Dermatoscopic Features of Hyperpigmented Dermatoses

In recent years, dermatoscopy has emerged as a valuable adjunctive tool for the diagnosis of various cutaneous disorders. Initially developed for the evaluation of melanocytic lesions, this non-invasive technique has since demonstrated significant utility in the assessment of non-melanocytic hyperpigmented dermatoses. This review provides an up-to-date and practical overview of the dermatoscopic manifestations of common non-melanocytic hyperpigmented conditions, including melasma, nevus of Ota, freckles, lentigines, solar lentigines, seborrheic keratosis, porokeratosis, acquired dermal macular hyperpigmentation, lichen planus-like keratosis, pigmented actinic keratosis, pigmented Bowen's disease, basal cell carcinoma, and acanthosis nigricans. Many of these hyperpigmented disorders exhibit distinct and characteristic dermatoscopic features. Given the clinical diagnostic challenges posed by these conditions and their significant psychological impact on patients, dermatoscopy offers a complementary approach to enhance the accuracy of evaluation and differential diagnosis.