Kwon Soon-hyo

Melasma is a commonly acquired hypermelanosis that affects sun-exposed areas of the skin, with frequent facial involvement. Its histologic manifestations are evident in the epidermis, extracellular matrix, and dermis. In addition to epidermal pigmentation, pathologic findings of melasma include extracellular matrix abnormality, especially solar elastosis. The disrupted basement membrane has been described in melasma with variable incidences. In the dermis, an increase in vascularity and an incre

Management of melasma is highly challenging due to inconsistent treatment results and frequent relapses. However, recent studies revealed that melasma may not only be a disease of melanocytes, but also a photoaging skin disorder. Herein, we attempt to validate that melasma is indeed a photoaging disorder by presenting the histopathologic findings of melasma: solar elastosis, altered basement membrane, increased vascularization and increased mast cell count. We also provide some therapeutic impli

A pulsed erbium:YAG laser is an effective and safe treatment modality for scar revision.

BACKGROUND: Indole-3-acetic acid (IAA) is a newly introduced photosensitizer of photodynamic therapy (PDT) for acne, presenting sebum-reducing, anti-inflammatory and antimicrobial activity. OBJECTIVE: This study was designed to evaluate the efficacy and safety of IAA-PDT in the treatment of facial seborrhoeic dermatitis. METHOD: In this prospective, single-blinded, 6-week trial, 23 patients with facial seborrhoeic dermatitis were treated with IAA-PDT with green light (520 nm) three times with 1-

BACKGROUND: Despite several recent reports on the efficacy of long-pulse pulsed dye laser (LP-PDL) in treating infantile hemangiomas, controversy remains. OBJECTIVES: To determine the beneficial effects of early therapeutic intervention with LP-PDL in superficial and mixed hemangiomas. METHODS AND MATERIALS: Clinical data from 40 children with 47 hemangiomas in preproliferative or proliferative phase treated with LP-PDL in a Korean tertiary hospital over 5 years were analyzed retrospectively. Tr

BACKGROUNDS: We previously reported the efficacy of 0.1% 4-n-butylresorcinol (4nBR) cream in the treatment melasma and synergistic effect of 4nBR and resveratrol (RSV) to inhibit melanogenesis in vitro. AIMS: To evaluate efficacy and safety of a cream which contains liposome-encapsulated 4nBR and RSV in the treatment of melasma. PATIENTS/METHODS: A total of 21 female patients with melasma were treated with the cream for 4 weeks. At baseline, week 2, and week 4, melanin index (MI) of the lesional

We demonstrated the efficacy and safety of the microneedle monopolar RF device in treating periorbital wrinkles. The LMN was superior to the SMN in reducing VISIA wrinkle score.

<b>Background:</b> Pentasodium tetracarboxymethyl palmitoyl dipeptide-12 (PTPD-12), a newly-synthesized peptide, enhances the autophagy activity, ultimately managing inflammation. <b>Objective:</b> To determine the effect of a new moisturizer containing PTPD-12 as the treatment of mild-to-moderate atopic dermatitis (AD). <b>Methods:</b> In this double-blind, randomized, placebo-controlled trial, 43 patients with mild-to-moderate AD were randomly assigned to either the PTPD-12 or control groups.

Resveratrol exhibits not only anti-melanogenic property by inhibiting microphthalmia-associated transcription factor (MITF), but also anti-aging property by activating sirtuin-1 (SIRT1). In this study, the relationship between depigmenting effect of resveratrol and SIRT1/forkhead box O (FOXO) 3a activation and was investigated. Resveratrol suppressed melanogenesis by the downregulation of MITF and tyrosinase via ERK pathway. Results showed that the expression of both SIRT1 and FOXO3a were increa

Thermal skin stimulation by the temperature-controlled continuous RF device improved melasma through dermal rejuvenation.

Our results provide clues of aging-related facial morphological characteristics in Korean female population.

Antioxidants may modulate the microenvironment of epidermal stem cells by reducing the production of reactive oxygen species or by regulating the expression of extracellular matrix protein. The extracellular membrane is an important component of the stem cell niche, and microRNAs regulate extracellular membrane-mediated basal keratinocyte proliferation. In this narrative review, we will discuss several antioxidants such as ascorbic acid, plant extracts, peptides and hyaluronic acid, and their ef

BACKGROUND: Poly-L-lactic acid (PLLA) filler is known to have continuous volume effect. OBJECTIVE: The objective of this study is to analyze objective volume effect of PLLA in different settings of injection schedule on the cheek. METHODS: A split-face, evaluator-blind randomized study in 24 volunteers was conducted. One side was injected 3 times with 4 cc dose and the other side was injected 2 times with 6 cc dose per visit. Facial volume loss scale (FVLS) and Vectra were evaluated. RESULTS: Me

This case highlights the therapeutic challenges of using PRP to promote tissue repair in intractable gefitinib-induced paronychia and merits further investigation.