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1.
BMJ Case Rep ; 16(1)2023 Jan 06.
Artigo em Inglês | MEDLINE | ID: mdl-36609423

RESUMO

We present a rare case of microsurgical replantation of a total scalp avulsion. A woman in her mid-60s was renovating a tractor when her hair was caught in a column drill resulting in traumatic scalp avulsion. The avulsed scalp involved the eyebrows and the entire hair-covered part of the scalp. The prehospital management and the conservation packing of the scalp was very effective. Microsurgical replantation was achieved with anastomoses of the left superficial temporal artery and one temporal vein on each side. The combination of the prehospital treatment and our university hospital setup made it possible to reattach the scalp with an ischaemia time of approximately 5 hours. A functional and aesthetically pleasing outcome was achieved, and the patient was discharged 6 days postoperatively with a vital scalp and no complaints. Five months postoperatively, she has no sign of alopecia and is regaining sensation and function of the scalp.A woman in her mid-60s was renovating a tractor when her hair was caught in a column drill resulting in traumatic scalp avulsion. The avulsed scalp involved the eyebrows and the entire hair-covered part of the scalp. The prehospital management and the conservation packing of the scalp was very effective.


Assuntos
Amputação Traumática , Couro Cabeludo , Feminino , Humanos , Couro Cabeludo/cirurgia , Couro Cabeludo/irrigação sanguínea , Microcirurgia/métodos , Reimplante/métodos , Cabelo , Amputação Traumática/cirurgia
2.
BMJ Case Rep ; 14(10)2021 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-34706911

RESUMO

Scrotal elephantiasis (SE) is a condition considered rare in western industrialised countries but common in filaria prone regions. If no apparent causes are found for SE, it is called idiopathic SE. Medical and conservative therapies are ineffective against idiopathic SE, and surgical intervention is mandatory to treat this disabling condition. Nevertheless, it remains unclear whether surgical intervention improves quality of life among patients with idiopathic SE. Herein, we report a case of a 41-year-old man who underwent acute scrotal resection and reconstruction, secondary to haemorrhage from his idiopathic SE. The aim of this study was to describe the operative approach and assess patient satisfaction after surgical treatment. The patient had no recurrence of SE after surgical treatment at 6 months follow-up and had considerable improvements assessed by general and disease-specific quality of life questionnaires.


Assuntos
Elefantíase , Procedimentos de Cirurgia Plástica , Adulto , Elefantíase/cirurgia , Humanos , Masculino , Recidiva Local de Neoplasia , Qualidade de Vida , Escroto/cirurgia
3.
Dan Med J ; 67(8)2020 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-32741441

RESUMO

INTRODUCTION: Symptoms of the shoulder syndrome (SS) and spinal accessory nerve (SAN) impairments are well-known complications to any neck dissections (NDs). Even so, their prevalence is reported with large variations in the literature. Furthermore, marginal mandibular nerve (MMN) injuries are claimed to be underreported. The purpose of this study was to investigate the prevalence of SS, SAN and MMN injuries after different types of ND. METHODS: This systematic review and meta-analysis included studies reporting SAN and MMN injuries following the three main types of ND. Pooled estimates of the prevalence were made by the main types of ND with 95% confidence intervals (95% CI). RESULTS: Nineteen studies reported a total of 457 SAN injuries. The estimated prevalence of SS or SAN injuries following radical neck dissection, modified radical neck dissection and selective neck dissection was 94.8% (95% CI: 88.5-98.9%), 33.0% (95% CI: 19.4-48.3%) and 27.9% (95% CI: 7.1-54.5%), respectively. Five studies reported a total of 64 MMN injuries. The estimated prevalence following modified radical neck dissection and selective neck dissection was 13.1% (95% CI: 0-37.6%) and 12.7% (95% CI: 4.3-24.1%), respectively. CONCLUSIONS: This meta-analysis estimated a high prevalence of SS, SAN and MMN injuries following the three main types of ND. If oncological considerations allow it, the less morbid ND should be considered. MMN injuries have only been reported in a limited number of small studies. The results may be used to compare future research and as guidance for quality evaluation within departments.


Assuntos
Traumatismos do Nervo Acessório/epidemiologia , Traumatismos do Nervo Facial/epidemiologia , Esvaziamento Cervical/efeitos adversos , Complicações Pós-Operatórias/epidemiologia , Lesões do Ombro/epidemiologia , Nervo Acessório/cirurgia , Traumatismos do Nervo Acessório/etiologia , Traumatismos do Nervo Facial/etiologia , Humanos , Complicações Pós-Operatórias/etiologia , Prevalência , Ombro/inervação , Lesões do Ombro/etiologia
4.
Eur J Cancer ; 107: 86-92, 2019 01.
Artigo em Inglês | MEDLINE | ID: mdl-30553161

RESUMO

OBJECTIVE: The objective is to investigate the topographical distribution of sentinel nodes (SNs) and lymph node metastases in T1-2cN0 oral squamous cell carcinomas (OSCCs). METHODS: The study entailed a prospective enrolment of 220 patients with clinical T1-2N0 OSCCs who underwent preoperative lymphoscintigraphy (LSG) followed by gamma probe-guided sentinel lymph node biopsy (SLNB). Patients with positive SNs were treated with completion neck dissection. Excised lymph nodes were grouped into the neck level according to the international guidelines. RESULTS: The SN detection rate by LSG was 99.1%. Patients with midline tumours had bilateral lymphatic drainage on LSG in 15/21 (71.5%). There were 45/199 (22.6%) patients with lateralised tumours that had unexpected bilateral or contralateral drainage patterns on LSG. Fifty-five patients (25.0%) were SLNB positive, and metastases were found in 72/781 (9.2%) of the excised SNs. Metastatic involvement of neck level IV was rare and only observed in patients with anterior tongue cancer. No patients had level V involvement. Eleven patients developed isolated cervical recurrences, with no new primary tumour as origin. The SLNB procedure ensured an overall sensitivity of 83.3% and a negative predictive value of 93.3%. CONCLUSION: Completion neck dissection of level I-III in SLNB-positive patients might be sufficient in most patients with OSCC except patients with anterior tongue cancer, but further studies are needed to support this potential therapeutic algorithm. Our study showed that SLNB was helpful in clarifying unexpected bilateral or contralateral metastatic drainage patterns. In our cohort, 8/55 patients with occult metastasis would have been missed by elective neck dissection of the ipsilateral neck.


Assuntos
Carcinoma de Células Escamosas/secundário , Neoplasias Bucais/patologia , Linfonodo Sentinela/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Escamosas/diagnóstico por imagem , Carcinoma de Células Escamosas/cirurgia , Feminino , Seguimentos , Humanos , Metástase Linfática , Linfocintigrafia , Masculino , Pessoa de Meia-Idade , Neoplasias Bucais/diagnóstico por imagem , Neoplasias Bucais/cirurgia , Estadiamento de Neoplasias , Estudos Prospectivos , Linfonodo Sentinela/diagnóstico por imagem , Linfonodo Sentinela/cirurgia , Biópsia de Linfonodo Sentinela
5.
Oncotarget ; 8(5): 8206-8214, 2017 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-28030794

RESUMO

MicroRNAs (miRNAs) are small regulatory non-coding RNAs for which altered expression in cancers can serve as potential biomarkers for diseases. We here investigated whether circulating miRNAs can serve as biomarkers for predicting post-operational recurrence of oral squamous cell carcinoma (OSCC) in patients. Plasma samples from 8 Danish OSCC patients were collected before, and one year after surgical operation, as well as from 3 Danish healthy controls and subjected to miRNA profiling by next generation sequencing. Disease recurrence did not occur in the 8 patients when the post-operative plasma samples were collected. Based on the sequencing data, three up-regulated miRNAs (miR-148a-3p, miR-26a-5p and miR-21-5p) and three down-regulated miRNAs (miR-375, miR-92b-3p and miR-486-5p) in the OSCC samples compared to healthy controls were selected for qRT-PCR validation in a Chinese cohort of 20 plasma samples collected before, and 9-12 months after surgical operation, and 18 healthy controls. Disease recurrence had occurred in 8 out of the 20 Chinese patients at the time their post-operative plasma samples were collected. The results of qRT-PCR showed that down-regulation of miR-486-5p, miR-375 and miR-92b-3p were highly associated with OSCC recurrence. This study indicates that the plasma miRNA profile is altered in OSCC during its progression and can be used to monitor the likelihood of OSCC recurrence in patients after surgery.


Assuntos
Biomarcadores Tumorais/genética , Carcinoma de Células Escamosas/genética , Carcinoma de Células Escamosas/cirurgia , MicroRNA Circulante/genética , Neoplasias de Cabeça e Pescoço/genética , Neoplasias de Cabeça e Pescoço/cirurgia , Neoplasias Bucais/genética , Neoplasias Bucais/cirurgia , Recidiva Local de Neoplasia , RNA Neoplásico/genética , Idoso , Idoso de 80 Anos ou mais , Biomarcadores Tumorais/sangue , Carcinoma de Células Escamosas/sangue , Carcinoma de Células Escamosas/patologia , Estudos de Casos e Controles , China , MicroRNA Circulante/sangue , Dinamarca , Intervalo Livre de Doença , Feminino , Perfilação da Expressão Gênica/métodos , Neoplasias de Cabeça e Pescoço/sangue , Neoplasias de Cabeça e Pescoço/patologia , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Bucais/sangue , Neoplasias Bucais/patologia , Reação em Cadeia da Polimerase , Valor Preditivo dos Testes , RNA Neoplásico/sangue , Reprodutibilidade dos Testes , Fatores de Risco , Carcinoma de Células Escamosas de Cabeça e Pescoço , Fatores de Tempo , Transcriptoma , Resultado do Tratamento
6.
Clin Nucl Med ; 41(7): 534-42, 2016 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-27088386

RESUMO

PURPOSE: Nuclear imaging plays a crucial role in lymphatic mapping of oral cancer. This evaluation represents a subanalysis of the original multicenter SENT trial data set, involving 434 patients with T1-T2, N0, and M0 oral squamous cell carcinoma. The impact of acquisition techniques, tracer injection timing relative to surgery, and causes of false-negative rate were assessed. METHODS: Three to 24 hours before surgery, all patients received a dose of Tc-nanocolloid (10-175 MBq), followed by lymphoscintigraphy. According to institutional protocols, all patients underwent preoperative dynamic/static scan and/or SPECT/CT. RESULTS: Lymphoscintigraphy identified 723 lymphatic basins. 1398 sentinel lymph nodes (SNs) were biopsied (3.2 SN per patient; range, 1-10). Dynamic scan allowed the differentiation of sentinel nodes from second tier lymph nodes. SPECT/CT allowed more accurate anatomical localization and estimated SN depth more efficiently. After pathological examination, 9.9% of the SN excised (138 of 1398 SNs) showed metastases. The first neck level (NL) containing SN+ was NL I in 28.6%, NL IIa in 44.8%, NL IIb in 2.8%, NL III in 17.1%, and NL IV in 6.7% of positive patients. Approximately 96% of positive SNs were localized in the first and second lymphatic basin visualized using lymphoscintigraphy. After neck dissection, the SN+ was the only lymph node containing metastasis in approximately 80% of patients. CONCLUSIONS: Best results were observed using a dynamic scan in combination with SPECT/CT. A shorter interval between tracer injection, imaging, and surgery resulted in a lower false-negative rate. At least 2 NLs have to be harvested, as this may increase the detection of lymphatic metastases.


Assuntos
Carcinoma de Células Escamosas/diagnóstico por imagem , Carcinoma de Células Escamosas/secundário , Metástase Linfática/diagnóstico por imagem , Linfocintigrafia/métodos , Neoplasias Bucais/diagnóstico por imagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Escamosas/patologia , Feminino , Humanos , Linfonodos/patologia , Metástase Linfática/patologia , Masculino , Pessoa de Meia-Idade , Neoplasias Bucais/patologia , Pescoço/patologia , Medicina Nuclear , Cintilografia , Compostos Radiofarmacêuticos/administração & dosagem , Linfonodo Sentinela/diagnóstico por imagem , Tomografia Computadorizada com Tomografia Computadorizada de Emissão de Fóton Único , Inquéritos e Questionários
7.
J Oral Maxillofac Surg ; 74(8): 1687-94, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26973223

RESUMO

PURPOSE: The purpose of this systematic review was to describe the efficacy of smoking cessation counseling and the resulting quit rate in patients with head and neck cancer. MATERIALS AND METHODS: A systematic literature search was conducted in the PubMed, Embase, and Cochrane databases. Predictor variables were smoking cessation counseling and smoking cessation interventions. The outcome was smoking cessation. Data collection and quality assessment were performed independently by 2 of the authors. Selected publications were assessed for potential risk of bias, and the level of evidence was evaluated using National Health and Medical Research Council guidelines. Review Manager 5.3 was used to conduct the meta-analysis. RESULTS: Eight studies involving 1,239 patients were included (3 randomized controlled trials, 3 cohorts, and 2 case series). Smoking cessation was achieved considerably more often in patients who received smoking cessation counseling compared with those who received usual care. CONCLUSIONS: This review shows that counseling supplemented with nicotine replacement therapy increases the possibility for smoking cessation in patients with head and neck cancer.


Assuntos
Aconselhamento , Neoplasias de Cabeça e Pescoço , Abandono do Hábito de Fumar , Humanos
8.
World J Surg Oncol ; 14(1): 9, 2016 Jan 13.
Artigo em Inglês | MEDLINE | ID: mdl-26758903

RESUMO

BACKGROUND: Recurrent lymphocele following groin dissection is generally a self-limiting condition, but in a few cases, the lymphocele persists and for this, there are not many options. Few reports have proposed the efficacy of lymph vessel ligation with patent blue as a vessel locator. We have used this technique since 2007 in our very severe cases and herein present our results. METHODS: The study was a retrospective case series in a university hospital setting. All patients who had this procedure performed were included from the first procedure performed in 2007 until August 2015, and their data was retrieved from electronic patient records. RESULTS: In total, eight patients had this procedure performed for a total of ten inguinal regions. In all regions, leaking lymph vessels were easily found by the blue color and a median of 3 (range 1-5 vessels) vessels per region were ligated using titanium clips. For two patients, there was still a need for puncture which lasted 13-37 days postoperatively. For the remaining patients, there was an immediate stop in lymphocele formation but one patient developed a lymphatic malformation which after removal resulted in the recurrence of lymphocele and had the procedure performed again with immediate effect. CONCLUSIONS: Ligation of lymph vessels for the treatment of recurrent inguinal lymphoceles appears to be an appropriate treatment modality that is both quick and easy to perform with minimum risk, and in most cases, it results in immediate complete stop in the lymphocele formation.


Assuntos
Virilha/cirurgia , Excisão de Linfonodo , Vasos Linfáticos/cirurgia , Linfocele/cirurgia , Complicações Pós-Operatórias/cirurgia , Adulto , Idoso , Feminino , Humanos , Ligadura , Linfocele/etiologia , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Resultado do Tratamento
9.
BJU Int ; 117(2): 235-43, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25810028

RESUMO

OBJECTIVES: To estimate the diagnostic accuracy of sentinel lymph node biopsy (SNB) in patients with penile cancer and assess SNB complications in a national multicentre setting. PATIENTS AND METHODS: Retrospectively data were collected from records in four university centres by one medical doctor covering all SNBs performed in Denmark between 1 January 2000 and 31 December 2010. Patients had either impalpable lymph nodes (LNs) in one or both groins, or had a palpable inguinal mass from which aspiration cytology failed to reveal malignancy. Patients were injected with nanocolloid technetium and had a scintigram recorded before the SNB. The primary endpoint was LN recurrence on follow-up. The secondary endpoint was complications after SNB. Diagnostic accuracy was computed. RESULTS: In all, 409 groins in 222 patients were examined by SNB. The median (interquartile range) follow-up of patients who survived was 6.6 (5-10) years. Of 343 negative groins, eight were false negatives. The sensitivity was 89.2% (95% confidence interval 79.8-95.2%) per groin. Interestingly, four of 67 T1G1 patients had a positive SNB. In all, 28 of 222 (13%) patients had complications of Clavien-Dindo grade I-IIIa. CONCLUSION: Penile cancer SNB with a close follow-up stages LN involvement reliably and has few complications in a national multicentre setting. Inguinal LN dissection was avoided in 76% of patients.


Assuntos
Carcinoma de Células Escamosas/diagnóstico por imagem , Recidiva Local de Neoplasia/diagnóstico por imagem , Recidiva Local de Neoplasia/patologia , Neoplasias Penianas/diagnóstico por imagem , Cintilografia , Biópsia de Linfonodo Sentinela/métodos , Idoso , Carcinoma de Células Escamosas/patologia , Dinamarca/epidemiologia , Seguimentos , Humanos , Excisão de Linfonodo , Linfonodos/diagnóstico por imagem , Linfonodos/patologia , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Neoplasias Penianas/patologia , Neoplasias Penianas/cirurgia , Valor Preditivo dos Testes , Estudos Retrospectivos , Centros de Atenção Terciária , Resultado do Tratamento
10.
Eur J Cancer ; 51(18): 2777-84, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26597442

RESUMO

PURPOSE: Optimum management of the N0 neck is unresolved in oral cancer. Sentinel node biopsy (SNB) can reliably detect microscopic lymph node metastasis. The object of this study was to establish whether the technique was both reliable in staging the N0 neck and a safe oncological procedure in patients with early-stage oral squamous cell carcinoma. METHODS: An European Organisation for Research and Treatment of Cancer-approved prospective, observational study commenced in 2005. Fourteen European centres recruited 415 patients with radiologically staged T1-T2N0 squamous cell carcinoma. SNB was undertaken with an average of 3.2 nodes removed per patient. Patients were excluded if the sentinel node (SN) could not be identified. A positive SN led to a neck dissection within 3 weeks. Analysis was performed at 3-year follow-up. RESULTS: An SN was found in 99.5% of cases. Positive SNs were found in 23% (94 in 415). A false-negative result occurred in 14% (15 in 109) of patients, of whom eight were subsequently rescued by salvage therapy. Recurrence after a positive SNB and subsequent neck dissection occurred in 22 patients, of which 16 (73%) were in the neck and just six patients were rescued. Only minor complications (3%) were reported following SNB. Disease-specific survival was 94%. The sensitivity of SNB was 86% and the negative predictive value 95%. CONCLUSION: These data show that SNB is a reliable and safe oncological technique for staging the clinically N0 neck in patients with T1 and T2 oral cancer. EORTC Protocol 24021: Sentinel Node Biopsy in the Management of Oral and Oropharyngeal Squamous Cell Carcinoma.


Assuntos
Carcinoma de Células Escamosas/secundário , Neoplasias de Cabeça e Pescoço/patologia , Linfonodos/patologia , Neoplasias Bucais/patologia , Biópsia de Linfonodo Sentinela , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Escamosas/mortalidade , Carcinoma de Células Escamosas/terapia , Quimiorradioterapia Adjuvante , Intervalo Livre de Doença , Europa (Continente) , Reações Falso-Negativas , Feminino , Neoplasias de Cabeça e Pescoço/mortalidade , Neoplasias de Cabeça e Pescoço/terapia , Humanos , Estimativa de Kaplan-Meier , Linfonodos/cirurgia , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Neoplasias Bucais/mortalidade , Neoplasias Bucais/terapia , Esvaziamento Cervical , Micrometástase de Neoplasia , Estadiamento de Neoplasias , Valor Preditivo dos Testes , Modelos de Riscos Proporcionais , Estudos Prospectivos , Radioterapia Adjuvante , Fatores de Risco , Biópsia de Linfonodo Sentinela/efeitos adversos , Carcinoma de Células Escamosas de Cabeça e Pescoço , Fatores de Tempo , Resultado do Tratamento
11.
Ugeskr Laeger ; 177(20)2015 May 11.
Artigo em Dinamarquês | MEDLINE | ID: mdl-25967248

RESUMO

Surgical treatment of obesity has led to a large group of patients with massive weight loss. The massive weight loss results in excessive skin, which leads to pain, skin problems, cosmetic discomfort and psychosocial issues. The impact on quality of life of bariatric and body contouring surgery can be measured by patient-specific, well-constructed psychometrically validated patient-reported outcome measures. A new patient-reported outcome measure, the Body-Q, has been translated for use in Danish patients.


Assuntos
Cirurgia Bariátrica/psicologia , Obesidade , Satisfação do Paciente , Dinamarca , Procedimentos Cirúrgicos Dermatológicos , Humanos , Obesidade/psicologia , Obesidade/cirurgia , Avaliação de Resultados da Assistência ao Paciente , Qualidade de Vida , Procedimentos de Cirurgia Plástica , Traduções , Redução de Peso
12.
Dan Med J ; 62(3)2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25748863

RESUMO

INTRODUCTION: Facial palsy is a debilitating condition entailing both cosmetic and functional limitations. Static suspension procedures can be performed when more advanced dynamic techniques are not indicated. Since 2006, we have used a double-layered palmaris longus tendon graft through an ovular skin excision in the nasolabial fold for access. The aim of this paper is to present our surgical technique and case series. METHODS: This study was a retrospective case series in a university hospital setting. All patients who had this procedure performed were included before August 2013. Data from electronic patient records were retrieved, patients were invited for a follow-up visit and results were measured using the Lip Reanimation Outcomes Questionnaire. Furthermore, standardised photographs were taken and evaluated by multiple surgeons. RESULTS: A total of 13 patients were included with a mean follow-up of 49 months (range: 3-89 months). 93% noted an improvement of their facial appearance at follow-up. Seven out of 11 patients with preoperative problems with speech noted an improvement at follow-up. Eight out of 12 patients with preoperative problems with oral competence noted an improvement at follow-up. Photographic evaluation revealed an acceptable symmetry at rest with an increasing asymmetry with increasing smile intensity. No post-operative complications or donor site morbidity was noted in any of our patients. CONCLUSION: Our technique is easy to perform with no noteworthy complications, and it improves the quality of life of patients with facial palsy. It is an acceptable alternative when more advanced procedures are not indicated. FUNDING: not relevant. TRIAL REGISTRATION: not relevant.


Assuntos
Paralisia Facial/cirurgia , Transferência Tendinosa/métodos , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Qualidade de Vida , Estudos Retrospectivos , Inquéritos e Questionários , Resultado do Tratamento , Punho
13.
Head Neck ; 34(11): 1580-5, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22290737

RESUMO

BACKGROUND: The role of sentinel node biopsy in head and neck cancer is currently being explored. Patients with positive sentinel nodes were investigated to establish if additional metastases were present in the neck, their distribution, and their impact on outcome. METHODS: In all, 109 patients (n = 109) from 15 European centers, with cT1/2,N0 tumors, and a positive sentinel lymph node were identified. Kaplan-Meier and univariate and multivariate logistic regression analysis were used to identify variables that predicted for additional positive nodes and their position within the neck. RESULTS: A total of 122 neck dissections were performed in 109 patients. Additional positive nodes were found in 34.4% of cases (42/122: 18 same, 21 adjacent, and 3 nonadjacent neck level). Additional nodes, especially if outside the sentinel node basin, had an impact on outcome. CONCLUSIONS: The results are preliminary but suggest that both the number and the position of positive sentinel nodes may identify different prognostic groups that may allow further tailoring of management plans.


Assuntos
Carcinoma de Células Escamosas/patologia , Neoplasias de Cabeça e Pescoço/patologia , Linfonodos/patologia , Metástase Linfática/patologia , Neoplasias Bucais/patologia , Biópsia de Linfonodo Sentinela/métodos , Carcinoma de Células Escamosas/cirurgia , Feminino , Neoplasias de Cabeça e Pescoço/cirurgia , Humanos , Linfonodos/cirurgia , Masculino , Pessoa de Meia-Idade , Neoplasias Bucais/cirurgia , Esvaziamento Cervical , Prognóstico , Carcinoma de Células Escamosas de Cabeça e Pescoço , Análise de Sobrevida
14.
PLoS One ; 6(11): e27840, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-22132151

RESUMO

BACKGROUND: MicroRNA (miRNA) expression is broadly altered in cancer, but few studies have investigated miRNA deregulation in oral squamous cell carcinoma (OSCC). Epigenetic mechanisms are involved in the regulation of >30 miRNA genes in a range of tissues, and we aimed to investigate this further in OSCC. METHODS: TaqMan® qRT-PCR arrays and individual assays were used to profile miRNA expression in a panel of 25 tumors with matched adjacent tissues from patients with OSCC, and 8 control paired oral stroma and epithelium from healthy volunteers. Associated DNA methylation changes of candidate epigenetically deregulated miRNA genes were measured in the same samples using the MassArray® mass spectrometry platform. MiRNA expression and DNA methylation changes were also investigated in FACS sorted CD44(high) oral cancer stem cells from primary tumor samples (CSCs), and in oral rinse and saliva from 15 OSCC patients and 7 healthy volunteers. RESULTS: MiRNA expression patterns were consistent in healthy oral epithelium and stroma, but broadly altered in both tumor and adjacent tissue from OSCC patients. MiR-375 is repressed and miR-127 activated in OSCC, and we confirm previous reports of miR-137 hypermethylation in oral cancer. The miR-200 s/miR-205 were epigenetically activated in tumors vs normal tissues, but repressed in the absence of DNA hypermethylation specifically in CD44(high) oral CSCs. Aberrant miR-375 and miR-200a expression and miR-200c-141 methylation could be detected in and distinguish OSCC patient oral rinse and saliva from healthy volunteers, suggesting a potential clinical application for OSCC specific miRNA signatures in oral fluids. CONCLUSIONS: MiRNA expression and DNA methylation changes are a common event in OSCC, and we suggest miR-375, miR-127, miR-137, the miR-200 family and miR-205 as promising candidates for future investigations. Although overall activated in OSCC, miR-200/miR-205 suppression in oral CSCs indicate that cell specific silencing of these miRNAs may drive tumor expansion and progression.


Assuntos
Carcinoma de Células Escamosas/genética , Metilação de DNA/genética , MicroRNAs/genética , Neoplasias Bucais/genética , Idoso , Idoso de 80 Anos ou mais , Análise por Conglomerados , Epigênese Genética , Feminino , Perfilação da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Saúde , Humanos , Masculino , MicroRNAs/metabolismo , Pessoa de Meia-Idade , Células-Tronco Neoplásicas/metabolismo , Células-Tronco Neoplásicas/patologia , Saliva/metabolismo
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