ضایعات پیگمانته ی سر و گردن در بیماران زیر ۱۸ سال مطالعه ای گذشته نگر در یک جمعیت ایرانی.

Background and Aim: Pigmented lesions appear with different manifestations in focal, multifocal and diffuse forms and can also be a symptom of a systemic disease. These lesions have a significant prevalence in the head and neck area. The aim of this study was to determine the prevalence of pigmented lesions in the head and neck region in patients referred to Razi Hospital in Tehran. Material and Methods: A cross-sectional descriptive study was conducted on 3000 archived files in Razi Hospital in Tehran in 2018 and 2019. All pigmented lesions in patients under 18 years of age were isolated and analyzed in terms of age, gender, location and histopathological diagnosis. Data were analyzed using SPSS version 26 and Chi-square and T-test statistical tests. The significance level of statistical tests was considered less than 0.05. Result: A total of 138 patients under 18 years of age were found with pigmented lesions 56 patients were male (40.6%) and 82 patients were female (59.4%). The average age of the patients was reported to be 11.1 ± 4.6 years. Meanwhile, compound nevus and intradermal nevus lesions were the most prevalent. The most involved sites were cheek (29.7%), nose (16.7%) and head (15.9%). A total of 6 cases of malignant pigmented lesions were found (4.3%). Conclusion: Nevi types are the most common pigmented lesions in this age group and more frequent in check area. [ABSTRACT FROM AUTHOR]