Objective: Post-inflammatory hyperpigmentation (PIH) is a reactive hypermelanosis of various skin types, which occurs as a sequela of cutaneous inflammation or injury. Despite generally a self-limited and temporary condition, PIH is still a frustrating problem that can have significant psychosocial effects on patients, especially those with darker skin types. Laser therapy is one of the effective treatments for PIH, and various wavelength lasers and light devices have been utilized in PIH therapy. Nonetheless, data on the long-term efficacy of the 755-nm alexandrite picosecond laser are limited. Methods: This study analyzed two cases of PIH treated with a combination of a 755-nm alexandrite picosecond laser and a diffractive lens array or zoom handpiece. Efficacy of the treatment was determined by the images of skin lesions under a fixed light source before and after each treatment, which were independently reviewed by two plastic-surgery specialists blinded to the clinical data. Improvement was classified as complete (>75%), significant (50-75%), mild (25-50%), and inefficient (<25% or no obvious change). Skin imaging analysis was carried out using the VISIA system (Canfield, USA), and dermoscopy was performed at the same time. Results: After two to three courses of treatment, all cases showed significant or complete improvement, and no recurrence was observed during the three years of follow-up. Conclusion: A 755-nm alexandrite picosecond laser in combination with a diffractive lens array or zoom handpiece had significant and long-term efficacy for the treatment of PIH caused by trauma. However, attention should be paid to the problem of transient deepening of pigmentation during treatment.

Post‐inflammatory hyperpigmentation (PIH), a common sequela of acute or chronic cutaneous inflammation, is an acquired pigmentary disorder. The main treatments for PIH, such as topical agents, photoprotection, and chemical peeling, demonstrated different efficacies with inconsistent outcomes. Here, we reported a case of nasal PIH treated using a 755‐nm alexandrite picosecond laser. The patient (female, aged 36 years) presented with a brown macula on the left side of the nasal dorsum 2 years ago, received treatment, and was followed up in the Plastic Surgery Department of Beijing hospital.

Objective The present study aims to explore the effect of acne debridement + meticulous nursing on 5-aminolevulinic acid photodynamic therapy (ALA-PDT) in adolescent patients with moderate–severe acne. Methods A total of 60 adolescent patients with moderate–severe acne who were admitted to our plastic surgery outpatient clinic between January 2018 and January 2020 were selected as the subjects of the present retrospective study. The patients were divided into two groups: the observation group and the control group (n = 30, each). Patients in the control group were treated with standardized ALA-PDT and conventional nursing, while patients in the observation group were treated with ALA-PDT and acne debridement + meticulous nursing intervention. The treatment’s therapeutic effect, adverse reaction incidence, and patient satisfaction 6 months after treatment were compared between the two groups. Results The acne debridement + meticulous nursing effectiveness was 86.7% in the observation group and 60% in the control group, and the adverse reaction incidence was 20% in the observation group and 46.7% in the control group. There existed statistically significant differences in the above-stated indicators between the two groups (p < 0.05). The difference in the visual analogue scores (VASs) for pain, which were measured immediately after the operations, between the two groups was not statistically significant (p > 0.05); however, the respective VAS differences between the two groups at 30 min and 60 min after the operation were statistically significant (p < 0.05). There was a statistically significant difference in patient satisfaction between the two groups (p < 0.05). Conclusion In adolescent patients with ALA-PDT-treated moderate–severe acne, the application of acne debridement + meticulous nursing could improve the clinical treatment efficacy and patient comfort as well as reduce the adverse reaction incidence. For these reasons, the treatment method could be worth promoting in clinical practice.

Nasolabial folds (NLFs) are the most pronounced sign of facial aging. This study (ClinicalTrials.gov NCT04609891) explored the efficacy and safety of polycaprolactone gel in treating Chinese patients with moderate to severe NLFs. Patients with moderate to severe NLF who wished to be treated by dermal fillings were recruited from three centers between July 2017 and September 2019. Randomizing ratio was 1:1 in polycaprolactone group (polycaprolactone injection) or control group (sodium hyaluronate gel injection). The primary endpoint was the effectiveness rate of Wrinkle Severity Rating Score (WSRS) scores at 12 months after injection. The full-analysis set (FAS) and safety sets had 80 patients in the polycaprolactone group and control group, respectively. In the FAS, the effectiveness rate at 12 months in the polycaprolactone group was 88.8% compared with 23.8% in controls (P<0.001). The improvement in WSRS sustained during 12 months in the polycaprolactone group, while gradually vanished in the control group since 3 months after surgery. The global aesthetic improvement scale by investigator assessments were improved, much improved, or very much improved in all patients during follow-up, while the proportion of patients with a “no change” assessment gradually increased during follow-up after 6 months in control group. The rates of injection-related adverse event (AE) and serve injection-related AE were 8.8% vs. 11.3% and 0 vs. 1.3% in the polycaprolactone group and control groups, respectively. Polycaprolactone gel injection is effective and safe to treat moderate to severe NLFs in Chinese patients.

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