Dermatitis facial por Malassezia pachydermatis / Facial dermatitis caused by Malassezia pachydermatis

Se presenta un caso de dermatitis facial por Malassezia pachydermatis en un paciente de 34 años de edad, diagnosticado mediante clínica y estudio micológico. M. pachydermatis es una levadura que forma parte de la microbiota de mamíferos domésticos y animales salvajes, donde frecuentemente puede provocar dermatitis y otitis externa. En humanos, son escasas las infecciones por este agente, describiéndose desde infecciones superficiales hasta fungemias. En Chile se la ha encontrado como agente causal de pitiriasis versicolor y dermatitis seborreica principalmente en pacientes inmunocomprometidos.

We present a clinical case of facial dermatitis due to Malassezia pachydermatis in a patient of 34 years old, diagnosed by clinical and micology study. M. pachydermatis is a zoofilic yeast that is part of the microbiota of domestic mammals and wild animals, frequently causing dermatitis and external otitis. In humans, infections by this agent are very scarce, describing from superficial infections to fungemias. In Chile it has been found as causal agent of pitiriasis versicolor and seborrheic dermatitis mainly in inmunocompromised patients.

Contact Allergic Dermatitis to Cosmetics and Topical Anti-ageing Products

The main objective of this review article is to provide an update of the literature concerning delayedtypereactions or contact allergic dermatitis caused by cosmetic and anti-ageing ingredients. We scanfor tips on how to recognize these reactions from the history and clinical signs. The common allergensreported include fragrances and preservatives. Be aware of the new allergens. There is a need to patchtest with some of the heavy metals because of their presence in cosmetics but besides nickel, cobaltand occasional mercury, heavy metals do not frequently cause allergic contact dermatitis. They aredangerous because of their systemic toxicity on other internal organs. It is important to recognizethe source of the contact allergens that have been documented in various continents. Reports fromAsian countries (India, China, Korea, Singapore, Malaysia and Japan) have been included to increasethe awareness of cosmetic induced contact allergic dermatitis in this region. This knowledge uponreflections may assist us in our own daily practice.

A Study of Patch Test Results in Patients with Facial Dermatitis / 대한피부과학회지

BACKGROUND: Patch test is usually performed in order to differentiate allergic contact dermatitis from other facial skin diseases; however, there are only infrequent comparative studies regarding the positive allergens patch tested between allergic contact dermatitis and other facial skin diseases. OBJECTIVE: The purpose of this study was to investigate the positivity of patch test in patients with facial dermatitis and to analyze the valid positive allergen patch tested in allergic contact dermatitis compared to other facial skin diseases. In addition, we evaluated the difference of positive allergen according to clinical features, such as age, sex, site of the lesion and duration of disease, in patients with allergic contact dermatitis. METHODS: A total of 409 patients tested with facial dermatitis patch were retrospectively reviewed for medical recordings, including clinical features, occupational history, clinical photos and the results of a Korean standard series of patch tests. RESULTS: Compared with other facial skin disease, patients diagnosed with allergic contact dermatitis showed higher rate in the patch test, responding to 2 or more allergens. They also had more statistically valid positive allergens, such as phenylendiamine base, cobalt, colophony, thimerosal and isothizolinone. In addition, there were a few allergens which revealed significant differences in the positivity of the patch test according to the clinical features in patients diagnosed with allergic contact dermatitis. CONCLUSION: Based on these results, we could receive help in order to classify the positive allergens as relevant allergens in the patch test for the differentiation of allergic contact dermatitis from other facial skin disease.

Patch testing for selection of cosmetic allergens in female facial dermatitis by European standard of cosmetic allergens / 中华医学美学美容杂志

Objective To identify the common allergens of the female patients with facial dermatitis with European standard of cosmetic allergens.Methods Female patients with facial dermatitis were tested with European standard of cosmetic allergens.The reactions to allergens were documented by following the International Contact Dermatitis Research Group recommendations.Results Total 41female patients with facial dermatitis were tested with European standard of cosmetic allergens,themain cosmetic allergens were hexamine(12.20),thimerosal(9.76%),diazolidinyl urea(7.32%)and DMDM hydantoin(7.32%);the main European standard allergens were nickel sulfate(22.20%),formaldehyde(14.63%),4-phenylencdiamine base(9.76%)and fragrance mix (9.76%).Conclusions NickeJ sulfate,formaldehyde,hexamine,thimerosal,4-phenylenediamine base,fragrance mix,diazolidinyl urea and DMDM hydantoin are the main allergens of female patients with facial dermatitis.