Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 70
Filtrar
1.
Am J Otolaryngol ; 45(3): 104214, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38218029

RESUMO

PURPOSE: To determine the occult nodal disease rate and whether elective regional lymph node dissection (RLND) confers any 10-year overall survival (OS) in cN0 intermediate-grade mucoepidermoid carcinoma (MEC) of the parotid gland. MATERIALS & METHODS: The National Cancer Database was reviewed from 2004 to 2016 on adults with cT1-4aN0M0 intermediate-grade parotid MEC undergoing resection with/without RLND. Comparisons between patients with and without RLND were made. Occult nodal rate and 10-year overall survival (OS) were determined. RESULTS: Out of 898 included patients with cN0 intermediate grade parotid MEC undergoing elective RLND, the occult nodal rate was 7.6%. This was significantly different from low-grade (3.9%) and high-grade (25.7%) cN0 disease. When stratified by pT-classification, marginal differences were identified between low-grade and intermediate-grade tumors, whereas high-grade tumors demonstrated increased occult nodal disease with low T-stage (pT1-pT2, 20.4% vs. 5.1%) and high T-stage (pT3-pT4a, 32.1% vs. 17.6%). Patients undergoing elective RLND were more often treated at an academic facility (53.8% vs. 41.2%), had higher pT3-pT4 tumors (19.2% vs. 10.4%), and more frequently underwent total/radical parotidectomy (46.0% vs. 29.9%) with adjuvant radiation therapy (53.8% vs. 41.0%) Cox-proportional hazard modeling did not identify RLND, regardless if stratified by nodal yield or pT-classification, nor nodal positivity as significant predictors of 10-year OS. CONCLUSIONS: The occult nodal disease in intermediate-grade parotid MEC is low and similar to low-grade. Elective RLND may have a limited impact on OS, though its effect on locoregional control remains unknown. LEVEL OF EVIDENCE: III.


Assuntos
Carcinoma Mucoepidermoide , Procedimentos Cirúrgicos Eletivos , Excisão de Linfonodo , Estadiamento de Neoplasias , Neoplasias Parotídeas , Humanos , Carcinoma Mucoepidermoide/patologia , Carcinoma Mucoepidermoide/cirurgia , Carcinoma Mucoepidermoide/mortalidade , Neoplasias Parotídeas/patologia , Neoplasias Parotídeas/cirurgia , Neoplasias Parotídeas/mortalidade , Masculino , Feminino , Pessoa de Meia-Idade , Adulto , Gradação de Tumores , Idoso , Taxa de Sobrevida , Metástase Linfática , Glândula Parótida/cirurgia , Glândula Parótida/patologia , Estudos Retrospectivos , Bases de Dados Factuais
2.
J Reconstr Microsurg ; 36(5): 369-378, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32088918

RESUMO

BACKGROUND: Sarcopenia has been implicated as a positive predictor of postsurgical complications. Its role in head and neck (H&N) free flap reconstruction has yet to be examined. Our study aimed to determine the clinical impact of sarcopenia on postoperative outcomes in patients receiving autologous free tissue reconstruction for H&N cancer (HNC). METHODS: A retrospective case-control study was conducted at our tertiary referral center. Patients with HNC who received oncologic resection followed by autologous free tissue reconstruction were included. Preoperative abdominal computed tomography (CT) imaging was analyzed at the third lumbar vertebra (L3) to calculate skeletal muscle cross-sectional area (CSA, cm2). Skeletal muscle index (SMI, cm2/m2) was calculated by normalizing CSA to patient height. Sarcopenia at L3 was defined as SMI ≤ 41.6 cm2/m2 for males and ≤ 32.0 cm2/m2 for females. Data analyses were performed to compare postoperative outcomes. RESULTS: Of the 168 patients who met inclusion criteria, 47 patients (28.0%) were determined to have preoperative sarcopenia. The sarcopenic group was older (63 vs. 58 years, p = 0.017), had lower body mass index (BMI; 21.2 vs. 27.2, p < 0.001), had greater incidence of alcohol abuse (55.3 vs. 23.1%, OR = 4.11, p < 0.001). Intraoperatively, sarcopenic patients were found to have greater rates of blood transfusions (63.8 vs. 29.8%, p < 0.001). Postoperatively, sarcopenic patients had higher rates of pneumonia (p < 0.01), venous thromboembolism (p < 0.01), prolonged ventilation (p < 0.01), delirium (p < 0.01), fistula (p < 0.05), wound disruption (p < 0.05), and longer intensive care unit stays (p < 0.05). Sarcopenic patients were ultimately found to have higher overall rates of general postoperative complications (p < 0.001) and flap-specific complications (p < 0.01). CONCLUSION: Sarcopenia was found to be a predictor of postoperative complications in H&N free flap reconstruction, signifying its value as a negative prognostic factor in surgical outcomes. This study reflects level of evidence IV.


Assuntos
Neoplasias de Cabeça e Pescoço/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Complicações Pós-Operatórias , Sarcopenia/complicações , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Retrospectivos , Fatores de Risco , Retalhos Cirúrgicos
3.
Oncologist ; 24(10): 1305-1308, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31391294

RESUMO

Identification of effective targeted therapies for recurrent/metastatic head and neck squamous cell carcinoma (HNSCC) remains an unmet medical need. A patient with platinum-refractory recurrent oral cavity HNSCC underwent comprehensive genomic profiling (CGP) that identified an activating MET mutation (R1004). The patient was treated with the oral MET tyrosine kinase inhibitor crizotinib with rapid response to treatment.Based on this index case, we determined the frequency of MET alterations in 1,637 HNSCC samples, which had been analyzed with hybrid capture-based CGP performed in the routine course of clinical care. The specimens were sequenced to a median depth of >500× for all coding exons from 182 (version 1, n = 24), 236 (version 2, n = 326), or 315 (version 3, n = 1,287) cancer-related genes, plus select introns from 14 (version 1), 19 (version 2), or 28 (version 3) genes frequently rearranged in cancer. We identified 13 HNSCC cases (0.79%) with MET alterations (4 point mutation events and 9 focal amplification events). MET-mutant or amplified tumors represent a small but potentially actionable molecular subset of HNSCC. KEY POINTS: This case report is believed to be the first reported pan-cancer case of a patient harboring a MET mutation at R1004 demonstrating a clinical response to crizotinib, in addition to the first documented case of head and neck squamous cell carcinoma (HNSCC) with any MET alteration responding to crizotinib.The positive response to MET inhibition in this patient highlights the significance of comprehensive genomic profiling in advanced metastatic HNSCC to identify actionable targetable molecular alterations as current treatment options are limited.


Assuntos
Crizotinibe/uso terapêutico , Genômica/métodos , Carcinoma de Células Escamosas de Cabeça e Pescoço/tratamento farmacológico , Crizotinibe/farmacologia , Humanos , Masculino , Pessoa de Meia-Idade , Mutação , Carcinoma de Células Escamosas de Cabeça e Pescoço/patologia
5.
Head Neck ; 2024 Apr 25.
Artigo em Inglês | MEDLINE | ID: mdl-38661244

RESUMO

BACKGROUND: Cancer cachexia is prevalent in head and neck cancer patients. The L3 skeletal muscle index (SMI) is often used to assess sarcopenia and cachexia but is infrequently able to be measured in this population. Masseter muscle thickness (MT) may serve as an alternative predictor of cachexia. METHODS: SMI and MT were calculated from 20 trauma (CTRL) and 40 cachectic (CA-CX) and non-cachectic (CA-NCX) head and neck cancer patients. Area Under the Curve of the Receiver Operating Characteristics (AUC-ROC) analysis was performed for SMI and MT. RESULTS: Both SMI and MT were significantly decreased in CA-CX patients (vs. CA-NCX mean difference -19.5 cm2/m2 and -2.06 mm, respectively) and significant predictors of CA-CX (AUC = 0.985 and 0.805, respectively). When analyzed by sex, the same findings were observed for MT in males and trended toward significance in females. CONCLUSIONS: Compared with SMI, MT is a good alternative prognostic biomarker to determine CA-CX status in HNC patients.

6.
Int J Surg Oncol ; 2024: 5339292, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38966634

RESUMO

Objective: Determine the histopathologic features that correlate with head and neck cancer (HNC) cachexia. Methods: A single-institution, retrospective study was performed on adults with HPV-negative, mucosal squamous cell carcinoma of the aerodigestive tract undergoing resection and free flap reconstruction from 2014 to 2019. Patients with distant metastases were excluded. Demographics, comorbidities, preoperative nutrition, and surgical pathology reports were collected. Comparisons of histopathologic features and cachexia severity were made. Results: The study included 222 predominantly male (64.9%) patients aged 61.3 ± 11.8 years. Cachexia was identified in 57.2% patients, and 18.5% were severe (≥15% weight loss). No differences in demographics were identified between the groups. Compared to control, patients with severe cachexia had lower serum hemoglobin (p=0.048) and albumin (p < 0.001), larger tumor diameter (p < 0.001), greater depth of invasion (p < 0.001), and elevated proportions of pT4 disease (p < 0.001), pN2-N3 disease (p=0.001), lymphovascular invasion (p=0.009), and extranodal extension (p=0.014). Multivariate logistic regression identified tumor size (OR [95% CI] = 1.36 [1.08-1.73]), oral cavity tumor (OR [95% CI] = 0.30 [0.11-0.84]), and nodal burden (OR [95% CI] = 1.16 [0.98-1.38]) as significant histopathologic contributors of cancer cachexia. Conclusions: Larger, more invasive tumors with nodal metastases and aggressive histologic features are associated with greater cachexia severity in mucosal HNC.


Assuntos
Caquexia , Neoplasias de Cabeça e Pescoço , Humanos , Caquexia/patologia , Caquexia/etiologia , Masculino , Pessoa de Meia-Idade , Feminino , Estudos Retrospectivos , Neoplasias de Cabeça e Pescoço/patologia , Neoplasias de Cabeça e Pescoço/cirurgia , Neoplasias de Cabeça e Pescoço/complicações , Idoso , Carcinoma de Células Escamosas de Cabeça e Pescoço/cirurgia , Carcinoma de Células Escamosas de Cabeça e Pescoço/patologia , Carcinoma de Células Escamosas de Cabeça e Pescoço/complicações , Prognóstico , Invasividade Neoplásica , Retalhos de Tecido Biológico
7.
Oral Oncol ; 139: 106341, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-36842197

RESUMO

OBJECTIVE: Oral leukoplakia is encountered frequently by otolaryngologists and oral and maxillofacial surgeons (OMFS). There are no consensus practice management guidelines for oral leukoplakia, resulting in heterogeneity in practice patterns. Characterization of practice patterns of providers who treat oral leukoplakia will be valuable to establish standards of care and future practice guidelines. MATERIAL AND METHODS: A survey was designed by the American Head and Neck Society Cancer Prevention Service collecting demographic and practice management data for treating oral leukoplakia. The survey was approved and distributed to members of the American Academy of Otolaryngology-Head and Neck Surgery and American Association of Oral and Maxillofacial Surgeons. Data analysis was performed using chi square and t-test where appropriate. RESULTS: 396 responses were collected: 83 OMFS, 81 head and neck fellowship-trained providers, and 232 otolaryngologists (non-head and neck fellowship-trained). Providers saw a wide volume of oral leukoplakia (23.0% >30 cases/year, 35.1% 11-30 cases/year, 41.2% 10 or less cases/year), with OMFS seeing more cases of oral leukoplakia. Factors most associated with consideration of initial biopsy included physical exam findings (94.4%), erythroplakia (82.3%), and smoking status (81.6%). The majority of respondents saw patients in follow-up within 1 month (24.8%) or within 1-3 months (46.5%). CONCLUSION: This survey identifies a range of practice patterns in initial management of oral leukoplakia, including indications for biopsy, and time for follow-up. This data provide insight into practice patterns amongst different groups of providers and can potentially lead to consensus guidelines for initial management of oral leukoplakia.


Assuntos
Otorrinolaringologistas , Otolaringologia , Humanos , Estados Unidos , Cirurgiões Bucomaxilofaciais , Leucoplasia Oral/terapia , Inquéritos e Questionários
8.
bioRxiv ; 2023 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-36712012

RESUMO

Implanted microelectrode arrays hold immense therapeutic potential for many neurodegenerative diseases. However, a foreign body response limits long-term device performance. Recent literature supports the role of astrocytes in the response to damage to the central nervous system (CNS) and suggests that reactive astrocytes exist on a spectrum of phenotypes, from beneficial to neurotoxic. The goal of our study was to gain insight into the subtypes of reactive astrocytes responding to electrodes implanted in the brain. In this study, we tested the transcriptomic profile of two reactive astrocyte culture models (cytokine cocktail or lipopolysaccharide, LPS) utilizing RNA sequencing, which we then compared to differential gene expression surrounding devices inserted into rat motor cortex via spatial transcriptomics. We interpreted changes in the genetic expression of the culture models to that of 24 hour, 1 week and 6 week rat tissue samples at multiple distances radiating from the injury site. We found overlapping expression of up to ∼250 genes between in vitro models and in vivo effects, depending on duration of implantation. Cytokine-induced cells shared more genes in common with chronically implanted tissue (≥1 week) in comparison to LPS-exposed cells. We revealed localized expression of a subset of these intersecting genes (e.g., Serping1, Chi3l1, and Cyp7b1) in regions of device-encapsulating, glial fibrillary acidic protein (GFAP)-expressing astrocytes identified with immunohistochemistry. We applied a factorization approach to assess the strength of the relationship between reactivity markers and the spatial distribution of GFAP-expressing astrocytes in vivo . We also provide lists of hundreds of differentially expressed genes between reactive culture models and untreated controls, and we observed 311 shared genes between the cytokine induced model and the LPS-reaction induced control model. Our results show that comparisons of reactive astrocyte culture models with spatial transcriptomics data can reveal new biomarkers of the foreign body response to implantable neurotechnology. These comparisons also provide a strategy to assess the development of in vitro models of the tissue response to implanted electrodes.

9.
JAMA Otolaryngol Head Neck Surg ; 149(10): 899-903, 2023 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-37615974

RESUMO

Importance: In addition to their patient management value, multidisciplinary tumor boards have been recognized as effective learning tools. However, the value of using a virtual tumor board as a learning tool for head and neck surgical oncology fellows has not been studied. Objective: To describe the structure and content of the American Head and Neck Society (AHNS) Virtual Tumor Board and assess its educational value as perceived by attendees. Design, Setting, and Participants: All sessions of the AHNS Virtual Tumor Board from April 8, 2020, to June 1, 2022, were reviewed. Topics, presenters, participants, and viewership data were collected as of October 15, 2022, from session recordings posted to an online video sharing and social media platform. Additionally, an anonymous, 14-question online survey was designed to elicit feedback from head and neck surgery trainees on virtual tumor board engagement, strengths, and weaknesses. The survey was electronically distributed in June and July 2022 to the 101 fellows enrolled in AHNS-accredited programs between July 1, 2020, and June 30, 2022. Main Outcomes and Measures: The primary aim was to tabulate online viewership of the sessions. The secondary aim was to qualitatively assess the experience of head and neck trainees with the AHNS Virtual Tumor Board using a survey. Results: Forty-two sessions of the virtual tumor board were held between April 8, 2020, and June 1, 2022. Almost all sessions (41 [98%]) were case based. One hundred and sixteen cases were presented, representing 2 to 3 cases per session, by 75 unique faculty members. Each session was viewed a mean of 217 times (range, 64-2216 views). In the 2021 to 2022 academic year, a mean of 60 viewers (range, 30-92 viewers) attended each live session. In all, 29 survey responses were collected from 101 fellows in AHNS-accredited programs (29% response rate). Most respondents felt the format allowed for excellent teaching (18 of 26 respondents [69%]) and discussion (19 of 26 respondents [73%]). Most respondents (22 of 29 respondents [76%]) believed that practicing head and neck surgeons would benefit from the sessions. Conclusions and Relevance: This survey study found that the AHNS Virtual Tumor Board was well-attended and well-reviewed by head and neck surgical oncology trainees. The virtual tumor board format could be used as model of remote learning for other organizations.


Assuntos
Neoplasias , Oncologia Cirúrgica , Humanos , Inquéritos e Questionários
10.
Head Neck ; 44(5): 1136-1141, 2022 05.
Artigo em Inglês | MEDLINE | ID: mdl-35191115

RESUMO

BACKGROUND: The present study aims to assess the quality and availability of online information about fellowships accredited by the American Head & Neck Society (AHNS). METHODS: AHNS directory pages and institutional web sites of 50 AHNS-accredited fellowships were identified. Web pages were scored using 20 standardized criteria including general information, application information, alumni, surgical training, research, and quality-of-life. RESULTS: Median scores for AHNS directory pages and institutional web sites were 11 (range: 7-14) and 10 (4-15), respectively. Faculty listings, contact information, program location, number of positions, and breadth of surgical exposure were the most commonly listed criteria. Less common criteria included didactic schedule, protected academic time, previous research projects, year of accreditation, work-life balance, fellow selection criteria, interview information, and salary. CONCLUSIONS: The AHNS directory and institutional web sites are most comprehensive in general program information and details about surgical training. Information about the application process, work-life balance, and research opportunities were less common.


Assuntos
Bolsas de Estudo , Internato e Residência , Humanos , Estados Unidos
11.
Annu Int Conf IEEE Eng Med Biol Soc ; 2022: 3072-3076, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-36085767

RESUMO

The biological response to electrodes implanted in the brain has been a long-standing barrier to achieving a stable tissue device-interface. Understanding the mechanisms underlying this response could explain phenomena including recording instability and loss, shifting stimulation thresholds, off-target effects of neuromodulation, and stimulation-induced depression of neural excitability. Our prior work detected differential expression in hundreds of genes following device implantation. Here, we extend upon that work by providing new analyses using differential co-expression analysis, which identifies changes in the correlation structure between groups of genes detected at the interface in comparison to control tissues. We used an "eigengene" approach to identify hub genes associated with each module. Our work adds to a growing body of literature which applies new techniques in molecular biology and computational analysis to long-standing issues surrounding electrode integration with the brain.


Assuntos
Encéfalo , Biomarcadores , Eletrodos , RNA-Seq
12.
Head Neck ; 44(7): 1665-1677, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35488469

RESUMO

BACKGROUND: Cachexia is detrimental for patients with head and neck cancer (HNC). However, postoperative consequences of HNC cachexia remain unknown. METHODS: A 2014-2019 retrospective review was performed of adults undergoing aerodigestive HNC resection with free tissue reconstruction. Propensity score matching using inverse probability of treatment weighting (IPTW) of cachectic and control groups was employed to adjust for covariate imbalances followed by binary logistic regression on postoperative outcomes. RESULTS: Out of 252 total patients, 135 (53.6%) had cancer cachexia. The cohort was predominantly white (94.4%) males (65.1%) aged 61.5 ± 11.5 years with stage III-IV (84.1%) malignancy of the oral cavity (66.3%). After matching cohort pre- and intra-operative covariates using IPTW, cancer cachexia remained a strong, significant predictor of serious National Surgical Quality Improvement Program (NSQIP) complications (OR [95%CI] = 3.84 [1.80-8.21]) and major Clavien-Dindo complications (OR [95%CI] = 3.00 [1.18-7.60]). CONCLUSIONS: Cancer cachexia is associated with worse HNC free flap reconstruction outcomes.


Assuntos
Retalhos de Tecido Biológico , Neoplasias de Cabeça e Pescoço , Procedimentos de Cirurgia Plástica , Adulto , Caquexia/etiologia , Feminino , Retalhos de Tecido Biológico/efeitos adversos , Neoplasias de Cabeça e Pescoço/complicações , Neoplasias de Cabeça e Pescoço/cirurgia , Humanos , Masculino , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/cirurgia , Procedimentos de Cirurgia Plástica/efeitos adversos , Estudos Retrospectivos
13.
Head Neck ; 44(11): 2537-2544, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-35942943

RESUMO

BACKGROUND: The recent trends in education and geographic distribution of the head and neck surgery workforce have not been studied extensively. METHODS: We reviewed publicly available sources to locate all fellowship-trained head and neck surgeons and recent graduates. The number of surgeons in each state was compared against head and neck cancer incidence data from the Centers for Disease Control. RESULTS: The number of graduates increased annually by 1 per 100 000 000 people from 2011-2020. The average number of fellowship-trained surgeons per state was 10 (SD: 12). The average number of new head and neck cancer cases per surgeon was 247 (SD: 135). Ten states (20%) had cases >1 SD above the national average/surgeon, while 3 (6%) had cases >1 SD below the national average. CONCLUSION: Head and neck surgeons are located in most states, but not uniformly. Most states have approximately average density of surgeons; however, several states are outliers.


Assuntos
Neoplasias de Cabeça e Pescoço , Oncologia Cirúrgica , Cabeça , Neoplasias de Cabeça e Pescoço/epidemiologia , Neoplasias de Cabeça e Pescoço/cirurgia , Humanos , Pescoço , Estados Unidos , Recursos Humanos
14.
JAMA Otolaryngol Head Neck Surg ; 148(6): 547-554, 2022 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-35476816

RESUMO

Importance: Surgical site infections (SSIs) after vascularized reconstruction of the upper aerodigestive tract (UADT) are associated with considerable morbidity. The association between perioperative prophylaxis practices, particularly topical antisepsis, and SSIs remains uncertain. Objective: To assess the association between perioperative topical antisepsis and SSIs in patients undergoing vascularized reconstruction of the UADT. Design, Setting, and Participants: This cohort study included patients from 12 academic tertiary care centers over an 11-month period, from July 1, 2020, to June 1, 2021. Patients undergoing open surgical procedures requiring a communication between the UADT and cervical skin with a planned regional pedicled flap, free flap, or both were included. Patients with an active infection at the time of surgical procedure were excluded. Main Outcomes and Measures: The primary outcome measure was an SSI within 30 days of surgery. The association of demographic characteristics, perioperative antibiotic prophylaxis, surgical technique, and postoperative care with SSIs was assessed using univariable and multivariable analyses. The relative risk ratio and 95% CIs for developing SSI were calculated for each of the variables based on predetermined categories. Variables for which the relative risk 95% CI did not include the value of zero effect (relative risk = 1.00) were included in the multivariable model. Results: A total of 554 patients (median age, 64 years; range, 21-95 years; 367 men [66.2%]) were included. Cancer ablation was the most frequent reason for surgery (n = 480 [86.6%]). Overall, the SSI rate was 20.9% (n = 116), with most infections involving the head and neck surgical site only (91 [78.4%]). The median time to SSI diagnosis was 11 days (range, 1-28 days). Topical antisepsis mucosal preparation was performed preoperatively in 35.2% (195) and postoperatively in 52.2% (289) of cases. Ampicillin and sulbactam was the most common systemic antibiotic prophylaxis agent used (n = 367 [66.2%]), with 24 hours being the most common duration (n = 363 [65.5%]). On multivariable analysis, preoperative topical antisepsis mucosal preparation (odds ratio [OR], 0.49; 95% CI, 0.30-0.77) and systemic prophylaxis with piperacillin and tazobactam (OR, 0.42; 95% CI, 0.21-0.84) were associated with a decreased risk of a postoperative SSI. The use of an osseous vascularized flap was associated with an increased risk of postoperative SSI (OR, 1.76; 95% CI, 1.13-2.75). Conclusions and Relevance: Findings of this study suggest that preoperative topical antisepsis mucosal preparation was independently associated with a decreased risk of SSIs in a 12-center multi-institutional cohort. Further investigation of the association between individual perioperative practices and the incidence of postoperative SSIs is necessary to develop evidence-based protocols to reduce SSIs after UADT reconstruction.


Assuntos
Retalhos de Tecido Biológico , Infecção da Ferida Cirúrgica , Antibioticoprofilaxia , Antissepsia , Estudos de Coortes , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Infecção da Ferida Cirúrgica/epidemiologia , Infecção da Ferida Cirúrgica/etiologia , Infecção da Ferida Cirúrgica/prevenção & controle
15.
Phys Rev Lett ; 106(20): 206404, 2011 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-21668248

RESUMO

We propose a mechanism for optical trapping of dark excitons by linearly polarized unabsorbed standing waves, with a potential depth of the order of a few meV. Since this trapping, based on carrier exchanges with virtual excitons coupled to unabsorbed photons, equally acts on bright and dark states, Bose-Einstein condensation of excitons--which occurs in dark states--must appear as dark spots in a cloud of bright excitons, at the trap potential minima, when the temperature decreases.

16.
Laryngoscope ; 131(7): 1528-1534, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33421136

RESUMO

OBJECTIVE/HYPOTHESIS: Testicular cancer is the most common malignancy of young males. Limited reports describe perioperative and long-term outcomes after surgical resection of metastatic, cervical, non-seminomatous germ cell tumors (NSGCT). The objective of this study was to investigate the effectiveness and safety of cervical lymphadenectomy in the management of metastatic NSGCT. STUDY DESIGN: Retrospective case series. METHODS: A single institution, retrospective review from 1998 to 2020 of patients with metastatic NSGCT who underwent cervical lymphadenectomy was conducted. Clinicopathological, surgical, and postoperative data were collected and analyzed. RESULTS: Sixty-eight predominantly white (91.0%) male patients with mean age 33.0 ± 11.3 years were included. Most (82.2%) presented with stage III disease at initial diagnosis. All patients had undergone primary platinum-based chemotherapy 1.0 to 22.7 months prior to selective ND. Surgery mainly involved nodal levels III (67.6%), IV (92.6%) and/or Vb (77.9%) and was frequently performed with concomitant thoracoabdominal NSGCT resections (63.2%). Cervical specimens predominantly revealed mature teratoma (83.8%) as solitary (69.1%) or component of mixed (14.7%) NSGCT. Ten (14.7%) perioperative complications occurred as vocal cord paresis (n = 6) from thoracic surgery and chyle leakage (n = 4). All resolved conservatively except two vocal cord paralyzes that required surgical repair due to tumor involvement of vagus nerve. Six instances of cervical recurrence occurred at median 12.5 (range, 5.8-38.6) months from ND, all re-demonstrating purely mature teratoma. The two-year cervical, non-cervical, and overall recurrence-free survivals were 83%, 55%, and 55%, respectively. Two-year disease-free and overall survivals were both 93%. CONCLUSIONS: Selective neck dissection is a safe, effective method for managing cervical NSGCT metastases. LEVEL OF EVIDENCE: 4 Laryngoscope, 131:1528-1534, 2021.


Assuntos
Metástase Linfática/terapia , Esvaziamento Cervical , Recidiva Local de Neoplasia/epidemiologia , Neoplasias Embrionárias de Células Germinativas/terapia , Teratoma/terapia , Neoplasias Testiculares/terapia , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Quimioterapia Adjuvante/métodos , Intervalo Livre de Doença , Humanos , Excisão de Linfonodo , Linfonodos/patologia , Linfonodos/cirurgia , Masculino , Terapia Neoadjuvante/métodos , Recidiva Local de Neoplasia/prevenção & controle , Estadiamento de Neoplasias , Neoplasias Embrionárias de Células Germinativas/mortalidade , Neoplasias Embrionárias de Células Germinativas/patologia , Orquiectomia , Estudos Retrospectivos , Teratoma/mortalidade , Teratoma/secundário , Neoplasias Testiculares/mortalidade , Neoplasias Testiculares/patologia , Testículo/patologia , Testículo/cirurgia , Adulto Jovem
17.
Otolaryngol Head Neck Surg ; 164(1): 27-36, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-32571148

RESUMO

OBJECTIVE: Parotid neoplasms are a rare heterogeneous group of tumors with varied clinical presentation and behavior. Here we provide an evidence-based review of the contemporary approach to evaluation and surgical management of parotid tumors. DATA SOURCE: PubMed and Web of Science Databases. REVIEW METHODS: Searches of the PubMed and Web of Science databases were performed on subjects related to the diagnosis and surgical management of parotid neoplasms. Particular emphasis was placed on the following areas: evaluation of parotid tumors, including imaging workup and the utility of fine-needle aspiration; extent of surgery of the primary lesion, including the extent of parotidectomy as well as oncologic management of the facial nerve; the extent of surgery of involved and at-risk cervical lymphatics; and parotid bed reconstruction. Articles published from 2014 to the present were prioritized, supplementing with information from prior studies in areas where data are lacking. CONCLUSION: A summary of the literature in these areas is outlined to provide an evidence-based approach to evaluation and management of parotid neoplasms. IMPLICATIONS FOR PRACTICE: While data are available to help guide many aspects of workup and management of parotid neoplasms, further research is needed to refine protocols for this heterogeneous group of diseases.


Assuntos
Neoplasias Parotídeas/diagnóstico , Neoplasias Parotídeas/cirurgia , Biópsia por Agulha Fina , Diagnóstico Diferencial , Diagnóstico por Imagem , Nervo Facial/cirurgia , Paralisia Facial/prevenção & controle , Humanos , Esvaziamento Cervical , Neoplasias Parotídeas/patologia , Complicações Pós-Operatórias , Procedimentos de Cirurgia Plástica
18.
OTO Open ; 5(3): 2473974X211047794, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34616997

RESUMO

OBJECTIVE: To evaluate the concerns and needs of patients and survivors of head and neck cancer (HNC) in the COVID-19 era. STUDY DESIGN: Prospective cross-sectional survey. SETTING: Contact lists of 5 North American HNC advocacy groups. METHODS: A 14-question survey was distributed to the contact lists of 5 HNC advocacy groups evaluating patient and survivor needs and concerns related to their cancer care and COVID-19. RESULTS: There were 171 respondents, with 75% in the posttreatment period. The most common concern was contraction of COVID-19 (49%). More patients in active treatment preferred in-person visits than those in the early (≤5 years) and late (>5) survivorship period (72% vs 61% vs 40%, P < .001). A higher percentage of late survivors preferred virtual visits (38% vs 28%, P = .001). In total, 91 (53.2%) respondents sought emotional support outside of immediate family and friends. This included cancer support groups (36.2%), the medical team (29.7%), and other sources outside of these (34.1%), including faith-based organizations and online communities. A higher proportion of women than men (62% vs 41%, P = .001) were seeking emotional support outside of immediate family and friends. CONCLUSIONS: During the early stages of the COVID-19 pandemic, patients with HNC who were actively undergoing treatment had increased need for support resources and preferred in-person provider visits. Alternatively, a higher percentage of patients >5 years from treatment preferred virtual visits. Emotional support outside of family and friends was sought out by a majority of respondents. Further research is needed to determine what support and educational resources are needed to best aid these various populations.

19.
Laryngoscope Investig Otolaryngol ; 6(2): 200-210, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33869752

RESUMO

OBJECTIVE: To determine if sarcopenia is a predictor of blood transfusion requirements in head and neck cancer free flap reconstruction (HNCFFR). METHODS: A single-institution, retrospective review was performed of HNCFFR patients with preoperative abdominal imaging from 2014 to 2019. Demographics, comorbidities (modified Charlson Comorbidity Index [mCCI]), skeletal muscle index (cm2/m2), oncologic history, intraoperative data, and 30-day postoperative complications (Clavien-Dindo score [CD]) were collected. Binary logistic regression was performed to determine predictors of transfusion. RESULTS: Eighty (33.5%), 66 (27.6%), and 110 (46.0%) of n = 239 total patients received an intraoperative, postoperative, or any perioperative blood transfusion, respectively. Sixty-two (25.9%) patients had sarcopenia. Patients receiving intraoperative transfusions had older age (P = .035), more frequent alcoholism (P = .028) and sarcopenia (P < .001), greater mCCI (P < .001), lower preoperative hemoglobin (P < .001), reconstruction with flaps other than forearm (P = .003), and greater operative times (P = .001), intravenous fluids (P < .001), and estimated blood loss (EBL, P < .001). Postoperative transfusions were associated with major complications (CD ≥ 3; P < .001). Multivariate regression determined sarcopenia (P = .023), mCCI (P = .013), preoperative hemoglobin (P = .002), operative time (P = .036), and EBL (P < .001) as independent predictors of intraoperative transfusion requirements. Postoperative transfusions were predicted by preoperative hemoglobin (P = .007), osseous flap (P = .036), and CD ≥ 3 (P < .001). A perioperative transfusion was predicted by sarcopenia (P = .021), preoperative hemoglobin (P < .001), operative time (P = .008), and CD ≥ 3 (P = .018). CONCLUSION: Sarcopenia is associated with increased blood transfusions in HNCFFR. Patients should be counseled preoperatively on the associated risks, and the increased blood product requirement should be accounted in resource-limited scenarios. LEVEL OF EVIDENCE: 4.

20.
Otolaryngol Head Neck Surg ; 165(1): 59-68, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33290190

RESUMO

OBJECTIVE: To determine the role of skeletal muscle index (SMI) in the assessment of frailty and determination of discharge to post-acute care facilities (PACF) after head and neck cancer free flap reconstruction (HNCFFR). STUDY DESIGN: Retrospective cohort. SETTING: Single-institution, academic tertiary referral center. METHODS: Adult patients undergoing HNCFFR from 2014 to 2019 with preoperative abdominal computed tomography imaging were retrospectively analyzed. Patient demographics, 5-factor modified frailty index (5-mFI), body mass index (BMI), SMI at the third lumbar vertebra, oncologic history, perioperative data, and Clavien-Dindo (CD) complications were collected. Binary logistic regression was used to identify independent predictors of discharge disposition. RESULTS: The cohort consisted of 206 patients, 62 (30.1%) of whom were discharged to PACF. Patients discharged to PACF were of older age (65.4 vs 57.1 years, P < .0001) and had a lower SMI (38.8 vs 46.8 cm2/m2, P < .0001), higher 5-mFI (≥3; 25.8% vs 4.2%, P < .0001), and greater incidence of stage IV (80.6% vs 64.1%, P = .0211) aerodigestive cancer (80.6% vs 66.7%, P = .0462). Patients discharged to PACF experienced more blood transfusions (74.2% vs 35.4%, P < .0001), major postoperative complications (CD ≥3, 40.3% vs 12.9%, P < .0001), and delirium (33.9% vs 4.2%, P < .0001). After adjusting for pre- and postoperative factors, multivariate binary logistic regression identified age (P = .0255), 5-mFI (P < .0042), SMI (P = .0199), stage IV cancer (P = .0250), aerodigestive tumor (P = .0366), delirium (P < .0001), and perioperative blood transfusion (P = .0144) as independent predictors of discharge to PACF. CONCLUSIONS: SMI and 5-mFI are independently associated with discharge to PACF after HNCFFR and should be considered in preoperative planning and assessment of frailty.


Assuntos
Fragilidade/complicações , Neoplasias de Cabeça e Pescoço/cirurgia , Músculo Esquelético , Alta do Paciente , Procedimentos de Cirurgia Plástica/efeitos adversos , Complicações Pós-Operatórias/epidemiologia , Adulto , Idoso , Índice de Massa Corporal , Feminino , Neoplasias de Cabeça e Pescoço/complicações , Neoplasias de Cabeça e Pescoço/patologia , Nível de Saúde , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Estudos Retrospectivos , Fatores de Risco
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA