RESUMO
Patient-reported outcome measures (PROM) are collected pre- and post-operatively following cosmetic surgery. Clinicians assess their own outcomes following surgery, but without a validated clinician-reported outcome measure (CROM), there is no way to compare the clinical results among clinicians or compare these to PROM. Assessment of clinical outcomes is important to address the patients' expectations in the consenting process and to provide recommendations to patients preoperatively to improve post-operative appearance. To address the lack of validated CROM for cosmetic surgery, the Manchester Cosmetic Clinical Reported Outcome Questionnaire (MCCRO-Q) was developed. This study assessed the inter-rater reliability of assessors using the four-point scale pre- and post-operative MCCRO-Q questionnaires. Fifteen assessors reviewed photos from pre- and post-operative assessments in the UK between July 2016 and February 2020. Ninety-five patients were included in this validation study, with each patient assessed by a minimum of 3 assessors. MCCRO-Q showed consistency between reviewers, with all intra-class coefficient averages >0.5 for pre- and post-operative assessments. Moreover, 26% of preoperative assessments demonstrated perfect agreement, 56% had a maximum one-point difference and 18% had a two-point difference to the median score. Furthermore, 1% of postoperative assessments demonstrated perfect agreement, 36% had a one-point difference and 63% had a maximum point difference of 2 to the median score. The inter-rate agreement showed that MCCRO-Q is a reliable tool when used with 3 or more assessors to judge patient appearance clinically, preoperatively and post-operatively, concerning abdominoplasty.
Assuntos
Medidas de Resultados Relatados pelo Paciente , Humanos , Reprodutibilidade dos Testes , Feminino , Inquéritos e Questionários , Adulto , Masculino , Pessoa de Meia-Idade , Satisfação do Paciente , Cirurgia Plástica , Reino UnidoRESUMO
The aim of this study was to establish if risk-reducing surgery (RRS) increases survival among BRCA1/2 carriers without breast/ovarian cancer at the time of family referral. Female BRCA1/2 carriers were identified from the Manchester Genetic Medicine Database. Those patients alive and unaffected at the date of first family ascertainment were included in this study. Female first-degree relatives (FDRs) without predictive genetic testing who otherwise met eligibility criteria were also included. The effect of breast and ovarian RRS on survival was analysed. The survival experiences of RRS and non-RRS patients, stratified by BRCA status, were examined with Kaplan-Meier curves and contrasted using log-rank tests and Cox models. 691 female BRCA1/2 mutation carriers without breast or ovarian cancer at time of family ascertainment were identified; 346 BRCA1 and 345 BRCA2. 105 BRCA1 carriers and 122 BRCA2 carriers developed breast cancer during follow-up. The hazard of death was statistically significantly lower (P < 0.001) following RRS versus no RRS. 10-year survival for women having RRS was 98.9 % (92.4-99.8 %) among BRCA1 and 98.0 % (92.2-99.5 %) among BRCA2 carriers. This survival benefit with RRS remained significant after FDRs were added. Women who had any form of RRS had increased survival compared to those who did not have RRS; a further increase in survival was seen among women who had both types of surgery. However, formal evidence for a survival advantage from bilateral mastectomy alone requires further research.
Assuntos
Neoplasias da Mama/mortalidade , Neoplasias da Mama/cirurgia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/genética , Criança , Pré-Escolar , Feminino , Seguimentos , Genes BRCA1 , Genes BRCA2 , Heterozigoto , Humanos , Mastectomia , Pessoa de Meia-Idade , Mutação , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/mortalidade , Neoplasias Ovarianas/cirurgia , Modelos de Riscos Proporcionais , Adulto JovemRESUMO
BRCA1/2 mutation carriers with breast cancer are at high risk of contralateral disease. Such women often elect to have contralateral risk-reducing mastectomy (CRRM) to reduce the likelihood of recurrence. This study considers whether CRRM improves overall survival. 105 female BRCA1/2 mutation carriers with unilateral breast cancer who underwent CRRM were compared to controls (593 mutation carriers and 105 specifically matched) not undergoing CRRM and diagnosed between 1985 and 2010. Survival was assessed by proportional hazards models, and extended to a matched analysis using stratification by risk-reducing bilateral salpingo-oophorectomy (RRBSO), gene, grade and stage. Median time to CRRM was 1.1 years after the primary diagnosis (range 0.0-13.3). Median follow-up was 9.7 years in the CRRM group and 8.6 in the non-CRRM group. The 10-year overall survival was 89 % in women electing for CRRM (n = 105) compared to 71 % in the non-CRRM group (n = 593); p < 0.001. The survival advantage remained after matching for oophorectomy, gene, grade and stage: HR 0.37 (0.17-0.80, p = 0.008)-CRRM appeared to act independently of RRBSO. CRRM appears to confer a survival advantage. If this finding is confirmed in a larger series it should form part of the counselling procedure at diagnosis of the primary tumour. The indication for CRRM in women who have had RRBSO also requires further research.
Assuntos
Proteína BRCA1/genética , Proteína BRCA2/genética , Neoplasias da Mama/mortalidade , Neoplasias da Mama/cirurgia , Mastectomia/métodos , Adulto , Neoplasias da Mama/genética , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Mutação , Ovariectomia , Adulto JovemRESUMO
Liposuction plays an important role as a surgical treatment option for lipoedema. This article serves to critically review the evidence in the literature, as well as explain the differences between the lipoedema population compared with the aesthetic surgery population undergoing liposuction. It is not a comprehensive text on lipoedema management but serves to guide surgeons. This guidance was produced on behalf of the British Association of Aesthetic Plastic Surgeons (BAAPS) and the British Association of Plastic Reconstructive and Aesthetic Surgeons (BAPRAS) by the expert liposuction group. The guidance is based on the evidence available in the literature, along with a specialist expert opinion on liposuction for lipoedema, to provide plastic surgeons with a consensus recommendation for surgical treatment. The aim is to identify best practice to maximise the safety of patients. This article summarises current practices and safety considerations and outlines recommendations covering various aspects of patient care.
Assuntos
Lipectomia , Lipedema , Procedimentos de Cirurgia Plástica , Cirurgiões , Cirurgia Plástica , Humanos , Assistência ao PacienteRESUMO
INTRODUCTION: Reconstruction of complex head and neck cases involving bony and dural defects poses many issues. The primary aims of reconstruction are to provide a tight dural seal with good cranial support while also achieving a satisfactory cosmetic result. AIMS: This study describes the use of combined radial forearm cutaneous flap and radial forearm fascial flaps for reconstruction of complex skull defects where each component is used for a distinct reconstructive purpose. The benefits of this technique are illustrated in the cases of three patients requiring reconstruction following tumor resection. METHODS: The fascial component was used as a seal for dural defects. The cutaneous flap was then used to reconstruct the concomitant cutaneous defect. CONCLUSION: The combined use of the fascial and cutaneous components of the radial forearm flap, where each is used for a distinct reconstructive purpose, increased the reconstructive versatility of this commonly used flap. The fascial flap was a thin, pliable, and highly vascularized piece of tissue that was effectively used to provide a watertight seal for the dural defect. The simultaneous use of the cutaneous flap gave support to the bony defect while providing a good cosmetic result.
Assuntos
Carcinoma Adenoide Cístico/cirurgia , Carcinoma Basocelular/cirurgia , Carcinoma de Células Escamosas/cirurgia , Fasciotomia , Antebraço/cirurgia , Neoplasias de Cabeça e Pescoço/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Transplante de Pele/métodos , Retalhos Cirúrgicos/irrigação sanguínea , Idoso , Feminino , Humanos , Masculino , Tomografia Computadorizada por Raios X , Resultado do TratamentoRESUMO
Liposuction is one of the commonest surgical aesthetic procedures performed worldwide. Despite being perceived to be a technically simple procedure, poor patient selection, sub-optimal technical execution or sub-optimal perioperative management could lead to significant harm. This guidance was produced on behalf of the British Association of Aesthetic Plastic Surgeons (BAAPS) and British Association of Plastic Reconstructive and Aesthetic Surgeons (BAPRAS) by the expert liposuction group. The guidance is based on the evidence available in the literature along with specialist expert opinion in aesthetic liposuction to provide plastic surgeons with consensus recommendation. The aim is to identify best practice to maximise the safety of patients. This article summarises current practices and safety considerations and outlines recommendations covering various aspects of patient care.
Assuntos
Lipectomia , Cirurgiões , Cirurgia Plástica , Estética , Humanos , Lipectomia/métodos , Assistência ao PacienteRESUMO
BACKGROUND: Sentinel node biopsy (SNB) may represent an alternative to elective neck dissection for the staging of patients with early head and neck squamous cell carcinoma (HNSCC). To date, the technique has been successfully described in a number of small single-institution studies. This report describes the long-term follow-up of a large European multicenter trial evaluating the accuracy of the technique. METHODS: A total of 227 SNB procedures were carried out across 6 centers, of which 134 were performed in clinically T1/2 N0 patients. All patients underwent SNB with preoperative lymphoscintigraphy, intraoperative blue dye, and handheld gamma probe. Sentinel nodes were evaluated with hematoxylin and eosin (H&E) staining, step-serial sectioning (SSS), and immunohistochemistry (IHC). There were 79 patients who underwent SNB as the sole staging tool, while 55 patients underwent SNB-assisted elective neck dissection. RESULTS: Sentinel nodes were successfully identified in 125 of 134 patients (93%), with a lower success rate observed for floor-of-mouth tumors (FoM; 88% vs. 96%, P = 0.138). Also, 42 patients were upstaged (34%); of these, 10 patients harbored only micrometastatic disease. At a minimum follow-up of 5 years, the overall sensitivity of SNB was 91%. The sensitivity and negative predictive values (NPV) were lower for patients with FoM tumors compared with other sites (80% vs. 97% and 88% vs. 98%, respectively, P = 0.034). CONCLUSIONS: Sentinel node biopsy is a reliable and reproducible means of staging the clinically N0 neck for patients with cT1/T2 HNSCC. It can be used as the sole staging tool for the majority of these patients, but cannot currently be recommended for patients with tumors in the floor of the mouth.
Assuntos
Carcinoma de Células Escamosas/secundário , Neoplasias de Cabeça e Pescoço/patologia , Carcinoma de Células Escamosas/cirurgia , Europa (Continente) , Seguimentos , Neoplasias de Cabeça e Pescoço/cirurgia , Humanos , Técnicas Imunoenzimáticas , Metástase Linfática , Prognóstico , Sensibilidade e Especificidade , Biópsia de Linfonodo Sentinela , Taxa de SobrevidaRESUMO
We present a case of sudden death of a 7-year-old boy who at autopsy was found to have an undiagnosed glioblastoma. The boy was asymptomatic until 2 hours before death complaining of a headache and was later found unresponsive in bed. A medicolegal autopsy was notable for a large hemorrhagic mass of the right frontal lobe, which on analysis was diagnostic of a glioblastoma. We feel that this is a unique case for 2 main reasons; high-grade gliomas of the cerebral cortex are rare in the pediatric population, and it is unusual for a large neoplasm to remain asymptomatic until 2 hours prior to death.
Assuntos
Neoplasias Encefálicas/patologia , Morte Súbita/etiologia , Glioblastoma/patologia , Encéfalo/patologia , Hemorragia Cerebral/patologia , Criança , Patologia Legal , Cefaleia/etiologia , Humanos , MasculinoRESUMO
Involvement of the cervical lymph nodes is the most important prognostic factor for patients with oral/oropharyngeal squamous cell carcinoma (OSCC), and the decision whether to electively treat patients with clinically negative necks remains a controversial topic. Sentinel node biopsy (SNB) provides a minimally invasive method of determining the disease status of the cervical node basin, without the need for a formal neck dissection. This technique potentially improves the accuracy of histological nodal staging and avoids over-treating three-quarters of this patient population, minimizing associated morbidity. The technique has been validated for patients with OSCC, and larger-scale studies are in progress to determine its exact role in the management of this patient population. This article was designed to outline the current best practice guidelines for the provision of SNB in patients with early-stage OSCC, and to provide a framework for the currently evolving recommendations for its use. These guidelines were prepared by a multidisciplinary surgical/nuclear medicine/pathology expert panel under the joint auspices of the European Association of Nuclear Medicine (EANM) Oncology Committee and the Sentinel European Node Trial Committee.
Assuntos
Carcinoma de Células Escamosas/cirurgia , Linfonodos/diagnóstico por imagem , Linfonodos/patologia , Neoplasias Bucais/cirurgia , Neoplasias Orofaríngeas/cirurgia , Biópsia de Linfonodo Sentinela , Carcinoma de Células Escamosas/diagnóstico por imagem , Carcinoma de Células Escamosas/patologia , Humanos , Linfonodos/cirurgia , Neoplasias Bucais/diagnóstico por imagem , Neoplasias Bucais/patologia , Neoplasias Orofaríngeas/diagnóstico por imagem , Neoplasias Orofaríngeas/patologia , CintilografiaRESUMO
The appearance of lymph node metastases represents the most important adverse prognostic factor in head and neck squamous cell carcinoma. Therefore, accurate staging of the cervical nodes is crucial in these patients. The management of the clinically and radiologically negative neck in patients with early oral and oropharyngeal squamous cell carcinoma is still controversial, though most centers favor elective neck dissection for staging of the neck and removal of occult disease. As only approximately 30% of patients harbor occult disease in the neck, most of the patients have to undergo elective neck dissection with no benefit. The sentinel node biopsy concept has been adopted from the treatment of melanoma and breast cancer to early oral and oropharyngeal squamous cell carcinoma during the last decade with great success. Multiple validation studies in the context of elective neck dissections revealed sentinel node detection rates above 95% and negative predictive values for negative sentinel nodes of 95%. Sentinel node biopsy has proven its ability to select patients with occult lymphatic disease for elective neck dissection, and to spare the costs and morbidity to patients with negative necks. Many centers meanwhile have abandoned routine elective neck dissection and entered in observational trials. These trials so far were able to confirm the high accuracy of the validation trials with less than 5% of the patients with negative sentinel nodes developing lymph node metastases during observation. In conclusion, sentinel node biopsy for early oral and oropharyngeal squamous cell carcinoma can be considered as safe and accurate, with success rates in controlling the neck comparable to elective neck dissection. This concept has the potential to become the new standard of care in the near future.
Assuntos
Metástase Linfática/patologia , Neoplasias Bucais/patologia , Esvaziamento Cervical/métodos , Neoplasias Orofaríngeas/patologia , Biópsia de Linfonodo Sentinela , Humanos , Metástase Linfática/diagnóstico por imagem , Neoplasias Bucais/diagnóstico por imagem , Estadiamento de Neoplasias , Neoplasias Orofaríngeas/diagnóstico por imagem , Tomografia Computadorizada de Emissão de Fóton Único , Tomografia Computadorizada por Raios XRESUMO
PURPOSE: The aim of this study was to determine whether tumor depth affects upstaging of the clinically node-negative neck, as determined by sentinel lymph node biopsy with full pathologic evaluation of harvested nodes including step-serial sectioning (SSS) and immunohistochemistry (IHC). PATIENTS AND METHODS: One hundred seventy-two patients with cT1/2 N0 squamous cell carcinoma (SCC) of the oral cavity/oropharynx undergoing primary resection and either sentinel node biopsy (SNB) or SNB-assisted neck dissection as a staging tool for the cN0 neck. Harvested nodes were examined with hematoxylin-eosin staining, SSS, and IHC. Patients upstaged by SSS/IHC were denoted pN1mi. RESULTS: One hundred one of 172 patients were staged pN0, with 71 (41%) patients upstaged. Increasing tumor depth was associated with higher likelihood of upstaging (P < .001). Tumor depth showed a positive correlation with nodal stage according to TNM classification (P < .001). Tumor depth greater than 4 mm appears to be the most appropriate cutoff for risk stratification, although tumors in the oropharynx may require a lower value. CONCLUSION: Tumor depth is an important prognostic factor for patients with SCC of the oral cavity or oropharynx. Tumors greater than 4 mm are associated with greater risk of upstaging; however, this optimum cutoff value may vary between primary tumor sites.
Assuntos
Carcinoma de Células Escamosas/patologia , Linfonodos/patologia , Neoplasias Bucais/patologia , Neoplasias Orofaríngeas/patologia , Corantes , Humanos , Imuno-Histoquímica , Metástase Linfática/patologia , Microtomia , Soalho Bucal/patologia , Esvaziamento Cervical , Invasividade Neoplásica , Estadiamento de Neoplasias , Prognóstico , Sensibilidade e Especificidade , Biópsia de Linfonodo Sentinela , Neoplasias da Língua/patologiaRESUMO
It has been postulated that venous thrombosis in free flap surgery necessitates the use of 2 venous anastomoses into different venous systems. We retrospectively analyzed a single surgeon's 10-year experience (August 1993 to August 2003) in primary free flap reconstruction for malignant tumors of the head and neck. Of 492 primary reconstructions that did not need a vein graft, vein loop, or cephalic turnover procedure, 251 used the internal jugular venous system as venous outflow, 140 used the subclavian system as outflow, and 101 used both. Two hundred thirty-eight of 251 (95%) of flaps utilizing the internal jugular venous system for outflow were successful compared with 129 of 140 (92%) of flaps utilizing the subclavian system. Where both venous systems were used the success rate was 101 of 101 (100%) (P < 0.05). Where possible, a second venous anastomosis should be performed utilizing both venous drainage systems.
Assuntos
Veias Jugulares/cirurgia , Esvaziamento Cervical/métodos , Pescoço/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Veia Subclávia/cirurgia , Retalhos Cirúrgicos/irrigação sanguínea , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Anastomose Cirúrgica/métodos , Feminino , Humanos , Masculino , Microcirurgia/métodos , Pessoa de Meia-Idade , Estudos Retrospectivos , Resultado do TratamentoRESUMO
There are an increasing number of our patients on antiplatelet and anticoagulant medications. In the absence of clear guidelines for the perioperative management of these patients presenting for operative dermatological procedures, we undertook a pilot survey of the current practices of dermatologists in the United Kingdom. The aims of our study were to determine whether there was uniformity of practice and whether the modes of practice differed from those outlined in the literature for other related specialities, and to debate whether there is a need for national guidelines with this regard. A postal survey of 185 dermatologists was conducted. The response rate was 50%. Overall, most respondents (61%) stated that their practice was primarily based on personal preference and only 30% stated that it was based on the local Unit policy. Only 34% of the Consultants based their practice on evidence-based medicine. There appeared to be significant variations in current practice amongst dermatologists. Some aspects of practice were found to vary from those recommended in the literature. The findings of this study emphasise the importance of national guidelines for the use of anti-platelet and anti-coagulant medications in cutaneous surgery specifically and in surgery in general.
Assuntos
Anticoagulantes/uso terapêutico , Inibidores da Agregação Plaquetária/uso terapêutico , Padrões de Prática Médica , Dermatopatias/cirurgia , Humanos , Cuidados Pré-Operatórios , Fatores de Risco , Dermatopatias/complicações , Inquéritos e Questionários , Reino UnidoRESUMO
OBJECTIVE: This study was undertaken to study the statistical correlation between lecithin/sphingomylein (L/S) ratio, percent phosphatidylglycerol (%PG), lamellar body count (LBC), and surfactant-to-albumin ratio (TDx-FLM(II)) in amniotic fluid (AF); and derive gestational age-specific (GA) predicted risk of neonatal respiratory distress syndrome (RDS) for LBC and TDx-FLM(II). STUDY DESIGN: AF specimens (238) were collected by transabdominal amniocentesis. L/S ratio, %PG, LBC, and TDx-FLM(II) were determined by established procedures. RDS diagnosis was ascertained by a neonatalogist, and statistical analyses were performed with the use of the SPSS software program (SPSS Inc, Chicago, Ill). RESULTS: Significant correlation was obtained among the 4 variables (L/S ratio, %PG, LBC, and TDx-FLM(II)). Independent linear regression analyses between L/S ratio versus LBC and TDx-FLM(II) provided acceptable correlation. Multiple regression analysis showed a significant (P < .001) contribution from TDx-FLM(II) and GA for predicting the L/S ratio. Receiver operating characteristic curve analysis provided the immature cutoffs (LBC = < 30.0 x 10(3)/microL; TDx-FLM(II) = < 40.0 mg/g). Total accuracy (either positive or negative) for RDS was similar for LBC (75.5%) and TDx-FLM(II) (76.7%). CONCLUSION: LBC and TDx-FLM(II) are equally accurate. GA-specific predicted risk of RDS by both tests significantly eliminated L/S ratio identified false positive cases of fetal lung maturity.
Assuntos
Albuminas/análise , Líquido Amniótico/química , Surfactantes Pulmonares/análise , Síndrome do Desconforto Respiratório do Recém-Nascido/epidemiologia , Adolescente , Adulto , Maturidade dos Órgãos Fetais , Idade Gestacional , Humanos , Recém-Nascido , Pulmão/embriologia , Pessoa de Meia-Idade , Síndrome do Desconforto Respiratório do Recém-Nascido/diagnóstico , Fatores de RiscoRESUMO
BACKGROUND: The use of one stage mastopexy augmentation in the ptotic patient remains controversial. Expansion of breast volume and reduction of the skin envelope contradict each other and increase the risks of potential complications. By carefully selecting and consenting patients appropriately I describe the use of the superiorly based dermal flap for autologous reinforcement of the inferior pole to increase safety and reliability in one stage mastopexy augmentation. OBJECTIVES: To determine whether the superiorly based dermal flap could provide a safe and reliable method of one stage mastopexy augmentation. METHODS: 40 one staged mastopexy augmentation procedures were performed on 21 patients. Patients were excluded if they smoked, BMI >30, had significant co-morbidities, had unrealistic expectations, required a nipple lift of >8 cm, wanted >400cc volume in primary cases or >25% increase in volume in secondary mastopexy augmentation. Both round and anatomical implants were used in either the sub glandular or dual plane pocket depending on patient's aesthetic wishes. RESULTS: The average implant size was 290cc and average nipple lift was 5 cm. After an average follow up of 27months there have been no implant based complications, no reoperations and no infections/haematomas/seromas. CONCLUSIONS: Careful selection and consent of patients make the use of the superiorly based dermal flap for autologous reinforcement of the inferior pole a safe reliable technique in one stage mastopexy augmentation.
Assuntos
Implantes de Mama , Estética , Mamoplastia/métodos , Transplante de Pele/métodos , Retalhos Cirúrgicos/transplante , Adulto , Idoso , Estudos de Coortes , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Seleção de Pacientes , Complicações Pós-Operatórias/fisiopatologia , Estudos Retrospectivos , Medição de Risco , Transplante Autólogo , Resultado do Tratamento , Cicatrização/fisiologia , Adulto JovemRESUMO
INTRODUCTION: A wide variety of terms are used to describe different extents of groin dissection for stage 3 melanoma which may result in confusion and reduce effectiveness of research. We aim to evaluate the published terminology. METHODS: A PubMed review was conducted using the terms 'melanoma' plus 'inguinal'; 'groin'; 'pelvic'; 'ilioinguinal' dissection. 63 papers were included from 1956 to March 2015. A review of anatomy and coding was also conducted. RESULTS: Inguinal dissection was described using 8 terms from 56 papers with 7 papers using multiple terms for the same procedure. 'Superficial dissection' was the most common term despite inguinal-nodal tissue being separated into superficial and deep layers anatomically. ICD10PCS and OPSC code for 'inguinal' with no anatomical definition, CPT codes for 'inguinofemoral/superficial'. Combination inguino-pelvic dissection was described using 11 terms from 51 papers with 15 papers using multiple terms for the same procedure. 'Ilioinguinal' and 'Deep' were the most common despite most pelvic dissections including obturator nodes. ICD10PCS and OPSC code for 'pelvic' with no anatomical definition and CPT codes for 'superficial plus pelvic'. CONCLUSION: Many different terms are used to describe the same procedures, often within the same article. The lack of clarity can confuse readers, hinder comparative research and jeopardise patient care. Imprecise documentation of anatomical definition limits surgical outcome reporting and can impede planning for revision surgery. Standardisation is necessary and groin dissection should be defined by anatomical boundaries e.g. 'superficial' and 'deep' inguinal; 'pelvic'; 'inguino-pelvic' with clear documentation of extent.
Assuntos
Dissecação , Virilha/cirurgia , Excisão de Linfonodo , Melanoma/secundário , Melanoma/cirurgia , Terminologia como Assunto , Humanos , Metástase Linfática , Neoplasias Cutâneas , Melanoma Maligno CutâneoRESUMO
Although the surface properties of surfactant protein (SP)-B and SP-C are similar, the contributions that either protein may make to lung function have not been identified in vivo. Mutations in SP-B cause lethal respiratory failure at birth; however, SP-B null mice are deficient in both SP-B and SP-C. To identify potential contributions of SP-C to lung function in vivo, the following transgenic mice were generated and exposed to 95% O(2) for 3 days: (SP-B(+/+),SP-C(+/+)), (SP-B(+/+), SP-C(-/-)), (SP-B(+/-),SP-C(+/+)), (SP-B(+/-),SP-C(+/-)), and (SP-B(+/-),SP-C(-/-)). Hyperoxia altered pressure-volume curves in mice that were heterozygous for SP-B, and these values were further decreased in (SP-B(+/-),SP-C(-/-)) mice. Likewise, alveolar interleukin (IL)-6 and IL-1 beta were maximally increased by O(2) exposure of (SP-B(+/-),SP-C(-/-)) mice compared with the other genotypes. Lung hysteresivity was lower in the (SP-B(+/-),SP-C(-/-)) mice. Surfactant isolated from (SP-B(+/+),SP-C(-/-)) and (SP-B(+/-),SP-C(-/-)) mice failed to stabilize the surface tension of microbubbles, showing that SP-C plays a role in stabilization or recruitment of phospholipid films at low bubble radius. Genetically decreased levels of SP-B combined with superimposed O(2)-induced injury reveals the distinct contribution of SP-C to pulmonary function in vivo.
Assuntos
Oxigênio , Pneumonia/induzido quimicamente , Pneumonia/fisiopatologia , Proteolipídeos/fisiologia , Surfactantes Pulmonares/deficiência , Surfactantes Pulmonares/fisiologia , Animais , Líquido da Lavagem Broncoalveolar/química , Citocinas/análise , Hiperóxia/fisiopatologia , Pulmão/fisiologia , Medidas de Volume Pulmonar , Camundongos , Camundongos Transgênicos , Fosfatidilcolinas/análise , Pressão , Proteínas/análise , Proteolipídeos/metabolismo , Alvéolos Pulmonares/metabolismo , Surfactantes Pulmonares/metabolismo , Mecânica Respiratória , Tensão SuperficialRESUMO
OBJECTIVE: To establish a link between tryptophan (a precursor for 5-hydroxytryptamine (5-HT) or serotonin, involved in sleep and fatigue) and post-operative fatigue after major surgery. BACKGROUND: There is a link between tryptophan (the precursor for the neurotransmitter 5-hydroxytryptamine), and its competitive binding with non-esterified fatty acids (NEFA) to albumin in the blood. An increase in the plasma concentration of free tryptophan can lead to an increased rate of synthesis of 5-HT in the brain. Free tryptophan competes with the branched chain amino acids (BCAA) for the same port of entry across the blood-brain barrier. It is suggested that the plasma concentration of these amino acids could be a marker of post-operative fatigue. In a previous study undertaken in this laboratory on patients undergoing two different types of major surgery, similar post-operative increases were observed in the plasma concentration of free tryptophan and the plasma concentration ratio of free tryptophan to branched chain amino acids. However, the study was retrospective and no measure of fatigue had been made. METHODS: In the present study, this deficiency has been addressed by administering a modified Profile of Mood States questionnaire to patients undergoing reconstructive or colorectal surgery. In addition, blood samples were measured for plasma free tryptophan, albumin, NEFA and branched chain amino acids before and on 2 days after surgery. RESULTS: There was a significant correlation between fatigue scores and plasma free tryptophan (P<0.000), and the plasma concentration ratio of free tryptophan/BCAA (P<0.016) after surgery in all the patients studied (n=34). This correlation was more marked in the colorectal-surgery patients, in whom surgery was more severe. In the three categories of patients receiving elective reconstructive surgery (n=24), those having breast reductions (n=6) had a lower plasma concentration of NEFA and appeared to recover from fatigue more quickly than those with pre-tibial lacerations or malignant melanoma. CONCLUSIONS: These data provide further evidence of a possible biochemical mechanism for central fatigue which involves a precursor of 5-HT. The provision of branched chain amino acids may help to combat the surge in free tryptophan that occurs during stress such as major surgery.
Assuntos
Fadiga/sangue , Complicações Pós-Operatórias/sangue , Triptofano/sangue , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Albuminas/metabolismo , Aminoácidos de Cadeia Ramificada/sangue , Cirurgia Colorretal/efeitos adversos , Cirurgia Colorretal/psicologia , Fadiga/etiologia , Fadiga/psicologia , Ácidos Graxos/sangue , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/psicologia , Procedimentos de Cirurgia Plástica/efeitos adversos , Procedimentos de Cirurgia Plástica/psicologia , Inquéritos e Questionários , Fatores de TempoRESUMO
OBJECTIVE: To investigate the possible role of sentinel node biopsy (SNB) alone to upstage the clinically N0 neck in patients with oral and oropharyngeal squamous cell carcinoma. DESIGN: Prospective clinical study. SETTING: Head and neck referral center. PATIENTS: Patients with primary untreated oral and/or oropharyngeal squamous cell carcinoma accessible to injection and with clinically N0 necks were enrolled in the study. INTERVENTION: An SNB was performed after radiocolloid and blue dye injection. Preoperative lymphoscintigraphy and the perioperative use of a gamma probe identified radioactive sentinel nodes and visualization of blue-stained lymphatics identified blue sentinel nodes. If the sentinel node was found negative, there was no further treatment to the neck. If the sentinel node tested positive, a therapeutic neck dissection was performed. All patients underwent regular follow-up at the outpatient clinic to identify possible recurrence. MAIN OUTCOME MEASURES: Upstaging of the clinically N0 neck by SNB and development of subsequent disease in SNB-negative necks. RESULTS: An SNB was performed on 57 clinically N0 necks in 48 patients. Sentinel nodes were harvested in 43 (90%) of 48 patients. Fifteen (35%) of 43 patients were upstaged by SNB and 28 (65%) of 43 were staged SNB negative. There was a mean follow-up of 18 months. One patient developed subsequent disease after having been staged negative with SNB. The overall sensitivity of the procedure using the full pathologic protocol was 94% (15/16). CONCLUSIONS: Sentinel node biopsy can be used to upstage the N0 neck in patients with early subclinical nodal disease. However, before it becomes the standard of care in head and neck squamous cell carcinoma, longer follow-up observational trials are needed.