RESUMEN
BACKGROUND: A number of non-coding circular RNAs (circRNAs) have recently been implicated in the modulation of gene expression in cancer models. We therefore sought to explore if circZNF236 has a role in oral squamous cell carcinoma (OSCC). METHODS: We first examined circZNF236 expression in 32 pairs of OSCC and noncancerous tissues. We then investigated a functional role for circZNF236 using knockdown and overexpression approaches in OSCC cancer cell lines. Cell counting kit-8, wound healing, Transwell, and flow cytometry were employed to assess circZNF236 function in vitro. The association between circZNF236 and miR-145-5p, or that between miR-145-5p and malignant brain tumor domain containing 1 (MBTD1) was predicted by bioinformatics and demonstrated by dual-luciferase reporter assays, RNA pull-down assays as well as RNA immunoprecipitation (RIP) assays. A mouse OSCC xenograft model was employed to demonstrate the impacts of circZNF236 inhibition on tumor development in vivo. RESULTS: OSCC tissues and cells had higher levels of circZNF236 expression compared with normal controls. Furthermore, high circZNF236 levels in patients with OSCC correlated with a poor prognosis. CircZNF236 silencing decreased the malignant properties of OSCC cells and suppressed OSCC tumor formation in the mouse model. We then noticed that miR-145-5p can be regulated by circZNF236, and that circZNF2361 promoted OSCC development by absorbing miR-145-5p and consequently upregulating MBTD1 expression. CONCLUSION: CircZNF236 modulates OSCC via the miR-145-5p/MBTD1 axis. These results support the potential of circZNF236 as a treatment target for OSCC.
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Carcinoma de Células Escamosas , Neoplasias de Cabeza y Cuello , MicroARNs , Neoplasias de la Boca , Humanos , Animales , Ratones , MicroARNs/genética , MicroARNs/metabolismo , Carcinoma de Células Escamosas/patología , Carcinoma de Células Escamosas de Cabeza y Cuello/genética , Línea Celular Tumoral , Neoplasias de la Boca/patología , Modelos Animales de Enfermedad , Neoplasias de Cabeza y Cuello/genética , Proliferación Celular/genética , Regulación Neoplásica de la Expresión Génica , Proteínas Cromosómicas no HistonaRESUMEN
ABSTRACT BACKGROUND: Endoscopic submucosal dissection (ESD) of esophageal superficial neoplasm is associated with a high en bloc R0 resection rate and low recurrence. OBJECTIVE: We aim to compare the performance and clinical outcomes of ESD via ESD after circumferential incision (ESD-C) versus submucosal tunneling (ESD-T). METHODS: Single-center retrospective analysis of all consecutive patients who underwent ESD for superficial esophageal cancer, between 2009 and 2018. ESD-T was defined as the technique of making the mucosal incisions followed by submucosal tunneling in the oral to anal direction. ESD-C consisted of completing a circumferential incision followed by ESD. Main study outcomes included en bloc and R0 resection rates. Secondary outcomes included procedural characteristics, curative resection rate, local recurrence and adverse events. RESULTS: A total of 65 procedures (23 ESD-T and 42 ESD-C) were performed for ESCC (40; 61.5%) and BE-neoplasia (25; 38.5%). There were no statistically significant differences between patients who underwent ESD-T versus ESD-C in en bloc (91.3% vs 100%, P=0.12), R0 (65.2% vs 78.6%, P=0.24), curative resection rates (65.2% vs 73.8%, P=0.47) and mean procedure time (118.7 min with vs 102.4 min, P=0.35). Adverse events for ESD-T and ESD-C were as follows: bleeding (0 versus 2.4%; P=0.53), perforation (4.3% vs 0; P=0.61), esophageal stricture (8.7% versus 9.5%; P=0.31). Local recurrence was encountered in 8.7% after ESD-T and 2.4% after ESD-C (P=0.28) at a mean follow-up of 8 and 2.75 years, respectively (P=0.001). CONCLUSION: ESD-T and ESD-C appear to be equally effective with similar safety profiles for the management of superficial esophageal neoplasms.
RESUMO CONTEXTO: A dissecção endoscópica submucosa (DES) no tratamento da neoplasia superficial do esôfago está associada a uma alta taxa de ressecção R0 em bloco e baixa taxa de recorrência. OBJETIVO: O objetivo deste estudo é comparar o desempenho e os resultados clínicos da DES com incisão circunferencial (DES-C) versus com DES com túnel submucoso (DES-TS). MÉTODOS: Estudo retrospectivo de banco de dados coletados prospectivamente de um centro especializado em DES, investigando pacientes consecutivos submetidos à DES por câncer de esôfago superficial, entre 2009 e 2018. DES-TS foi definida como a técnica de realizar primeiro incisões na mucosa seguida de tunelamento submucoso no sentido oral para anal. DES-C consistiu em completar uma incisão circunferencial seguida da dissecção submucosa. As principais variáveis do estudo incluíram taxas de ressecção em bloco e R0. Os resultados secundários incluíram características do procedimento, taxa de ressecção curativa, recorrência local e eventos adversos. RESULTADOS: Um total de 65 procedimentos (23 DES-TS e 42 DES-C) foram realizados para CCE de esôfago (40; 61,5%) e neoplasia associada ao EB (25; 38,5%). Não houve diferenças estatisticamente significativas entre os pacientes submetidos a DES-TS versus DES-C nas taxas de ressecção em bloco (91,3% vs 100%, P=0,12), R0 (65,2% vs 78,6%, P=0,24), taxas de ressecção curativa (65,2% vs 73,8%, P=0,47) e tempo médio do procedimento (118,7 min com vs 102,4 min, P=0,35). Os eventos adversos para DES-TS e DES-C foram os seguintes: sangramento (0 vs 2,4%; P=0,53), perfuração (4,3% vs 0; P=0,61), estenose esofágica (8,7% vs 9,5%; P=0,31). A recorrência local foi encontrada em 8,7% após DES-TS e 2,4% após DES-C (P=0,28) em um seguimento médio de 8 e 2,75 anos, respectivamente (P=0,001). CONCLUSÃO: DES-TS e DES-C demostram ser igualmente eficazes com perfil de segurança semelhante para o tratamento das neoplasias superficiais do esôfago.
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Humanos , Neoplasias Esofágicas/cirugía , Estenosis Esofágica , Resección Endoscópica de la Mucosa/efectos adversos , Estudios Retrospectivos , Resultado del Tratamiento , Recurrencia Local de NeoplasiaRESUMEN
OBJECTIVES: The diagnostic performance of cytology in esophageal squamous cell carcinoma (ESCC) is meticulously described. METHODS: Cytological and biopsy specimens were prospectively taken during esophagogastroduodenoscopy of 123 individuals in 2013 and 2014. Cytology samples were maintained in preservative fluid until processing and biopsies were formalin-fixed and paraffin-embedded. RESULTS: Based on endoscopic biopsy results, 70 cases were positive for ESCC whilst 53 were negative for cancer. In addition, brush cytology showed high sensitivity and specificity (98.57 and 96.23%, respectively) in detecting the disease, and high accuracy (97.5%) comparable to that provided by histopathology which is the accepted gold standard. CONCLUSION: Brush cytology specimens preserved in liquid medium may be a good alternative for ESCC diagnosis.
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Biopsia/métodos , Citodiagnóstico/métodos , Neoplasias Esofágicas/patología , Carcinoma de Células Escamosas de Esófago/patología , Esófago/patología , Estudios Transversales , Técnicas Citológicas/métodos , Neoplasias Esofágicas/diagnóstico , Carcinoma de Células Escamosas de Esófago/diagnóstico , Femenino , Humanos , Masculino , Persona de Mediana Edad , Conservadores Farmacéuticos , Estudios Prospectivos , Sensibilidad y Especificidad , Conservación de Tejido/métodosRESUMEN
Resumen Introducción: El cáncer de células escamosas (CCE) es el segundo cáncer de piel más frecuente. Sin embargo, no hay publicaciones en Chile sobre el tema. Objetivo: Investigar características sociodemográficas y clínicas del CCE en la Región de Coquimbo, Chile. Material y Métodos: Serie de casos de pacientes con diagnóstico de CCE de piel tratados en el hospital de Coquimbo, entre enero de 2006 y diciembre de 2015. Criterios de inclusión: diagnóstico histológico definitivo de CCE de piel. Criterio de exclusión: 1.- seguimiento posoperatorio menor de 12 meses; 2.- operado en otro hospital; 3.- sometido a otro tratamiento previo a la cirugía; 4.- metástasis cutáneas de un CCE mucoso; 5.- CCE con metástasis a distancia. Variables independientes: edad, género, localización, tamaño, linfonodos comprometidos, residencia costera-interior. Variables dependientes: recurrencia, factores de recurrencia, letalidad. Análisis estadístico: descriptivo y analítico con el programa SSPS. Resultados: Se registraron 2.202 casos de cáncer de piel, 1.487 basocelular (67,5%), 181 melanomas (8,2%) y 534 CCE (24,2%). 236 pacientes tienen datos completos y constituyen el informe, 153 hombres (64,8%) y 83 mujeres (35,2%). Edad: 75,5 años ± 11,7 (extremos 46-94). La localización es: cabeza 158 casos (66,9%), otras áreas expuestas 47 (20%) y no expuestas 31 (14,1%). En cabeza la localización más frecuente es mejilla 40 casos (25%), frente 29 casos (12,3%). En 119 casos (50,4%) el cáncer se presenta ulcerado y en 117, no ulcerado (49,6%); diámetro del tumor 22 milímetros (rango 3-100 mm). En 10 casos hay linfonodos clínicos (4,2%). En 12 casos (5,9%) se extirpa LNC, 2 positivos. 201 casos presentan bordes histológicos libres (85,2%) y en 35 casos, borde comprometido (14,8%). Tasa de recurrencia local 8,5% (20 casos) y ganglionar 2,1% (5 casos). Recidiva del cáncer se asocia a borde histológico comprometido: P = 0,001, IC 95% 3,12-12,19 y ulceración p = 0,01, OR 4,63; IC 1,59-13,50. Seguimiento de 36 meses (rango 12-228). Letalidad 2,56%. Conclusión: El CCE de piel extirpado precozmente con confirmación histológica de erradicación tiene buen pronóstico.
Introduction: Squamous skin cancer (SSC) is the second most frequent skin cáncer, nevertheless reports about this issue are not published in Chile. Objetive: To investigate social, demographics, and clinic characteristics of SSC in semidesertic Coquimbo Region, Chile. Material and Methods: serie of patients diagnosed and treated in Coquimbo hospital between January 2006 and December 2015. Inclussion criteria: 1.- histopathological confirmation of SSC. Exclusion criteria: 1.- follow up lesser than 12 months; 2.- operated in another hospital; 3.- submitted to another treatment prior to surgery; 4.- skin metastasis of mucous squamous carcinoma; 5.- patients with distant metástasis. Independent variables: age, gender, tumor site, tumor size, clinical lymph nodes, shore or valley residency. Dependent variable: recurrency frecuence, factors of recurrency, letality. Statistical analysis: descriptive and analytical by SSPS program. Results: 2.202 skin cancer cases were registered, 1.487 basal cells carcinoma (67.5%), 181 melanoma (8.2%) and 534 squamous cells carcinoma (24.2%). 236 patients with complete data are included in this report. There were 153 men (64.8%), and 83 women (35.2%). Mean age was 75.5 years old ± 11.7 (range 46-94). Primary site was: head 158 patients (66.9%), other sun exposed areas 47 patients (20%), and non exposed areas 31 patients. Cheek and front were the most frequents head site with 40 cases (25%) and 29 cases (12.3%), respectively. In 119 cases (50.4%) SCC was ulcerated, and 117 cases was not; primary tumor diameter was 22 millimeters (range 3-100). Clinical lymph nodes were primarily positives in 10 patients, (4.2%). In 12 cases with negative lymph nodes, sentinel limph node was resected. 2 were positives. Histological borders were tumor free in 201 patients (85.2%) and, 35 cases (14.8%) had positive histological borders. Local recurrence incidence was 8.5% (20 cases). Limph nodes recurrence was 2.1% (5 cases). Cancer recurrence was associated with histological positive borders P = 0.001, IC 95% 3.12-12.19, and ulcerated tumor p = 0.01, OR 4.63; IC 1.59-13.50. Letality was 2.56%. Mean follow up was 36 months (range 12-228 months). Conclusions: SSC has a good prognosis when primary tumor is resected early, with free histological borders resection.
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Humanos , Masculino , Femenino , Adulto , Persona de Mediana Edad , Anciano , Anciano de 80 o más Años , Adulto Joven , Neoplasias Cutáneas/epidemiología , Carcinoma de Células Escamosas/epidemiología , Neoplasias Cutáneas/cirugía , Carcinoma de Células Escamosas/cirugía , Chile/epidemiología , Epidemiología Descriptiva , Incidencia , Medición de Riesgo , Metástasis Linfática , Recurrencia Local de Neoplasia/epidemiologíaRESUMEN
INTRODUCTION: Despite improvements in surgical techniques and treatments introduced into clinical practice, the overall survival of patients with esophageal squamous cell carcinoma remains low. Several epidermal growth factor receptor inhibitors are being evaluated in the context of clinical trials, but there is little evidence of effectiveness in real-world conditions. This study aimed at assessing the effectiveness of nimotuzumab combined with onco-specific treatment in Cuban real-life patients with locally advanced or metastatic esophageal squamous cell carcinoma. METHODS: A comparative and retrospective effectiveness study was performed. The 93 patients treated with nimotuzumab were matched, with use of propensity score matching, with patients who received a diagnosis of locally advanced or metastatic squamous cell carcinoma of the esophagus in three Cuban provinces reported between 2011 and 2015 to the National Cancer Registry. The Kaplan-Meier method was used to estimate event-time distributions. Log-rank statistics were used for comparisons of overall survival between groups. A two-component mixture model assuming a Weibull distribution was fitted to assess the effect of nimotuzumab on short-term and long-term survival populations. RESULTS: There was an increase in median overall survival in patients treated with nimotuzumab (11.9 months versus 6.5 months without treatment) and an increase in the 1-year survival rate (54.0% versus 21.9% without treatment). The 2-year survival rates were 21.1% for patients treated with nimotuzumab and 0% in the untreated cohort. There were statistically significant differences in survival between groups treated and not treated with nimotuzumab, both in the short-term survival population (6.0 months vs 4.0 months, p = 0.009) and in the long-term survival population (18.0 months vs 11.0 months, p = 0.001). CONCLUSIONS: Our study shows that nimotuzumab treatment concurrent with chemoradiotherapy increases the survival of real-world patients with locally advanced or metastatic esophageal squamous cell carcinoma. Further prospective studies are required to confirm the therapeutic effectiveness of nimotuzumab in esophageal cancer.
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Anticuerpos Monoclonales Humanizados/uso terapéutico , Antineoplásicos/uso terapéutico , Carcinoma de Células Escamosas/tratamiento farmacológico , Carcinoma de Células Escamosas/radioterapia , Quimioradioterapia , Neoplasias Esofágicas/tratamiento farmacológico , Neoplasias Esofágicas/radioterapia , Adulto , Anciano , Anciano de 80 o más Años , Cuba , Carcinoma de Células Escamosas de Esófago , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Estudios RetrospectivosRESUMEN
O tumor de pele da mão corresponde ao câncer primário mais comum dessa região. Apesar de proporcionalmente cobrir uma pequena superfície do corpo, corresponde a uma parte considerável de todos os tumores de pele. O objetivo principal deste trabalho é mostrar de forma simples e clara as lesões mais prevalentes e encontradas no ambulatório médico, de uma forma que este pode ser usado para consulta e orientação do profi ssional médico das mais diversas especialidades, objetivando um diagnóstico rápido e assertivo, que interferirá positivamente no desfecho da doença. Nesta terceira parte do trabalho são abordados fundamentos, conceitos, classifi cações e abordagens para o melhor prognóstico do paciente.
Skin tumor of the hand is the most common primary cancer of this region. Although covering a proportionally small surface of the body, it accounts for a substantial part of all skin tumors. The main aim of this work is to show simply and clearly the most prevalent injuries found in the outpatient clinic, so that it can be used by healthcare providers from various specialties as a consultation and guidance resource, aiming at a quick and assertive diagnosis that will interfere positively with disease outcome. This third part of the work covers the fundamentals, concepts, classifi cations and approaches for a better prognosis.
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Humanos , Carcinoma Basocelular , Carcinoma de Células Escamosas , Neoplasias CutáneasRESUMEN
To evaluate modulatory effects of a hydroalcoholic extract of Brazilian red propolis (HERP) on dermal carcinogenesis using a murine model. METHODS: The HERP was used at concentrations of 10, 50 and 100 mg/kg (PROP10, PROP50 and PROP100, respectively) to modulate dermal carcinogenesis induced by the application of 9,10-dimetil-1,2-benzatraceno (DMBA) on the backs of animals. RESULTS: The chemical compounds identified in HERP included propyl gallate, catechin, epicatechin and formononetin. PROP100 treatment resulted in significantly decreased tumor multiplicity throughout the five weeks of tumor promotion (p<0.05), and this concentration also resulted in the highest frequency of verrucous tumors (p<0.05). All of the tumors that developed in DMBA-treated animals were regarded as squamous cell carcinomas and were either diagnosed as non-invasive verrucous carcinomas or invasive squamous cell carcinomas (SCCs). The average score for malignancy was significantly lower in the PROP100-treated group than the non-treated group (p<0.05), but there was no difference between the other groups (p>0.05). CONCLUSION: The oral administration of hydroalcoholic extract of Brazilian red propolis at a dose of 100 mg/kg had a significant modulatory effect on the formation, differentiation and progression of chemically induced squamous cell carcinoma in a murine experimental model.
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Animales , Ratas , Carcinogénesis , Neoplasias/patología , Própolis/análisis , Roedores/clasificaciónRESUMEN
To evaluate modulatory effects of a hydroalcoholic extract of Brazilian red propolis (HERP) on dermal carcinogenesis using a murine model. METHODS: The HERP was used at concentrations of 10, 50 and 100 mg/kg (PROP10, PROP50 and PROP100, respectively) to modulate dermal carcinogenesis induced by the application of 9,10-dimetil-1,2-benzatraceno (DMBA) on the backs of animals. RESULTS: The chemical compounds identified in HERP included propyl gallate, catechin, epicatechin and formononetin. PROP100 treatment resulted in significantly decreased tumor multiplicity throughout the five weeks of tumor promotion (p<0.05), and this concentration also resulted in the highest frequency of verrucous tumors (p<0.05). All of the tumors that developed in DMBA-treated animals were regarded as squamous cell carcinomas and were either diagnosed as non-invasive verrucous carcinomas or invasive squamous cell carcinomas (SCCs). The average score for malignancy was significantly lower in the PROP100-treated group than the non-treated group (p<0.05), but there was no difference between the other groups (p>0.05). CONCLUSION: The oral administration of hydroalcoholic extract of Brazilian red propolis at a dose of 100 mg/kg had a significant modulatory effect on the formation, differentiation and progression of chemically induced squamous cell carcinoma in a murine experimental model.(AU)
Asunto(s)
Animales , Ratas , Carcinogénesis , Neoplasias/patología , Própolis/análisis , Roedores/clasificaciónRESUMEN
Objetivos: Apresentar os resultados e analisar as variáveis implicadas no tratamento e prognóstico do carcinoma epidermóide do canal anal tratado através da radio e quimioterapia no Hospital Barão de Lucena-SUS-PE. Metodologia: Análise dos prontuários de pacientes com diagnóstico de câncer do canal anal submetidos a tratamento radioquimioterápico. O período de acompanhamento foi de junho de 1989 a junho de 2005. Foram incluídos os pacientes com diagnóstico histológico de câncer de canal anal, enquadrados nos estadios I, II, IIIa e IIIb, submetidos a dois ciclos de quimioterapia com 5-fluorouracil (5-FU) na dose de 1g/m²/dia em infusão contínua de 96 horas e cisplatino na dose de 100mg/m² administrado em 6 horas no segundo dia de infusão de cada ciclo, administrados na primeira e terceira semanas do esquema de tratamento radioterápico. Resultados: Avaliamos 108 prontuários de pacientes que preencheram os critérios do protocolo. O tempo médio de seguimento foi de 51 meses (1-182 meses). Houve predomínio do gênero feminino (81,5 por cento dos pacientes). A idade variou de 33 a 83 anos (média de 59 anos). O tipo histológico mais freqüente foi o carcinoma de células escamosas (80,6 por cento dos casos). Em 21 pacientes, foi diagnosticado carcinoma basalóide. Quanto ao grau de diferenciação, prevaleceu o tipo moderadamente diferenciado (61 por cento dos pacientes com carcinoma de células escamosas). O índice de resposta inicial completa foi de 89,8 por cento. Onze pacientes persistiram com tumor após o tratamento radio e quimioterápico. O índice de resposta inicial completa foi menor nos estadios IIIa e IIIb em relação aos estadios I e II com significância estatística (p<0,05). 14 pacientes evoluíram com recidiva tumoral, oito com recidiva local (7,4 por cento) e seis (5,5 por cento) com recidiva linfática e à distância. CONCLUSÕES: O tratamento radioquimioterápico exclusivo do carcinoma epidermóide do canal anal, tem índice de resposta completo bastante elevado co...
Objectives: To present the results and analyze the variables involved in the treatment and prognosis of squamous cell carcinoma of the anal canal treated by radiotherapy and chemotherapy at the Hospital Barao de Lucena-SUS-PE. Methodology: Analysis of medical records of patients diagnosed with anal cancer treated by chemoradiation. The monitoring period was from June 1989 to June 2005. We included patients with histologically confirmed cancer of the anal canal, framed in stages I, II, IIIa and IIIb, underwent two cycles of chemotherapy with 5-fluorouracil (5-FU) at a dose of 1g / m² / day continuous infusion 96 hours and cisplatin at a dose of 100 mg / m² administered at 6 hours the second day of infusion of each cycle, administered on the first and third weeks of radiotherapy treatment regimen. Results: We evaluated records of 108 patients who met the criteria of the protocol. The mean follow-up was 51 months (1-182 months). There were more females (81.5 percent of patients). The age ranged from 33 to 83 years (mean 59 years). The most common histological type was squamous cell carcinoma (80.6 percent of cases). In 21 patients, was diagnosed Basaloid carcinoma. Regarding the degree of differentiation, the most prevalent type was moderately differentiated (61 percent of patients with squamous cell carcinoma). The rate of initial complete response was 89.8 percent. Eleven patients had persistent tumor after radiotherapy and chemotherapy. The initial response rate was lower in complete stages IIIa and IIIb compared to stages I and II with statistical significance (p <0.05). 14 patients developed recurrence, eight with local recurrence (7.4 percent) and six (5.5 percent) with lymphatic recurrence and distance. CONCLUSIONS: The chemoradiation treatment of unique cell carcinoma of the anal canal, have complete response rate very high with acceptable morbidity. Surgical treatment still has its value in cases of persistent injury and / or local recurrence, with sati...
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Humanos , Quimioterapia Combinada , Estadificación de Neoplasias , Neoplasias de Células Escamosas , Neoplasias del Ano/tratamiento farmacológico , Neoplasias del Ano/radioterapiaRESUMEN
Das diversas neoplasias denominadas câncer de boca, mais de 95% tem o diagnóstico de carcinoma epidermóide (CE). O carcinoma epidermóide apresenta etiologia e patogênese complexas e não totalmente compreendidas determinando altos índices de morbidade e mortalidade. Por isso crescentes esforços têm sido empregados para a melhor compreensão dos eventos celulares, da susceptibilidade genética e dos fatores de risco que atuando em conjunto dão origem e atuam na progressão do carcinoma epidermóide de boca. Buscando novas facetas da carcinogênese oral e baseando-se no papel pró-carcinogênico que os hormônios esteróides desempenham nas neoplasias dos órgãos reprodutivos, alguns estudos passaram a avaliar o papel desses hormônios na patogênese e progressão do CE. O propósito deste trabalho foi avaliar a presença dos receptores de androgênio, estrogênio (alfa e beta) e da enzima aromatase em carcinomas epidermóides de boca (CE), através das técnicas de imuno-histoquímica, western-blotting e imunofluorescência, e comparar, com base no gênero (masculino e feminino), os resultados encontrados. Da amostra de CE utilizada, 30 eram pertencentes a pacientes do gênero feminino e 30 do masculino...
Oral squamous cell carcinoma (OSCC) is the main type of oral cancer presenting complex and not completely understood pathogenesis. OSCC implies quite significant mortality and morbidity rates and in spite of the vast amount of research and the advances in the field of oncology and surgery, the overall survival remains largely unchanged. Therefore, the identification of new pathways involved in the mechanisms of carcinogenesis can bring knowledge to the control and advent of new treatments. The role of androgens and estrogens in several endocrine-related malignancies is well known. The successful use of these hormones antagonists in the treatment of these neoplasms has prompted researches to investigate the presence of hormones receptors in other tissues and tumor types. The aim of this study was to asses through immunohistochemistry, western blot and immunoflorescence assays the expression, genderrelated, of androgen, estrogen alpha and beta receptors and aromatase enzyme in cases of OSSC. A total of 60 cases of OSCC (30 from males and 30 from females) were retrieved and submitted to immunohistochemical assay. Two OSCC cell lines were used for western blot and immunoflurescence techniques...
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Humanos , Masculino , Femenino , Aromatasa , Carcinoma de Células Escamosas/diagnóstico , Patología Bucal/métodosRESUMEN
Introducción: El cáncer colorrectal es la neoplasia más frecuente del tubo digestivo y la segunda en nuestro país en incidencia y mortalidad. El carcinoma de células escamosas de colon y recto es raro. La mayoría de los datos sobre ellos provienen de comunicaciones individuales y no se conoce mucho sobre su etiología, patogenia y pronóstico. Se presenta un caso de carcinoma escamoso primario localizado en ciego, con revisión de la literatura. Lugar de aplicación: Hospital de Alta Complejidad Presidente Juan Domingo Perón, Formosa, Argentina. Diseño: Presentación de caso clínico y revisión de la literatura. Pacientes y Métodos: Mujer de 67 años. Consulta en mayo de 2006 por anemia crónica y alteración del estado general. Presenta como antecedente anexohisterectomía por carcinoma epidermoide de cuello uterino con radioterapia adyuvante 10 años atrás. Al examen físico se palpa tumoración en fosa ilíaca derecha. La videocolonoscopía constata formación tumoral en ciego. Se toman biopsias, cuyo informe anatomopatológico revela carcinoma escamoso. Se realiza hemicolectomía derecha videolaparoscópica. Evoluciona sin complicaciones. Resultados: El protocolo de anatomía patológica informa: "Carcinoma escamoso moderadamente diferenciado infiltrante de ciego con metástasis en 12 de 14 ganglios resecados, con embolizaciones vasculares; estadificación patológica pT3-pN2-pMO / Dukes C2". Completó tratamiento adyuvante con 5 Fluorouracilo, Leucovorina y Oxaliplatino. Óbito por progresión de enfermedad a los 25 meses de seguimiento. Conclusiones: El carcinoma escamoso primario de colon y recto es una neoplasia sumamente infrecuente. La resección quirúrgica se presenta como la opción terapéutica más acertada. La efectividad de la adyuvancia no está comprobada. Su pronóstico parece ser peor que el de los adenocarcinomas para el mismo estadío.
Background: The colorectal cancer is more frequent neoplasia of the digestive tract and it is the second in our country in incidence and mortality. The squamous cell carcinoma of the colon and rectum is rare. Most of the data about them come from individual communications and is not know about its etiology, pathogenesis and prognosis. A primary squamous cell carcinoma of the colon case is submitted, it is located in the cecum with revision of the literature. Place of aplication: Hospital de Alta Complejidad Presidente Juan Domingo Perón, Formosa, Argentina. Design: Report of a case and revision of literature. Patients and Methods: Female patient of 67 years old. She consults in May of 2006 by chronic anemia and malaise. History of hysterectomy with bilateral salpingo-oophorectomy and adjuvant radiotherapy in epidermoid carcinoma of uterine cervix ten years ago. In the physical examination is felt a tumor in right iliac fosse. Videocolonoscopy shows tumor mass in cecum. Biopsies are taken, whose anatomopathologic report reveals squamous cell carcinoma. Results: A laparoscopic right colectomy is carried out. Patient evolves without complications. The protocol of anatomopathology report: "Moderately differenciated squamous cell carcinoma of the cecum with metastasis in 12 of 14 resects nodes with vascular embolizations; pathological staging pT3-pN2-pMO / Dukes C2". She completes adyuvant treatment with 5 Fluorouracil, Leucovorin and Oxaliplatin. She died at 25 months of follow up. Conclusions: Primary Squamous cell carcinoma of the colon and rectum is a rare malignancy. Surgical resection is presented like the wisest therapeutic option. Effectiveness of adjuvancy is not proven. Its prognostic seems to be worst than adenocarcinomas for the same phase.
Asunto(s)
Humanos , Masculino , Femenino , Anciano , Neoplasias Colorrectales , Carcinoma de Células Escamosas/cirugía , Carcinoma de Células Escamosas/diagnóstico , Carcinoma de Células Escamosas/patología , Colectomía/métodos , Colonoscopía/métodos , Diagnóstico por Imagen , Quimioterapia Combinada , Neoplasias del Ciego/cirugía , Neoplasias del Ciego/diagnóstico , Neoplasias del Ciego/patologíaRESUMEN
This study investigated the presence of human papillomavirus (HPV) DNA and viral types in 33 cases of oral squamous cells carcinoma (OSCC) and compared the immunohistochemical expression of the cell-cycle markers p21 and pRb between cases of the disease with and without HPV. DNA was extracted from paraffin-embedded tissue and amplified by PCR for the detection of HPV DNA. Viral typing was performed by dot blot hybridization. Immunohistochemistry was performed by the streptavidinbiotin technique. HPV DNA was detected in 11 (33.33 percent) of the 33 cases. The prevalent viral type was HPV 18 (81.81 percent). A significant association was observed between the presence of HPV and immunohistochemical expression of pRb, but not between p21 expression and the presence of the virus. The low frequency of detection of HPV DNA in OSCC suggests a possible participation of the virus in the development and progression of only a subgroup of these tumors.
Asunto(s)
Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Alphapapillomavirus/aislamiento & purificación , Carcinoma de Células Escamosas/virología , /biosíntesis , Neoplasias de la Boca/virología , Proteína de Retinoblastoma/biosíntesis , Alphapapillomavirus/genética , Brasil , Carcinoma de Células Escamosas/química , /análisis , ADN Viral/análisis , Técnicas para Inmunoenzimas , Neoplasias de la Boca/química , Hibridación de Ácido Nucleico , Reacción en Cadena de la Polimerasa , Infecciones por Papillomavirus/virología , Estudios Retrospectivos , Proteína de Retinoblastoma/análisisRESUMEN
Introdução: O acúmulo de placa bacteriana na superfície dos dentes está relacionado ao aparecimento das duas principais doenças dentárias, cárie e doença periodontal. Pacientes tratados com radioterapia de cabeça e pescoço apresentam xerostomia, que dificulta os cuidados com a boca e que requer o uso de solução de bochecho como adjunto no controle químico da placa bacteriana dental. O uso da clorexidina como bochecho já é prática comum em muitos centros de tratamengivitis, despite the fact that triclosan reduced the bacterial dental plaque level.