2 research outputs found
Bartonella Clarridgeiae Bacteremia Detected In An Asymptomatic Blood Donor
Human exposure to Bartonella clarridgeiae has been reported only on the basis of antibody detection. 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Histologic evaluation of the reduction of cutaneous melanin content after microneedling on the chest
A região anterior do tórax constitui área fotoexposta que apresenta efeitos do fotodano. O microagulhamento é opção segura para rejuvenescimento dessa área, promovendo também a melhora de discromias. Avaliar a resposta histológica cutânea após três sessões mensais de microagulhamento para tratamento de discromias da região anterior do tórax. Foram realizadas, três sessões mensais de microagulhamento com agulhas de 1,5mm de comprimento, e também biópsias cutâneas antes e 90 dias após o início do estudo. As amostras histológicas foram avaliadas com as colorações de HE e Fontana-Masson. O conteúdo de melanina foi mensurado com base em clusters dérmicos. Seis pacientes com idades entre 38 e 67 anos, fototipos II-III, escala Glogau II-IV foram incluídos. Uma correlação positiva foi observada entre o tempo e o conteúdo dérmico de melanina (p= 0,029): três sessões de microagulhamento reduziram esse conteúdo no D90 em comparação com o tempo inicial (6.4 ± 1.7 MC em D0 versus 3.1 ± 0.4 em D90, p = 0.05). Três pacientes relataram melhora global da pele no D90. O mecanismo proposto do microagulhamento para promover clareamento inclui proliferação de fibroblastos e neocolagênese na derme superior. Esse é o primeiro estudo a avaliar histologicamente os achados associados ao clareamento da região do tórax decorrente do microagulhamento1114954The chest is a photoexposed area that shows effects of photodamage. Microneedling is a safe option for the rejuvenation of this area, also leading to improvement in dyschromias. To evaluate histologic cutaneous response after three monthly sessions of microneedling for the treatment of dyschromias on the chest. Three monthly sessions of microneedling, with 1.5mm length needles were performed, as well as skin biopsies before and 90 days after commencement of the study. Histologic samples were evaluated with H&E and Fontana-Masson stains. Melanin content was measured based on dermal clusters. Results: Six patients between 38 and 67 years of age, phototypes II-III, Glogau scale II-IV were included. A positive correlation was observed between the time and dermal content of melanin (p= 0.029): three sessions of microneedling reduced this content on D90 compared to the beginning (6.4 ± 1.7 MC on D0 versus 3.1 ± 0.4 on D90, p = 0.05). Three patients reported global skin improvement on D90. The proposed mechanism of microneedling to promote lightening includes fibroblast proliferation and neocollagenesis in the upper dermis. This is the first study to evaluate the histology of the findings associated to lightening of the chest due to microneedling. © 2019 Sociedade Brasileira de Dermatologia - Todos os direitos reservados