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ABSTRACT Background Aim Methods Results Conclusion Nevus of Ito and Mongolian spots are distinct clinical presentations of patchy dermal melanocytosis, characterized by similar dermatological manifestations that can pose diagnostic difficulties for clinicians.This review aims to consolidate current understanding and research advancements on these conditions to facilitate clinical diagnosis, differential diagnosis, and management.A comprehensive search of databases including PubMed and Google Scholar was conducted, along with an analysis of pertinent literature retrieved from reference lists spanning nearly four decades.Epidemiological, clinical, and pathological profiles exhibit nuanced differences between the two conditions, with unique expressions under electron microscopy and the regression possibility. It is noteworthy that most Mongolian spots naturally fade with advancing age, in contrast to nevus of Ito, which persist and may potentially evolve into malignant lesions. While picosecond laser treatment has shown greater efficacy than nanosecond lasers, the lower‐energy approach holds particular promise in pediatric cases. The therapeutic landscape for patchy dermal melanocytosis is evolving, shifting from selective photothermal action to photomechanical or subcellular photothermal modalities.This review underscores the importance of meticulous clinical assessment and the potential of innovative therapeutic approaches in managing these conditions. [ABSTRACT FROM AUTHOR]

Background: The microneedle fractional radiofrequency system (MFRS) is able to rejuvenate facial appearance by heating and coagulating certain depth of skin tissue. Objective: To evaluate the safety and efficacy of a novel vacuum‐assisted MFRS for facial contour tightening. Methods: This prospective, randomized, split‐face study included 21 patients who underwent three treatments with a vacuum‐assisted MFRS at 1‐month intervals. Half of the face was treated with the MFRS; the other half was untreated (control). Facial volume changes and wrinkles were objectively measured using a three‐dimensional imaging system and VISIA‐CR. Results: Volume changes of the treated midface were −0.24 ± 0.75, −0.59 ± 0.92, and −0.55 ± 0.65 mL at 1, 3, 6 months follow‐up; however, measurements of the control side were 0.08 ± 0.70, −0.08 ± 0.53, and − 0.10 ± 0.86 mL, indicating significant reductions (p < 0.05). The number of facial wrinkles on the treated side was significantly reduced to 12.44 ± 4.85 at 3 months and sustained at 6 months (11.11 ± 4.100) compared to the control side (14.89 ± 5.26 and 13.22 ± 4.44, respectively; p < 0.05). No long‐term side effects occurred. Conclusion: The vacuum‐assisted MFRS is safe and effective and is recommended for improving facial tightening and reducing wrinkles. This technology is sufficient to ensure the insertion depth, thus helping to improve the treatment accuracy and safety. The MFRS provides sustained effects for at least 6 months. [ABSTRACT FROM AUTHOR]

Aim: This study aimed to evaluate the safety and efficacy of a novel therapeutic strategy, a microneedle fractional radiofrequency system, for hand rejuvenation. Material and Method: Sixteen subjects were enrolled in a self‐controlled evaluator‐blind prospective trial. All subjects received three microneedle fractional radiofrequency treatments at 4 weeks intervals. Hand volume was evaluated through subjective (Hand Volume Rating Scale) and quantitative measurements. Patients were also assessed on the Global Aesthetic Improvement Scale using digital photographs. Patients were followed up at 1, 3, and 6 months after the last radiofrequency treatment. Results: Statistically significant improvements on the Global Aesthetic Improvement Scale and Hand Rating Volume Scale were noted (p < 0.05). Compared with the control side, the treated hand showed a 44% improvement in dorsal skin surface roughness (p < 0.05). Quantitative measurements of hand volume showed a trend toward increased volume for the treated hand, but the difference was not statistically significant. Conclusion: We conclude that microneedle fractional radiofrequency is a safe therapeutic option for hand rejuvenation. [ABSTRACT FROM AUTHOR]