RESUMO
BACKGROUND: Cosmetic approaches to midface aging are complex and vary in their treatment methodology. The nature of cosmetic surgery limits clinical trial data, forcing surgeons to rely on small studies and professional preferences when choosing an approach. Our study aimed to quantitatively assess national trends in midface rejuvenation practices. METHODS: We conducted a cross-sectional study consisting of a survey administered through the American Academy of Facial Plastic and Reconstructive Surgery and the American Society of Plastic Surgeons listservs. To evaluate trends, techniques were grouped into 2 categories: minimally invasive (injectable fillers, fat transfer, fat repositioning) or invasive (deep plane facelift, subperiosteal lift, malar/cheek alloplastic implant, bone grafting/bone advancement). RESULTS: Two hundred thirty-two survey responses were received. Of the total respondents, 46.52% were certified by the American Board of Facial Plastic and Reconstructive Surgery, and 48.26% were certified by the American Board of Plastic Surgery. Minimally invasive techniques were far more preferred (66.67%) over invasive (33.33%) techniques, with injectable fillers as the most common technique (34.88%), followed by fat transfer (20.93%). Deep plane facelift was preferred over subperiosteal lift (18.60% vs 7.91%, respectively). Surgeons board certified by the American Board of Facial Plastic and Reconstructive Surgery were more inclined to perform invasive techniques over those board certified by the American Board of Plastic Surgery (P = 0.0427). CONCLUSION: This study quantitatively assessed national trends in cosmetic approaches to midface aging. Our data suggest that trends among surgeons across the United States have shifted toward favoring minimally invasive techniques over more invasive approaches.
Assuntos
Procedimentos de Cirurgia Plástica , Ritidoplastia , Humanos , Estados Unidos , Rejuvenescimento , Estudos Transversais , Face/cirurgia , Ritidoplastia/métodosRESUMO
OBJECTIVE: There is hesitation to offer pediatric patients rhinoplasty due to concerns about postoperative effect on midface growth. A cross-sectional survey of members of the American Academy of Facial Plastic and Reconstructive Surgery was conducted regarding practice information and attitudes towards pediatric septorhinoplasty. The goal of the study is to describe the current attitudes on pediatric septorhinoplasty. STUDY DESIGN: Cross-sectional survey. SETTING: Community members of the American Academy of Facial Plastic and Reconstructive Surgery society. METHODS: A 19-question survey was distributed to surgeons surveying background information and current attitudes towards pediatric septorhinoplasty practices. Fisher's exact tests were implemented using Monte Carlo methods. RESULTS: There were 94 total respondents. A majority believed septorhinoplasty is safe in patients <16 years of age (n = 68, 72.34 %) with most choosing either 16 years (n = 30, 31.91 %) or 14 years (n = 29, 30.85 %) as the minimum age to consider the procedure. A majority of respondents would not perform any nasal procedures in patients ≤12 years (n = 40, 43.48 %). CONCLUSION: Trends in pediatric rhinoplasty practices have evolved overtime. Despite prior beliefs and studies cautioning against performing septorhinoplasty in pediatric patients (<16 years of age), a majority of practicing facial plastic surgeons believe that pediatric septorhinoplasty can be performed in patients >14 years old. LEVEL OF EVIDENCE: IV.
Assuntos
Procedimentos de Cirurgia Plástica , Rinoplastia , Cirurgiões , Cirurgia Plástica , Humanos , Estados Unidos , Criança , Adolescente , Rinoplastia/métodos , Estudos Transversais , Inquéritos e Questionários , Face/cirurgia , Cirurgia Plástica/métodosRESUMO
The nose is one of the most common sites of facial injury due to its prominence and anatomical placement. Given its intricate anatomy, function, and high visibility, it also proves to be one of the most complex regions for repair. We provide a review of the management of soft tissue injuries to the nose, including the various reconstructive tools available and adjunctive wound care measures. We also discuss special considerations based on mechanism of injury and treatment of this condition in the pediatric population. The main goals of reconstruction should be to preserve function while achieving optimal cosmetic results in this highly visible region of the face.
Assuntos
Traumatismos Faciais , Procedimentos de Cirurgia Plástica , Lesões dos Tecidos Moles , Criança , Traumatismos Faciais/cirurgia , Humanos , Nariz/lesões , Nariz/cirurgia , Lesões dos Tecidos Moles/cirurgiaRESUMO
Keloids present a challenging clinical problem due to their propensity for recurrence and need for adjuvant therapy. We present a case where a large keloid resection required free tissue transfer and immediate radiation therapy was employed 24 hours postoperatively. There were no significant issues with flap survival, wound healing, or recurrence 2 years postoperatively. This is the first case report of successful radiation treatment 1 day after reconstruction of the head and neck with a free flap. Laryngoscope, 131:E1818-E1820, 2021.
Assuntos
Retalhos de Tecido Biológico/transplante , Queloide/radioterapia , Queloide/cirurgia , Pescoço , Terapia Combinada , Humanos , Queloide/diagnóstico por imagem , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , CicatrizaçãoRESUMO
OBJECTIVE: To determine whether surgical case volume is a predictive factor of surgical outcomes when managing geriatric patients with head andneck cancer. METHODS: A cross-sectional study design was used. Data were obtainedfrom the Vizient Database, which included a total of 93 academicinstitutions. Men and women aged between 65 and 100 years undergoing head and neck cancer surgery during 2009 and 2012,excluding cases of thyroid cancer and skin cancer of the head and neck(n = 4544) were included in the study. Hospital case volume was definedas low (≤21 cases/year), moderate (22-49 cases/year), or high (≥50 cases/year). The frequency of comorbidities and complications wasmeasured by hospital case volume using a χ2 test. Significancewas determined with an α level of .05. RESULTS: The largest number of head and neck cancer cases involving comorbidities (90.54%) and the highest rate of overall complications(27.50%) occurred in moderate case volume institutions compared to athe complication rate of 22.89% in low volume hospitals and 21.50% in highvolume hospitals (P < .0001). The most common comorbidities across all3 hospital case volumes included hypertension, metastatic cancer,and chronic pulmonary disease and the most common complicationsincluded hemorrhage/hematoma and postoperative pulmonarycompromise. CONCLUSION: With more geriatric patients requiring surgery for head andneck cancer, it would be beneficial to manage the more complex cases at high volume centers and to develop multidisciplinary teams to optimizecase management and minimize complications.
Assuntos
Neoplasias de Cabeça e Pescoço/cirurgia , Hospitais com Alto Volume de Atendimentos/estatística & dados numéricos , Hospitais com Baixo Volume de Atendimentos/estatística & dados numéricos , Procedimentos Cirúrgicos Otorrinolaringológicos/estatística & dados numéricos , Complicações Pós-Operatórias/epidemiologia , Idoso , Idoso de 80 Anos ou mais , Comorbidade , Estudos Transversais , Bases de Dados Factuais , Feminino , Humanos , Masculino , Procedimentos Cirúrgicos Otorrinolaringológicos/efeitos adversos , Complicações Pós-Operatórias/etiologia , Estados Unidos/epidemiologiaRESUMO
OBJECTIVE: Fibula free tissue transfer is a common and reliable method for mandibular reconstruction. Functional outcomes from this procedure are dependent on the successful union of the osseous segments postoperatively. This study was conducted to define the maximum gap-size criteria for osseous union to occur at osteotomy sites in fibula free flap reconstruction of the mandible. STUDY DESIGN: Retrospective chart review. SETTING: Tertiary care academic center. SUBJECTS AND METHODS: A retrospective chart review of computed tomography and medical records was conducted on patients who underwent fibula free flap surgery and had imaging of the mandible at <3 months and >6 months after surgery. Distances between osteotomies were measured and evaluated for interval healing. Secondary data included subject age, sex, smoking status, diabetes, number of osteotomies, complications, and adjuvant therapy. RESULTS: Thirty-eight osteotomy sites were analyzed from thirteen subjects and a total of 190 measurements were made. The mean gap size at the first scan that demonstrated union by the second scan interval was 1.31 mm and mean gap size demonstrating non-union was 2.55 mm (p < 0.01). Complication rate, number of osetotomies, adjuvant therapy, or medical co-morbidities did not significantly affect rates of union. CONCLUSIONS: In this study, osseous union was achieved with a mean osteotomy gap size of 1.31 mm. The data suggests that distances between ossesous segments >2 .55mm have a higher risk of non-union. We believe the information from this study will help augment current and future techniques in the field of mandible reconstruction.
Assuntos
Transplante Ósseo/métodos , Fíbula/cirurgia , Retalhos de Tecido Biológico , Mandíbula/cirurgia , Osteotomia Mandibular/métodos , Procedimentos de Cirurgia Plástica/métodos , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos RetrospectivosRESUMO
Calcifying epithelial odontogenic tumor (CEOT) is a rare neoplasm, which accounts for < 1% of all odontogenic tumors. CEOT occurs more frequently in adults with a peak incidence in the 5th decade of life and is extremely rare in the pediatric population. We present a case of a 13-year-old girl who was found to have a mandibular CEOT. We summarize the radiological features, pathological findings, clinical management and literature review focusing on this entity in children.
Assuntos
Tumores Odontogênicos/patologia , Neoplasias Cutâneas/patologia , Adolescente , Feminino , HumanosRESUMO
OBJECTIVE: To determine if adjuvant radiation therapy for patients with pT2N0 oral cavity tongue cancer affects overall survival. STUDY DESIGN: Retrospective cohort study. SETTING: National Cancer Database. SUBJECTS AND METHODS: Cases diagnosed between 2004 and 2013 with pathologic stage pT2N0 oral cavity tongue cancer with negative surgical margins were extracted from the National Cancer Database. Data were stratified by treatment received, including surgery only and surgery + postoperative radiation therapy. Univariate analysis was performed with a 2-sample t test, chi-square test, or Fisher exact test and log-rank test, while multivariate analysis was performed with Cox regression models adjusted for individual variables as well as a propensity score. RESULTS: A total of 934 patients were included in the study, with 27.5% of patients receiving surgery with postoperative radiation therapy (n = 257). In univariate analysis, there was no significant difference in 3-year overall survival between the patient groups ( P = .473). In multivariate analysis, there was no significant difference in survival between the treatment groups, with adjuvant radiation therapy having a hazard ratio of 0.93 (95% CI, 0.60-1.44; P = .748). Regarding tumors with a depth of invasion >5 mm, there was no survival benefit for the patients who received postoperative radiation therapy as compared with those who received surgery alone (hazard ratio = 0.93; 95% CI, 0.57-1.53; P = .769). CONCLUSION: An overall survival benefit was not demonstrated for patients who received postoperative radiation therapy versus surgery alone for pT2N0 oral cavity tongue cancer, irrespective of depth of tumor invasion.
Assuntos
Glossectomia/métodos , Margens de Excisão , Neoplasias da Língua/mortalidade , Neoplasias da Língua/radioterapia , Adulto , Idoso , Análise de Variância , Estudos de Coortes , Intervalo Livre de Doença , Feminino , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Neoplasias Bucais/mortalidade , Neoplasias Bucais/patologia , Neoplasias Bucais/radioterapia , Neoplasias Bucais/cirurgia , Invasividade Neoplásica/patologia , Estadiamento de Neoplasias , Prognóstico , Pontuação de Propensão , Modelos de Riscos Proporcionais , Radioterapia Adjuvante , Estudos Retrospectivos , Programa de SEER , Estatísticas não Paramétricas , Análise de Sobrevida , Neoplasias da Língua/patologia , Neoplasias da Língua/cirurgiaRESUMO
PURPOSE: Determine whether marital status is a significant predictor of survival in human papillomavirus-positive oropharyngeal cancer. MATERIALS AND METHODS: A single center retrospective study included patients diagnosed with human papilloma virus-positive oropharyngeal cancer at Boston Medical Center between January 1, 2010 and December 30, 2015, and initiated treatment with curative intent at Boston Medical Center. Demographic data and tumor-related variables were recorded. Univariate analysis was performed using a two-sample t-test, chi-squared test, Fisher's exact test, and Kaplan Meier curves with a log rank test. Multivariate survival analysis was performed using a Cox regression model. RESULTS: A total of 65 patients were included in the study with 24 patients described as married and 41 patients described as single. There was no significant difference in most demographic variables or tumor related variables between the two study groups, except single patients were significantly more likely to have government insurance (p=0.0431). Furthermore, there was no significant difference in 3-year overall survival between married patients and single patients (married=91.67% vs single=87.80%; p=0.6532) or 3-year progression free survival (married=79.17% vs single=85.37%; p=0.8136). After adjusting for confounders including age, sex, race, insurance type, smoking status, treatment, and AJCC combined pathologic stage, marital status was not a significant predictor of survival [HR=0.903; 95% CI (0.126,6.489); p=0.9192]. CONCLUSIONS: Although previous literature has demonstrated that married patients with head and neck cancer have a survival benefit compared to single patients with head and neck cancer, we were unable to demonstrate the same survival benefit in a cohort of patients with human papilloma virus-positive oropharyngeal cancer.
Assuntos
Carcinoma de Células Escamosas/mortalidade , Carcinoma de Células Escamosas/virologia , Estado Civil , Neoplasias Orofaríngeas/mortalidade , Neoplasias Orofaríngeas/virologia , Infecções por Papillomavirus/mortalidade , Idoso , Intervalo Livre de Doença , Feminino , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Infecções por Papillomavirus/patologia , Estudos Retrospectivos , Taxa de SobrevidaRESUMO
IMPORTANCE: Nasal reconstruction after Mohs surgery is a unique challenge in that it must satisfy both functional and aesthetic goals. Despite some advocacy in the literature for using structural reinforcement to achieve both functional and aesthetic outcomes in soft-tissue reconstruction, no study has validated this claim by comparing reconstruction with and without structural support. OBJECTIVE: To evaluate the effectiveness of and need for structural reinforcement when reconstructing the nasal alar and sidewall subunits. DESIGN, SETTING, AND PARTICIPANTS: This study was a retrospective review of the medical records of 190 patients 18 years or older who underwent nasal reconstruction after Mohs surgery in a tertiary care academic center between January 1, 2013, and August 31, 2015. Data on each patient included demographics, comorbidities, smoking status, details of the lesion, size of defect, subunits involved, and reconstructive technique. Patients were divided into 2 cohorts composed of those who had reconstruction with structural reinforcement (ie, cartilage grafting or suspension suture) and those with only soft-tissue reconstruction. Patients with nasal obstruction from the functional collapse of the reconstructed area and no history of nasal obstruction were included (n = 38). Patients who had a follow-up of less than 2 months, no alar or sidewall involvement, nasal obstruction secondary to turbinate hypertrophy, septal deflection or other nonstructural causes, and incomplete documentation for analysis were excluded (n = 102). MAIN OUTCOMES AND MEASURES: Rates of postoperative nasal obstruction secondary to nasal sidewall collapse and need for revision surgery. RESULTS: Of the 38 patients who met the inclusion criteria, 22 were men and 16 were women with a mean (range) age of 64.5 (35-92) years. Twenty-three patients (61%) underwent reconstruction by a facial plastic surgeon and 15 (39%) by 2 dermatologic surgeons. Three (8%) underwent reconstruction without reinforcement and experienced postoperative nasal obstruction. The mean size of reconstructed defects that resulted in nasal valve collapse was 2.1 cm in diameter (range, 1.2-2.6 cm). Defect size was associated with incidence of postoperative nasal obstruction. For defects greater than 1.2 cm in diameter, patients reconstructed without reinforcement had a statistically significant increase of nasal obstruction secondary to functional nasal collapse compared with patients reconstructed with reinforcement (3 of 14 [21%] vs 0 of 17; 95% CI, 0.005-0.358; P = .04). CONCLUSIONS AND RELEVANCE: Nasal defects greater than 1.2 cm in diameter and involving the alar and sidewalls were associated with lower incidence of postoperative nasal obstruction when a structural reinforcement technique was used in reconstruction. The findings of this study support the structural reinforcement of the nasal functional subunits during Mohs reconstructive surgery to achieve optimal outcomes. LEVEL OF EVIDENCE: 3.
Assuntos
Cartilagem/transplante , Cirurgia de Mohs , Obstrução Nasal/prevenção & controle , Complicações Pós-Operatórias/prevenção & controle , Rinoplastia/métodos , Suturas , Adulto , Idoso , Idoso de 80 Anos ou mais , Estética , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Cartilagens Nasais/cirurgia , Reoperação , Estudos RetrospectivosRESUMO
Importance: Repairing the saddle nose deformity in the setting of granulomatosis with polyangiitis disease is a rare but challenging situation for any surgeon. Given that the available data in the literature is based on case reports and small case series, there is little evidence available to help delineate which reconstructive techniques are optimal. Objective: To examine which techniques were most successful in reconstructive rhinoplasty for a saddle nose deformity secondary to granulomatosis with polyangiitis. Evidence Review: PubMed, MEDLINE, Cochrane Collaboration Databases, and Web of Science were searched using the terms Wegener's granulomatosis or granulomatosis with polyangiitis cross-referenced with saddle nose deformity or acquired nasal deformity. These databases were supplemented with 2 cases from Boston Medical Center. Databases were queried from inception of article collection through December 14, 2015, to identify publications reporting the repair of a saddle nose deformity and granulomatosis with polyangiitis. Findings: A total of 10 studies met inclusion criteria yielding a cohort of 44 patients. The overall success rate for rhinoplasty, both primary and secondary, was 84.1% (37 of 44 patients), with a complication rate of 20%. The use of a single L-shaped graft fared better than individually placed grafts. An increased risk of graft failure was noted as the number of overall grafts increased and if nonautologous tissue was used. Conclusions and Relevance: Rhinoplasty for saddle nose deformity is a safe and effective procedure in the setting of granulomatosis with polyangiitis. In the face of this disease, reconstruction should focus on placing a robust, L-shaped strut graft with autologous tissue over individual grafts. Additionally, the use of split-calvarial bone appears to have a slightly lower complication rate over costal cartilage.
Assuntos
Granulomatose com Poliangiite/complicações , Deformidades Adquiridas Nasais/cirurgia , Rinoplastia/métodos , Estética , HumanosRESUMO
IMPORTANCE: Complications of partial flap necrosis contribute substantially to morbidity in patients who undergo head and neck reconstructive surgery. OBJECTIVE: To assess the usefulness of clinical findings, intraoperative fluorescein angiography, and intraoperative indocyanine green angiography (ICGA) for evaluation of flap skin paddle perfusion in patients undergoing oromandibular reconstruction who are at high risk of partial skin paddle necrosis. DESIGN, SETTING, AND PARTICIPANTS: Retrospective medical record review from May 21, 1996, to May 27, 2015, at a tertiary care academic medical center. Participants were 73 patients who underwent reconstruction of through-and-through defects of the mucosa, mandible, and skin using fibula free flaps that contained large bilobed skin paddles. MAIN OUTCOMES AND MEASURES: The rates of partial skin paddle necrosis and revision reconstructive surgery. RESULTS: The rates of partial flap necrosis were 8% (n = 2) among 25 patients in whom the skin paddle was trimmed based on ICGA and 33% (n = 16) among 48 patients in whom the skin paddle was trimmed according to clinical findings (P = .02). The rates of revision reconstructive surgery were 20% (5 of 25) when flap skin paddles were trimmed using ICGA and 42% (20 of 48) when trimmed per clinical findings (P = .06). CONCLUSIONS AND RELEVANCE: The use of ICGA may reduce the risk of partial skin flap necrosis in free flaps used in patients undergoing head and neck reconstruction who are at high risk of developing flap necrosis. Indocyanine green angiography imaging should be considered in any flap in which skin paddle viability is uncertain based on clinical findings and in patients in whom the skin paddle extends beyond the primary and adjacent angiosomes. LEVEL OF EVIDENCE: 3.
Assuntos
Fíbula/transplante , Retalhos de Tecido Biológico/irrigação sanguínea , Mandíbula/cirurgia , Boca/cirurgia , Procedimentos de Cirurgia Plástica , Complicações Pós-Operatórias/diagnóstico , Pele/irrigação sanguínea , Fíbula/irrigação sanguínea , Fluoresceína , Angiofluoresceinografia/métodos , Corantes Fluorescentes , Retalhos de Tecido Biológico/patologia , Retalhos de Tecido Biológico/transplante , Humanos , Verde de Indocianina , Necrose/diagnóstico , Necrose/etiologia , Procedimentos de Cirurgia Plástica/métodos , Reoperação , Estudos Retrospectivos , Pele/patologia , Transplante de PeleRESUMO
There are many factors that contribute to the aging neck. We have recently begun employing a percutaneous suture spanning the submentum combined with a posterior platysma pull. We present our initial results with this technique. In this retrospective study, subjects underwent the combined procedure with and without concomitant rhytidectomy. Cephalometric analysis was used to compare the preoperative cervicomental angle (CMA) and hyomental distance (HMD) with postoperative values at 4 weeks. Subjects also were queried on their postoperative satisfaction. Twenty-five subjects were included in this study. At 4 weeks postoperatively, we achieved significant reductions in the average CMA (134.8 versus 122.8, p = 0.002). The postoperative HMD significant increased an average of 1.9 cm (8.5 versus 10.4, p = 0.009). We achieved a 92.3% satisfaction score at 33 weeks (range = 25 to 44). The combination of a percutaneous suture across the submentum and a posterior platysma pull is a safe and effective method of addressing the many facets of the aging neck. Our initial results are easily reproducible and entail minimal morbidity to the patient.
Assuntos
Cervicoplastia/métodos , Músculos do Pescoço/cirurgia , Rejuvenescimento , Ritidoplastia/métodos , Envelhecimento da Pele , Adulto , Idoso , Cefalometria , Queixo/anatomia & histologia , Feminino , Humanos , Osso Hioide/anatomia & histologia , Lipectomia , Pessoa de Meia-Idade , Satisfação do Paciente , Estudos Retrospectivos , Suturas , Adulto JovemRESUMO
The use of poly-L-lactic acid in facial aesthetic surgery has been utilized for over a decade. More recently approved by the Food and Drug Administration as a stimulatory filler for the correction of shallow to deep facial lines, it is gaining popularity in the United States. The advantages of its use include its stimulatory action on collagen formation, the longevity of its effect, and the low side effect profile. Despite these advantages, meticulous preparation practices and injection techniques are paramount to achieving a satisfactory outcome. We review poly-L-lactic acid as a filler, along with its associated side effects, indications of use, and techniques of injection.
Assuntos
Materiais Biocompatíveis/uso terapêutico , Técnicas Cosméticas , Face/cirurgia , Poliésteres/uso terapêutico , Estética , Humanos , Envelhecimento da PeleRESUMO
BACKGROUND: Minimally invasive thyroidectomy (MIT) has gained popularity in the surgical management of benign and malignant pathology of the thyroid. One of the main benefits of utilizing this technique is the use of smaller incisions resulting in increased cosmetic satisfaction. Unfortunately, the retraction required for adequate exposure during MIT may lead to skin damage, impaired wound healing and poor cosmetic outcomes. Some have proposed that excising incision edges prior to closure may improve cosmesis. A review of the literature does not reveal any histologic evidence to support this technique. MATERIAL/METHODS: In this prospective observational study, nine subjects undergoing MIT were identified. Both the superior and inferior skin edges were excised and labeled for orientation. Specimens were sent for hematoxylin and eosin staining and histologic analysis by a staff pathologist. RESULTS: All specimens showed no significant findings such as damage to the architecture of the dermis, acute inflammation, edema or evidence of hemorrhage. Focal blood vessel ectasia within the dermis was identified in three of nine subjects. CONCLUSIONS: Our findings do not yield a histological basis supporting the routine trimming of incisions during MIT. Although no significant findings were noted histologically, further studies are warranted to investigate the long-term cosmetic outcome of MIT incisions.
Assuntos
Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Glândula Tireoide/patologia , Glândula Tireoide/cirurgia , Tireoidectomia/métodos , Adulto , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Adulto JovemRESUMO
OBJECTIVES/HYPOTHESIS: Microvascular free tissue transfer has become a mainstay of reconstruction after resections for head and neck cancer. With current techniques, free flap failure is typically low; however, failure rates have been reported as high as 10%. Most thrombotic failures occur within the first few days postoperatively and tend to involve the venous anastomoses. We evaluated the efficacy of recombinant human tissue factor pathway inhibitor (rhTFPI), an anticoagulant that directly inhibits the extrinsic coagulation pathway, using a rat model of microvenous thrombosis. STUDY DESIGN: Prospective, randomized. METHODS: Sprague-Dawley rats were randomly assigned to either rhTFPI or saline groups. We performed a venous tuck procedure in the common femoral vein. Prior to closure, the anastamosis was irrigated with either rhTPFI (20 µg/mL) or normal saline. Survival of the anastomosis was measured via clinical assessment at regular postoperative intervals. After a postoperative period of 48 hours, sites were intraoperatively assessed and the vessels harvested. RESULTS: There was a significant increase in vessel patency in rats treated topically with rhTFPI compared to controls receiving saline. There was no increase in bleeding complications in the treated group versus controls. CONCLUSIONS: Our data suggests that the use of topical rhTPFI increases venous anastomotic patency rates in vivo. The topical means of administration is attractive, as there seems to be a low percentage of systemic complications as is often seen with anticoagulation therapies. Future studies will investigate the potential efficacy in patients undergoing microvascular free tissue transfer.
Assuntos
Anticoagulantes/farmacologia , Veia Femoral/cirurgia , Lipoproteínas/farmacologia , Trombose Venosa/prevenção & controle , Anastomose Cirúrgica/métodos , Animais , Modelos Animais de Doenças , Retalhos de Tecido Biológico/irrigação sanguínea , Sobrevivência de Enxerto , Masculino , Microcirurgia/métodos , Distribuição Aleatória , Ratos , Ratos Sprague-Dawley , Valores de Referência , Medição de Risco , Sensibilidade e Especificidade , Grau de Desobstrução Vascular/efeitos dos fármacos , Grau de Desobstrução Vascular/fisiologiaAssuntos
Doenças do Aparelho Lacrimal/diagnóstico , Aparelho Lacrimal/patologia , Leucemia Linfocítica Crônica de Células B/diagnóstico , Diagnóstico Diferencial , Feminino , Humanos , Aparelho Lacrimal/cirurgia , Doenças do Aparelho Lacrimal/etiologia , Doenças do Aparelho Lacrimal/cirurgia , Leucemia Linfocítica Crônica de Células B/cirurgia , Contagem de Leucócitos , Doenças Linfáticas/etiologia , Pessoa de Meia-Idade , Sinusite/diagnóstico , Tomografia Computadorizada por Raios XRESUMO
PURPOSE: The aim of this study is to determine the ability of intratumorally delivered docetaxel to enhance the antitumor activity of adenovirus-mediated delivery of p53 (Ad-p53) in murine head and neck cancer xenograft model. MATERIALS AND METHODS: A xenograft head and neck squamous cell carcinoma mouse model was used. Mice were randomized into 4 groups of 6 mice receiving 6 weeks of biweekly intratumoral injection of (a) diluent, (b) Ad-p53 (1 x 10(10) viral particles per injection), (c) docetaxel (1 mg/kg per injection), and (d) combination of Ad-p53 (1 x 10(10) viral particles per injection) and docetaxel (1 mg/kg per injection). Tumor size, weight, toxicity, and overall and disease-free survival rates were determined. RESULTS: Intratumoral treatments with either docetaxel alone or Ad-p53 alone resulted in statistically significant antitumor activity and improved survival compared with control group. Furthermore, combined delivery of Ad-p53 and docetaxel resulted in a statistically significant reduction in tumor weight when compared to treatment with either Ad-p53 or docetaxel alone. CONCLUSION: Intratumoral delivery of docetaxel enhanced the antitumor effect of Ad-p53 in murine head and neck cancer xenograft model. The result of this preclinical in vivo study is promising and supports further clinical testing to evaluate efficacy of combined intratumoral docetaxel and Ad-p53 in treatment of head and neck cancer.
Assuntos
Adenoviridae/genética , Antineoplásicos/administração & dosagem , Neoplasias de Cabeça e Pescoço/tratamento farmacológico , Taxoides/administração & dosagem , Proteína Supressora de Tumor p53/administração & dosagem , Animais , Carcinoma de Células Escamosas/tratamento farmacológico , Docetaxel , Injeções Intralesionais , Camundongos , Ensaios Antitumorais Modelo de XenoenxertoRESUMO
OBJECTIVES: We evaluated lymphosonography, or contrast-enhanced, ultrasonography (US)-guided sentinel lymph node (SLN) detection, as a technique for demonstrating the lymphatic drainage of the thyroid gland. METHODS: In this prospective animal study, four 50-kg Yorkshire swine underwent transcutaneous injection of a US contrast agent and methylene blue dye into the thyroid gland. Contrast-enhanced US was used to identify draining lymphatic channels and SLNs. Sentinel node biopsy was conducted. Subsequently, bilateral neck and upper mediastinal dissection was carried out. RESULTS: In 3 of 4 cases, a blue dye-positive and US contrast-positive SLN was identified. We identified SLNs in level IV in 2 cases. One case revealed 2 adjacent nodes in the superior mediastinum. In 1 case, a lymphatic channel was identified traveling into the mediastinum, but exposure of the SLN could not be obtained. No residual blue dye-positive or US contrast-positive nodes were identified on subsequent dissection. CONCLUSIONS: Lymphosonography of the thyroid gland in a porcine model correlates well with blue dye-guided sentinel node biopsy and is technically feasible, although in some cases access to the SLN may be difficult. This technique could potentially enable a detailed analysis of thyroidal lymphatic drainage if applied to humans.
Assuntos
Linfa/fisiologia , Sistema Linfático/diagnóstico por imagem , Glândula Tireoide/diagnóstico por imagem , Animais , Linfonodos/diagnóstico por imagem , Estudos Prospectivos , Biópsia de Linfonodo Sentinela , Suínos , UltrassonografiaRESUMO
PURPOSE: BMS-275183 is an orally bioavailable taxane that has antitumor activity in preclinical cancer models. However, limited BMS-275183 studies have been performed in head and neck squamous cell carcinoma (HNSCC) cell lines. The purpose of this study is to identify the biological activity of BMS-275183 on HNSCC. MATERIALS AND METHODS: Head and neck squamous cell carcinoma cell lines, HN6, HN12, and HN30, were exposed to BMS-275183. BMS-275183-induced growth suppression, cell-cycle arrest, and apoptosis were measured. Then, expression of selected proteins that were induced by BMS-275183 was determined by Western blot analysis. RESULTS: BMS-275183 suppressed proliferation and induced G(2)M arrest and apoptosis in all HNSCC cell lines tested. BMS-275183 altered the expression of cell-cycle regulators, such as cyclin A and cyclin B1. The expression of E2F and p27 was decreased and increased, respectively, in all HNSCC cell lines. Cleaved caspase 3 and poly (ADP-ribose) polymerase (PARP) were increased in HN6 and HN12 cells. epidermal growth factor receptor (EGFR) and mitogen-activated protein kinase (MAPK) expression were decreased by BMS-275183 in HN6 and HN30 cell lines, whereas phosphorylated epidermal growth factor receptor (pEGFR) was decreased in only HN6 cells. CONCLUSIONS: BMS-275183 induced cellular apoptosis, cell-cycle arrest, and altered gene expression in HNSCC via molecular pathways similar to other taxanes. These preclinical experiments suggest that BMS-275183 may be useful in treating HNSCC and that the aforementioned genes can potentially be used as surrogate end-point biomarkers.