الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Psoriasis is a prevalent skin ailment that impacts over 125 million individuals globally.(264) Scalp psoriasis may occur either alone or in conjunction with other types of psoriasis.(202) The first location of psoriasis is frequently the scalp, where it eventually develops in approximately 80% of patients. In addition to being a physical burden, scalp psoriasis causes great psychological distress.(265)
Thick scales covering distinct red, thickened skin are the hallmarks of scalp psoriasis. Often, the scales are silvery white. There is a chance that psoriasis will extend beyond the hairline. Psoriasis often affects the back of the head, although it can also affect separate spots on the scalp or the entire scalp. Both severe itching and even no symptoms are possible with scalp psoriasis. It often lasts for many years and is a chronic issue, albeit its severity and extent frequently change.(202)
While scalp psoriasis is usually easy to diagnose clinically, the diagnosis can be challenging especially in cases with exclusive scalp localization, minimal lesions, or atypical presentation. Trichoscopy has recently emerged as an important tool in the clinical diagnosis of scalp psoriasis, reducing the necessity for scalp biopsies.(266)
The aim of this study is to determine the clinical, trichoscopic, and histopathologic hair changes in patients with scalp psoriasis.
This study was carried out on thirty psoriatic patients with scalp involvement who were recruited from the Dermatology outpatient clinic of the Department of Dermatology, Venereology and Andrology, Faculty of Medicine, Alexandria University.
In the current work, males represent the majority of our population (22 patients; 73.3%), which is consistent with Narcisi et al.(267) who assessed the role biologic drugs for scalp psoriasis and reported most scalp psoriasis patients in their work to be males (65.35%). Also, a study that examined the microbiota of 39 patients with psoriasis scalp lesions conducted by Choi et al.(268) mentioned that males with scalp psoriasis were more predominant than females irrespective of the severity of the disease. Contrary to our findings, Bruni et al.(266) who studied the clinical and trichoscopic fin