Pigmented contact dermatitis and hair dyes: A retrospective case-control multicentre study in Korea.

Background: Pigmented contact dermatitis (PCD), a rare variant of non-eczematous contact dermatitis, is clinically characterized by sudden-onset brown or grey pigmentation on the face and neck. It is hypothesized to be caused by repeated contact with low levels of allergens.

Objectives: This study evaluated the risk of using hair dyes in patients with PCD in Korea.

Dermoscopic findings and histopathological correlation in large cell acanthoma.

Since large cell acanthoma (LCA) has many overlapping clinical and histopathological features with other epidermal pigmented tumours, an additional method to differentiate it would be of great clinical significance. A retrospective study was performed on 33 lesions (26 patients) to identify distinct dermoscopic findings of LCA and to describe dermoscopic-histopathological correlations. The results revealed that dermoscopy significantly aids in the distinction of LCA from other epidermal tumours included in the differential diagnosis.

Clinical characteristics and long-term outcome of 223 patients with mycosis fungoides at a single tertiary center in Korea: A 29-year review.

Background: Data regarding Asian patients with mycosis fungoides (MF) are limited.

Objective: We aimed to investigate the clinical profile and long-term outcomes of patients with MF in Korea.

Methods: A retrospective review of 223 patients with MF who were followed up for more than 6 months or died of MF within 6 months of diagnosis was performed.

A Case Report on the Dermoscopic Features of Spark's Nevus.

Spark's nevus is a compound word composed of Spitz nevus and Clark's nevus. It is one of the combined melanocytic nevi which is more common in female and usually presents as a sharp circumscribed hyperpigmented macule on the lower extremities. On histopathologic findings, both cytologic features of Spitz nevus characterized as large spindle or epithelioid melanocytes containing large nuclei with abundant cytoplasm, and architecture of Clark's nevus characterized as elongation of rete ridges, bridging of the nests, concentric and lamellar fibrosis can be seen.

The effectiveness of high-dose ultraviolet A-1 phototherapy for acute exacerbation of atopic dermatitis in Asians.

Background/purpose: Atopic dermatitis (AD) is an inflammatory skin disease characterized by a chronic course of exacerbations and remissions. High-dose ultraviolet A-1 (UVA-1) phototherapy has been effective in the treatment of acute exacerbations of AD. However, there have been no case studies in Asian patients to date.

Erratum: Folliculotropic Mycosis Fungoides in 20 Korean Cases: Clinical and Histopathologic Features and Response to Ultraviolet A-1 and/or Photodynamic Therapy.

[This corrects the article on p. 192 in vol. 30, PMID: 29606817.

Folliculotropic Mycosis Fungoides in 20 Korean Cases: Clinical and Histopathologic Features and Response to Ultraviolet A-1 and/or Photodynamic Therapy.

Background: Folliculotropic mycosis fungoides (FMF) is a variant of mycosis fungoides (MF) that is characterized clinically by variable types of skin eruptions, including plaques, acneiform lesions, and alopecic patches. Histopathologically, FMF is characterized by folliculotropic infiltrates.

Objective: This study was conducted to scrutinize the clinical and histopathologic features of FMF in Koreans and the responses to phototherapy.

Histopathologic Finding of Perieschar Lesions in Tsutsugamushi Disease Shows Lymphocytic Vasculitis Mimicking Angiocentric Lymphoma.

Background: Tsutsugamushi disease is an acute, febrile, infectious disease caused by . Several studies investigating the histopathologic findings of eschars in tsutsugamushi disease reported leukocytoclastic vasculitis and neutrophil infiltration as the major findings. However, these findings may result from secondary changes following tissue necrosis.

Degos-Like Lesions Associated with Systemic Lupus Erythematosus.

Degos disease, also referred to as malignant atrophic papulosis, was first described in 1941 by Köhlmeier and was independently described by Degos in 1942. Degos disease is characterized by diffuse, papular skin eruptions with porcelain-white centers and slightly raised erythematous telangiectatic rims associated with bowel infarction. Although the etiology of Degos disease is unknown, autoimmune diseases, coagulation disorders, and vasculitis have all been considered as underlying pathogenic mechanisms.

Usefulness of Dermoscopy in the Differential Diagnosis of Ruptured and Unruptured Epidermal Cysts.

Background: An epidermal cyst is a common keratin-filled epithelial-lined cyst. The treatment of choice for epidermal cysts is surgical excision. If the cyst becomes ruptured, incision and drainage with oral antibiotic therapy or intralesional steroid injection are required.