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1.
Braz. j. microbiol ; 48(2): 208-210, April.-June 2017. graf
Article in English | LILACS | ID: biblio-839387

ABSTRACT

Abstract This communication reports the second known case of oral phaeohyphomycosis in a patient with squamocellular carcinoma of the lip. The patient, an 82-year-old black woman, a former smoker (for more than 30 years), suffering from an ulcerous vegetative lesion in the middle third of the lower lip for approximately 12 months. The result of the histopathological analysis indicated carcinoma, with well-differentiated keratinized squamous cells and the presence of septate mycelial filaments. In the direct mycological examination, thick and dematiaceous septate mycelial filaments were observed. After the resection surgery, the patient did not need to use an antifungal drug to treat the phaeohyphomycosis, and no follow-up radiotherapy was needed to treat the squamocellular carcinoma. We stress that the presence of the squamocellular lesion of the lip was a possible contributing factor to the infection.


Subject(s)
Humans , Female , Aged, 80 and over , Lip Neoplasms/complications , Carcinoma, Squamous Cell/complications , Phaeohyphomycosis/diagnosis , Phaeohyphomycosis/pathology , Lip/pathology , Brazil , Lip Neoplasms/surgery , Carcinoma, Squamous Cell/surgery , Microbiological Techniques , Treatment Outcome , Phaeohyphomycosis/surgery , Histocytochemistry , Lip/surgery , Microscopy
2.
São Paulo; s.n; 2015. 59 p. ilus, tab. (BR).
Thesis in Portuguese | LILACS, BBO | ID: biblio-868006

ABSTRACT

A intensa exposição ao Sol sujeita o lábio, principalmente o inferior, aos danos provocados pela absorção de radiação ultravioleta (UV). O carcinoma epidermoide é a neoplasia maligna que se desenvolve nos lábios após exposição crônica prolongada aos raios UV e acredita-se que todos os casos sejam precedidos pela desordem potencialmente maligna denominada queilite actínica. Ambas as lesões são causados pelos efeitos nocivos da radiação UV agindo diretamente sobre o DNA, por meio do fenômeno da fotocarcinogênese. Nesse processo, a radiação provoca mutações que são capazes de causar a iniciação, progressão e a promoção de neoplasias. No entanto, é também importante considerar que outros eventos moleculares, além das mutações, estão envolvidos na iniciação e progressão do câncer. Alterações moleculares com ganho ou perda de função de componentes da via de sinalização Notch estão envolvidas em diferentes tipos de cânceres hematológicos e sólidos. Entretanto, a participação da sinalização Notch em câncer de lábio ainda é desconhecida.


Assim, o objetivo desse trabalho foi investigar se a via Notch está relacionada às lesões de queilite actínica e de carcinoma epidermoide de lábio e sua participação na fotocarcinogênese bucal. Para isso, foram utilizados 45 casos de queilite actínica, 15 casos de carcinoma epidermoide de lábio e 05 casos de lábio com aspecto de normalidade, nos quais foi analisada a expressão de Notch1 e Jagged1 por meio da técnica de imuno-histoquímica. Os resultados demonstraram que houve perda da expressão de Notch1 em 40% dos carcinomas epidermoides de lábio, sugerindo que a expressão reduzida de Notch1 pode converter os queratinócitos a um estado ativado e imaturo. Observou-se ainda, diferença nos padrões de marcação de Nocth1 e Jagged1 nas células epiteliais sugerindo que o sinal da via Notch seja transmitido a partir de uma célula apical para uma célula basal devido a localização das células que expressam o receptor e das que expressam o ligante. Concluiu-se, assim, que os resultados imuno-histoquímicos não apontam a uma regulação diferencial da expressão da proteína Notch1 e Jagged1 em lesões UV induzidas.


The intense exposure to the sun subject the lips, particularly the lower, the damage caused by the absorption of ultraviolet (UV) radiation. The squamous cell carcinoma is a malignant tumor that develops on the lips after prolonged chronic exposure to UV rays and it is believed that all cases are preceded by potentially malignant disorder called actinic cheilitis. Both lesions are caused by the harmful effects of UV radiation acting directly on the DNA, through the phenomenon of photocarcinogenesis. In this process, the radiation causes mutations that are capable of causing the initiation, progression and promotion of cancer. However, it is also important to consider that other molecular events, apart from the mutations are involved in the initiation and progression of cancer. Molecular abnormalities with gain or loss of Notch pathway components function are involved in several types of hematological and solid cancer. However,


the participation of Notch signaling in lip cancer is still unknown. The objective of this study was to investigate whether the Notch pathway is related to injuries actinic cheilitis and squamous cell carcinoma of the lip and participation in oral photocarcinogenesis. For this, were used 45 cases of actinic cheilitis, 15 cases of squamous cell carcinoma of the lip and lip 05 cases with normal aspect in which we analyzed the expression of Notch1 and Jagged1 by immunohistochemistry. The results showed loss of Notch1 expression in 40% of squamous cell carcinomas of the lip, suggesting that reduced expression of Notch1 can convert to an activated keratinocytes and immature state. There was also a difference in labeling patterns of Notch 1 and Jagged1 epithelial cells suggesting that the Notch pathway signal is transmitted from an apical cell to a basal cell due to localization of cells expressing the receptor and expressing the ligand. In summary, the immunohistochemical results do not show a differential regulation of Notch 1 and Jagged1 expression in UV induced lesions.


Subject(s)
Humans , Male , Female , Immunohistochemistry/classification , Immunohistochemistry/methods , Lip Neoplasms/complications , Lip Neoplasms/diagnosis , Lip Neoplasms/metabolism , Lip Neoplasms/mortality , Lip Neoplasms/prevention & control , Ultraviolet Rays/classification , Ultraviolet Rays/adverse effects
3.
Rev. bras. otorrinolaringol ; 72(6): 767-771, nov.-dez. 2006. ilus, tab
Article in Portuguese | LILACS | ID: lil-441132

ABSTRACT

Muitos estudos demonstram associação entre queilite actínica e carcinoma espinocelular do lábio. OBJETIVO: Verificar a relação da queilite actínica com o prognóstico dessa neoplasia. MATERIAIS E MÉTODOS: Elaborou-se um estudo de coorte retrospectivo com corte transversal em carcinoma espinocelular do lábio. Cortes histológicos desse tumor, levantados entre 1993-2000, nos arquivos do Departamento de Patologia/Universidade Federal de São Paulo, foram revisados para evidenciar presença ou ausência de queilite actínica no vermelhão adjacente ao tumor. Os prontuários dos pacientes foram revisados à procura de informações sobre exposição solar, metástase e recidiva. A ocorrência ou ausência de recidiva e metástase foi correlacionada com a presença ou ausência de queilite actínica no vermelhão. Os dados obtidos foram analisados pelo teste exato de Fisher. RESULTADOS: Dos 31 pacientes selecionados predominou o sexo masculino, cor da pele branca e localização no lábio inferior. Constatou-se: independência entre a ocorrência de metástase e recidiva com sexo, cor dos pacientes e localizações no lábio superior ou inferior; dependência entre a presença de queilite actínica e elastose solar, dependência entre a ausência de queilite actínica e presença de metástase; independência entre a ausência de queilite actínica e presença de recidiva. CONCLUSÃO: Os tumores originários de queilite actínica têm melhor prognóstico.


Many studies have shown an association between actinic cheilitis and squamous carcinoma of the lips. AIM: The aim of the study was to observe the relation between actinic cheilitis and the prognosis of squamous carcinoma of the lips. MATERIALS AND METHODS This is a retrospective cross-sectional cohort study of squamous carcinoma of the lips. Histological sections of squamous carcinoma tumors done at the the Departament of Pathology of the Sao Paulo Federal University between 1993 and 2000 were reviewed for evidence of actinic cheilitis in the lip vermillion adjacent to the tumor. Patient reports were reviewed to find information about exposure to sun, metastases and relapses. The occurrence or absence of relapses and metastases was correlated with the presence or absence of actinic cheilitis in the lip vermillion. Data was analyzed by FisherÆs Exact test. RESULTS: Of the 31 selected patients, most were caucasian, males and with lower lip involvement. Statistical analysis demonstrated independence between the occurrence of metastases and relapse and gender, skin color and site (lower or upper lips). There was dependence between actinic cheilitis and solar elastosis, and between the absence of actinic cheilitis and the occurrence of metastases. There was no dependence between the absence of actinic cheilitis and the occurrence of relapses. CONCLUSION: It may be concluded that tumors originating from actinic cheilitis have a better prognosis.


Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Carcinoma, Squamous Cell/complications , Cheilitis/complications , Lip Neoplasms/complications , Chronic Disease , Cohort Studies , Cross-Sectional Studies , Carcinoma, Squamous Cell/pathology , Cheilitis/pathology , Lip Neoplasms/pathology , Neoplasm Metastasis , Neoplasm Recurrence, Local , Prognosis , Retrospective Studies
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