJ, Ko HC, Kim MB, Lee SJ, Kim DW, Kim BS. Dermoscopy can be useful in differentiating scalp psoriasis from seborrhoeic dermatitis. Br J Dermatol. 2011;164(3):652-6.

Kibar M, Aktan Ş, Bilgin M. Dermoscopic findings in scalp psoriasis and seborrheic dermatitis; two new signs; signet ring vessel and hidden hair. Indian J Dermatol. 2015;60(1):41-5.