Abstract Purpose: To conduct a scope review of the experimental model described by Walker and Mason, by identifying and analyzing the details of the method. Methods: The authors searched Pubmed-Medline, Cochrane-Bireme and PEDro databases for articles published between January 2016 and December 2018, using the following search queries: burns, burn injuries, models animal, and animal experimentation. All articles whose authors used Walker and Mason's model - with or without changes to the method in Wistar rats - were included in this study. Results: The search identified 45 mentions of Walker and Mason's model; however, after reading each summary, 20 were excluded (of which 5 due to duplicity). The inconsistencies observed after the scope review were: water temperature, length of time of exposure of the experimental model's skin to water, extent of the burnt area, and the description of the thickness/depth of the injury. Conclusions: Reproducibility of a scientific method is the basis to prove the veracity of the observed results. Thus, it is necessary to have a greater number of publications that adopt a reproducible scientific method, for this review found inconsistencies in the description of Walker and Mason's model.

ABSTRACT Introduction: The incidence of burns involving pregnant women is not well established in the literature, but is estimated to be between 3% and 7%. The management of burns in pregnancy represents a great challenge with significant impact on outcomes and maternal-fetal prognosis. Case Report: In the present study, we report two cases of pregnant burn victims who were treated in the burn unit in the Paulista School of Medicine, Federal University of São Paulo (EPM/UNIFESP). One patient was treated in the first trimester and the other in the third trimester. Conclusion: In both cases, the pregnant women received specialized treatment for burns in conjunction with clinical follow-up by the obstetrics team, with good maternal-fetal outcomes.

RESUMO Introdução: A incidência de queimaduras em gestantes não é bem estabelecida na literatura mundial, mas estima-se que varie entre 3% e 7%. Os cuidados da gestante queimada representam um grande desafio com impacto significante nos resultados e prognóstico materno-fetais. Relato de Caso: No presente estudo relatamos dois casos de gestantes vítimas de queimaduras que foram tratadas na unidade de tratamento de queimaduras na Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM/UNIFESP), uma no primeiro trimestre e a outra no terceiro trimestre. Conclusão: Em ambos os casos, as gestantes receberam tratamento especializado para queimaduras em conjunto com acompanhamento clínico da equipe da obstetrícia, com boa evolução materno-fetal.

ABSTRACT Introduction: The hand represents 3% of total body surface, but its involvement in severe trauma, such as burns, can lead to serious functional sequelae. The present study describes procedures in the care of patients in the acute phase with burns involving the hands. Methods: 122 patients with thermal burns involving one or both hands were included in the study between August 2011 and July 2014. On initial physical examination, the extent and depth of the lesions were determined; deep and circular burns, with signs and symptoms of inadequate perfusion, had escharotomies performed to avoid the loss of extremity. Burns of partial deep thickness or full thickness on the back of the hands received tangential excision within 5 days after the trauma; partial skin grafting was performed on all patients before the 15th day of the trauma. Results: Men represented the majority of cases (58%). In relation to the burn agent, flammable liquids caused 46.7% of admissions. In 50.8% of the cases, the burns were of partial deep thickness or of total thickness and required an operative procedure. No graft loss was identified in the group. Escharotomies were performed in 12.3% of the patients. Conclusion: The burned hand needs proper local attention and care, along with early excision and skin grafting.

RESUMO Introdução: A mão representa 3% da superfície corporal total, porém seu envolvimento em trauma grave, como uma queimadura, pode levar a sequelas funcionais graves. O presente estudo descreve os procedimentos no atendimento de pacientes na fase aguda com queimaduras envolvendo as mãos. Métodos: 122 pacientes com queimaduras térmicas envolvendo uma ou ambas as mãos foram incluídos no estudo, entre agosto de 2011 a julho de 2014. No exame físico inicial, determinou-se a extensão e a profundidade da lesão; as queimaduras profundas e circulares, com sinais e sintomas de perfusão inadequada, tiveram escarotomias realizadas para evitar perda de extremidade. As queimaduras de espessura parcial profunda ou de espessura total no dorso das mãos foram submetidas à excisão tangencial até 5 dias após o trauma; e o enxerto de pele parcial foi realizado em todos os pacientes antes do 15º dia do trauma. Resultados: Os homens representaram a maioria (58% da casuística). Em relação ao agente das queimaduras, os líquidos inflamáveis corresponderam a 46,7% das internações. Em 50,8% dos casos, as queimaduras eram de espessura parcial profunda ou de espessura total e necessitaram de procedimento operatório. Não foi identificada perda de enxerto no grupo. As escarotomias foram realizadas em 12,3% dos pacientes. Conclusão: A mão queimada necessita de atenção e cuidados locais adequados, juntamente com excisão precoce e enxertia de pele.

PURPOSE: To simulate a lymph node metastasis in an animal model using activated carbon, assess their identification in frozen section analysis and compare with histopathological examination in paraffin. METHODS: Thirty two adult female rats were used. They received the carbon injection on its hind legs. Half of the rats was sacrificed on day one, and the other half after 21 days. Thus, 64 lymph nodes were dissected and split longitudinally. One half of the lymph node was sent immediately to frozen section analysis. The other half was fixed in 10% formaldehyde to be cut in paraffin. Slides were divided into quadrants and classified by the presence of carbon in these four quadrants_ They were also classified by the carbon staining intensity. RESULTS: Comparing the slides obtained in the first day and 21 days, there was a tendency of carbon to spread over time, but without statistical significance. The intensity did not alter over time. CONCLUSION: There was no concordance between the two methods of pathological analysis, however the actived carbon was seen in all lymph nodes.

PURPOSE: To propose an experimental burn model in NIH-3T3 cell line.METHODS:Induction of thermal injury in cultures of mouse fibroblast - NIH-3T3- cell line and determination of cell viability by MTT and imunofluorescence.RESULTS:The heating of the Petri dish increased proportionally to the temperature of the base and the time of exposure to microwave. In this in vitro burn model, using the cell line NIH-3T3 was observed drastic cellular injury with significant changes in cell viability and activity. It showed drastically modified cell morphology with altered membrane, cytoskeleton and nucleus, and low cellularity compared to the control group.CONCLUSION:The burn model in vitro using the cell line NIH-3T3 was reproductive and efficient. This burn model was possible to determine significant changes in cell activity and decreased viability, with drastic change in morphology, cell lysis and death.

OBJETIVO: Qualificar os dados espectrais FT-Raman do melanoma cutâneo primário e metastático e assim realizar o diagnóstico diferencial. MÉTODOS: Foram utilizadas amostras de 10 fragmentos de pele sem alterações clínicas ou histopatológicas, 10 de melanomas cutâneos e 9 de metástases linfonodais; 105, 140 and 126 espectros foram obtidos respectivamente. Cada amostra foi dividida em 2 ou 3 frações de 2 mm³ e posicionada no porta amostras do espectrômetro Raman para obtenção dos espectros, por meio da excitação do espalhamento inelástico pelo laser de Nd:YAG em 1064 nm incididos na amostra. RESULTADOS: Para diferenciar os três grupos formados de acordo com as características fornecidas pelos espectros, realizamos a análise discriminante dos dados. As variáveis espectrais Fenilalanina, DNA e Amida-I se destacaram na capacidade de diferenciação dos três grupos histológicos. A porcentagem de classificação correta utilizando estes critérios foi de 93,1%; o que mostra a eficiência da análise realizada. CONCLUSÃO: A espectroscopia FT-Raman é capaz de diferenciar o melanoma de sua metástase, assim como da pele normal.

PURPOSE: To qualify the FT-Raman spectral data of primary and metastatic cutaneous melanoma in order to obtain a differential diagnosis. METHODS: Ten normal human skin samples without any clinical or histopathological alterations, ten cutaneous melanoma fragments, and nine lymph node metastasis samples were used; 105, 140 and 126 spectra were obtained respectively. Each sample was divided into 2 or 3 fragments of approximately 2 mm³ and positioned in the Raman spectrometer sample holder in order to obtain the spectra; a monochrome laser light Nd:YAG at 1064 nm was used to excite the inelastic effect. RESULTS: To differentiate the three histopathological groups according to their characteristics extracted from the spectra, data discriminative analysis was undertaken. Phenylalanine, DNA, and Amide-I spectral variables stood out in the differentiation of the three groups. The percentages of correctly classified groups based on Phenylalanine, DNA, and Amide-I spectral features was 93.1%. CONCLUSION: FT-Raman spectroscopy is capable of differentiating melanoma from its metastasis, as well as from normal skin.

OBJETIVO: Avaliar a casuística do Setor de Tumores Cutâneos da Disciplina de Cirurgia Plástica da Escola Paulista de Medicina/ Universidade Federal de São Paulo em relação à Perfusão Isolada de Membro (PIM) para o tratamento das metástases em trânsito do melanoma cutâneo, bem como os resultados conseqüentes, comparando-os com a literatura internacional. MÉTODO: De maio de 1993 a abril de 2007, 41 pacientes portadores de metástases em trânsito do melanoma cutâneo submeteram-se a 44 PIM. Por meio da observação de seus prontuários, foram avaliados quanto à toxicidade regional e sistêmica, e resposta tumoral após a PIM. Após a coleta dos resultados, procedeu-se a comparação com a literatura internacional e as posteriores conclusões. RESULTADOS: Houve 43,2% de respostas completas, 36,4% de respostas parciais e 20,4% sem resposta ao tratamento proposto. A toxicidade regional aguda descrita foi, de modo geral, restrita a edema e eritema discretos, não havendo nenhum caso de complicação sistêmica grave. CONCLUSÃO: Os dados obtidos nessa casuística corroboram os descritos pela literatura internacional, demonstrando a importância e a possibilidade da PIM para o controle locoregional das metástases em trânsito do melanoma cutâneo também na realidade brasileira.

BACKGROUND: To evaluate our cases at the Skin Tumors Sector of Plastic Surgery Division at Federal University of São Paulo in relation to Isolated Limb Perfusion (ILP) for the treatment of in transit melanoma metastases, as well as the results, comparing them with international literature. METHODS: From May 1993 until April 2007, 41 patients with in transit metastases of skin melanoma were submitted to 44 ILP. Medical registry observations were evaluated in terms of regional and systemic toxicity and tumoral response after ILP. The obtained results were compared with international literature and posterior conclusions were done. RESULTS: We observed 43.2% of complete responses, 36.4% of partial responses and 20.4% of no responses after the procedures. Acute regional toxicity was in general restricted to slight erythema or edema, and there was no single case of serious systemic complication. CONCLUSION: The obtained data are in accordance with international literature demonstrating the importance and the possibility of ILP for locoregional control of in transit metastases of skin melanoma also in Brazilian reality.

OBJETIVO: Avaliar a importância da biópsia do linfonodo sentinela em pacientes com melanoma cutâneo MÉTODOS: Noventa pacientes com estadiamento I e II foram acompanhados prospectivamente no período de seis anos, de forma consecutiva e não randomizada e submetidos a biópsia do linfonodo sentinela. RESULTADOS: Os pacientes foram acompanhados durante tempo médio de 30 meses. A média de idade dos pacientes foi de 53,3 anos, variando de 12 a 83. Quanto ao sexo, foram avaliados 30 pacientes do sexo masculino (37,5%) e 50 do sexo feminino (62,5%).32,5% dos pacientes apresentaram linfonodo sentinela positivo e 67,5% linfonodo sentinela negativos. Comparando-se a espessura tumoral com a positividade do LS, verificou-se que quanto maior a espessura, maior a incidência de positividade do linfonodo sentinela. No grupo de pacientes com LS positivo a recorrência surgiu em 43,5% dos casos, mostrando a relação entre a recorrência e a positividade do LS. Não houve complicações no pós-operatório. CONCLUSÃO: A biópsia do linfonodo sentinela mostrou-se um método seguro para selecionar os pacientes que necessitam de linfadenectomia terapêutica.

PURPOSE: To assess the importance of sentinel lymph node biopsy in patients with cutaneous melanoma. METHODS: Ninety consecutive non-randomized patients with stages I and II melanoma who underwent sentinel lymph node biopsy were followed up prospectively for six years. RESULTS: Patients were followed up for a mean period of 30 months. Their mean age was 53.3 years, ranging from 12 to 83 years. Thirty patients were male (37.5%) and 50, female (62.5%). Sentinel lymph node was positive in 32.5% and negative in 67.5%. It was found that the thicker the tumor, the greater the incidence of positive sentinel lymph nodes. In the group of patients with positive sentinel lymph nodes, recurrence occurred in 43.5%, but in those with negative sentinel lymph nodes, in only 7%, what points out to the association of tumor recurrence and positive sentinel lymph nodes. There were no major postoperative complications. CONCLUSION: Sentinel lymph node biopsy was demonstrated to be a safe method for selecting patients who need therapeutic lymphadenectomy.

OBJETIVO: Estabelecer um modelo experimental de cultura primária de melanoma metastático por punção aspirativa por agulha fina (PAAF). MÉTODOS: Duas culturas primárias de células de melanoma metastático através de PAAF foram desenvolvidas a partir de pacientes submetidos à excisão de lesões metastáticas e identificadas por imunohistoquímica utilizando os marcadores S-100 e MB-45, específicos para melanoma. RESULTADOS: O diagnóstico da cultura foi confirmado através da imunohistoquímica. A técnica oferece vantagens como pequena morbidade e invasibilidade, além do mais, a mesma lesão pode ser puncionada seqüencialmente durante o tratamento do doente. CONCLUSÃO: O estabelecimento de cultura primária de melanoma metastático a partir de punção aspirativa por agulha fina mostrou-se uma técnica viável.

PURPOSE: Establish an experimental model of metastatic melanoma primary culture cells from fine-needle aspiration biopsies (FNAB). METHODS: Two metastatic melanoma primary culture cells from (FNAB) have been developed from patients who had been submitted to excision of metastatic lesions and they were identified by immunohistochemical analyses using S-100 and MB-45 melanoma markers. RESULTS: The culture diagnostic was confirmed by immunohistochemical. The technique of FNAB offers the advantage of providing a sequential analysis of the same tumor nodules throughout treatment, and is a minimally invasive procedure with almost no associated morbidity. CONCLUSION: The establishment of metastatic melanoma primary culture from FNAB samples showed a viable technique.

Spontaneous perforation of the common bile duct is rare. It happens predominantly in children and it is related to obstructive disease of the biliary tract. We present a case of an 18 year-old male patient, with ulcerative rectocolitis associated with malignant tumor of the head of pancreas. The patient developed an acute abdomen syndrome and laparotomy, a spontaneous perforation of common bile duct was evidenced. The authors make a revision of the clinical aspects of that pathology.