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BACKGROUND & AIMS: Autoimmune pancreatitis (AIP) is an immune-mediated disease of the pancreas with distinct pathophysiology and manifestations. Our aims were to characterize type 1 AIP in a large pan-European cohort and study the effectiveness of current treatment regimens. METHODS: We retrospectively analyzed adults diagnosed since 2005 with type 1 or not-otherwise-specified AIP in 42 European university hospitals. Type 1 AIP was uniformly diagnosed using specific diagnostic criteria. Patients with type 2 AIP and those who had undergone pancreatic surgery were excluded. The primary end point was complete remission, defined as the absence of clinical symptoms and resolution of the index radiologic pancreatic abnormalities attributed to AIP. RESULTS: We included 735 individuals with AIP (69% male; median age, 57 years; 85% White). Steroid treatment was started in 634 patients, of whom 9 (1%) were lost to follow-up. The remaining 625 had a 79% (496/625) complete, 18% (111/625) partial, and 97% (607/625) cumulative remission rate, whereas 3% (18/625) did not achieve remission. No treatment was given in 95 patients, who had a 61% complete (58/95), 19% partial (18/95), and 80% cumulative (76/95) spontaneous remission rate. Higher (≥0.4 mg/kg/day) corticosteroid doses were no more effective than lower (<0.4 mg/kg/day) doses (odds ratio, 0.428; 95% confidence interval, 0.054-3.387) and neither was a starting dose duration >2 weeks (odds ratio, 0.908; 95% confidence interval, 0.818-1.009). Elevated IgG4 levels were independently associated with a decreased chance of complete remission (odds ratio, 0.639; 95% confidence interval, 0.427-0.955). Relapse occurred in 30% of patients. Relapses within 6 months of remission induction were independent of the steroid-tapering duration, induction treatment duration, and total cumulative dose. CONCLUSIONS: Patients with type 1 AIP and elevated IgG4 level may need closer monitoring. For remission induction, a starting dose of 0.4 mg/kg/day for 2 weeks followed by a short taper period seems effective. This study provides no evidence to support more aggressive regimens.
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Pancreatite Autoimune , Humanos , Masculino , Pessoa de Meia-Idade , Feminino , Estudos Retrospectivos , Pancreatite Autoimune/tratamento farmacológico , Pancreatite Autoimune/diagnóstico , Europa (Continente) , Idoso , Resultado do Tratamento , Adulto , Esteroides/uso terapêutico , Esteroides/administração & dosagem , Idoso de 80 Anos ou maisRESUMO
INTRODUCTION: Folliculitis is a painful infection and inflammation of the hair follicles, mostly caused by bacterial, fungal, or, more rarely, viral infections. Turpentine derivatives have been used traditionally to treat various skin infections and could thus also be effective in treating folliculitis. We carried out an open, prospective, randomized, placebo- and comparator-controlled multicenter trial to evaluate the efficacy and safety of an ointment containing pine turpentine oil, larch turpentine, and eucalyptus oil in the treatment of acute folliculitis. METHODS: Seventy outpatients with acute folliculitis were treated with the turpentine ointment, a comparator (povidone iodine solution), or a placebo (Vaseline) for 7 days. Photographs of the affected skin areas were taken by the physicians at four visits and by the patients on a daily basis. Photographs were evaluated by blinded observers. Primary efficacy endpoint was the change in total hair follicle lesion counts. Secondary endpoints included the evolution of the lesion counts in the course of the study, responder rate (improvement of follicle lesions by at least one count), and the patient's global assessment. Safety endpoints were the tolerability of the treatments and adverse event recording. RESULTS: A decrease of follicle lesions counts was detected for both active treatments but not for placebo, but the differences among groups were not statistically significant. As for the secondary endpoints, the ointment showed statistically significant superiority over placebo for the evolution of the lesions during the course of the study (p = 0.017), the responder rate (p = 0.032), and the subjective efficacy assessment by patients (p = 0.029). All treatments were equally well tolerated, with a similar number of treatment-emergent adverse events. CONCLUSION: The turpentine ointment is an effective and safe option for the treatment of folliculitis.
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Foliculite , Terebintina , Humanos , Pomadas , Estudos Prospectivos , Foliculite/tratamento farmacológico , Pele , Resultado do Tratamento , Método Duplo-CegoRESUMO
BACKGROUND: Non-resectability is common in patients with pancreatic ductal adenocarcinoma (PDAC) due to local invasion or distant metastases. Then, biliary or gastroenteric bypasses or both are often established despite associated morbidity and mortality. The current study explores outcomes after palliative bypass surgery in patients with non-resectable PDAC. METHODS: From the prospectively maintained German StuDoQ|Pancreas registry, all patients with histopathologically confirmed PDAC who underwent non-resective pancreatic surgery between 2013 and 2018 were retrospectively identified, and the influence of the surgical procedure on morbidity and mortality was analyzed. RESULTS: Of 389 included patients, 127 (32.6%) underwent explorative surgery only, and a biliary, gastroenteric or double bypass was established in 92 (23.7%), 65 (16.7%) and 105 (27.0%). After exploration only, patients had a significantly shorter stay in the intensive care unit (mean 0.5 days [SD 1.7] vs. 1.9 [3.6], 2.0 [2.8] or 2.1 [2.8]; P < 0.0001) and in the hospital (median 7 days [IQR 4-11] vs. 12 [10-18], 12 [8-19] or 12 [9-17]; P < 0.0001), and complications occurred less frequently (22/127 [17.3%] vs. 37/92 [40.2%], 29/65 [44.6%] or 48/105 [45.7%]; P < 0.0001). In multivariable logistic regression, biliary stents were associated with less major (Clavien-Dindo grade ≥ IIIa) complications (OR 0.49 [95% CI 0.25-0.96], P = 0.037), whereas-compared to exploration only-biliary, gastroenteric, and double bypass were associated with more major complications (OR 3.58 [1.48-8.64], P = 0.005; 3.50 [1.39-8.81], P = 0.008; 4.96 [2.15-11.43], P < 0.001). CONCLUSIONS: In patients with non-resectable PDAC, biliary, gastroenteric or double bypass surgery is associated with relevant morbidity and mortality. Although surgical palliation is indicated if interventional alternatives are inapplicable, or life expectancy is high, less invasive options should be considered.
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Carcinoma Ductal Pancreático , Neoplasias Pancreáticas , Humanos , Estudos Retrospectivos , Neoplasias Pancreáticas/patologia , Carcinoma Ductal Pancreático/cirurgia , Pâncreas/patologia , Cuidados Paliativos , Sistema de Registros , Neoplasias PancreáticasRESUMO
INTRODUCTION: Surgical resection improves survival in pancreatic ductal adenocarcinoma (PDAC) and adjuvant chemotherapy adds an additional survival-benefit. While surgical technique has improved in recent years, it remains unclear whether these improvements translate into a survival benefit independent of adjuvant chemotherapy. Thus, we aimed to clarify whether survival of patients who were treated with either Gemcitabine (GEM) or who were observed only in randomized controlled trials on adjuvant chemotherapy of PDAC improved over time. METHODS: A systematic search of MEDLINE/PubMed was performed to identify randomized controlled trials on adjuvant chemotherapy of PDAC. The search was limited to studies with arms on GEM monotherapy or postoperative observation and studies were grouped by the median year of enrolment and the use of GEM. Subsequently, a meta-regression on the effect of the median year of enrolment on patient survival was performed. RESULTS: A total of 13 studies with 2469 patients was included, with median years of enrollment ranging from 1996 to 2015. While disease-free survival decreased in patients with postoperative observation (18.0 vs. 5.0 months, p = 0.001), median survival improved over time in patients with postoperative observation (15.8 vs. 18.4 months, p = 0.01) and in patients treated with adjuvant GEM (22.8 vs. 35.0 months, p < 0.001). One- (p ≤ 0.01) and two-year survival (p = 0.056) improved in both patients treated with adjuvant GEM and those observed only. CONCLUSION: Survival after surgical resection of PDAC has improved since 1996, even in patients who did not receive adjuvant chemotherapy. Improved surgical technique and postoperative management are likely to be causative factors.
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Carcinoma Ductal Pancreático/cirurgia , Desoxicitidina/análogos & derivados , Neoplasias Pancreáticas/cirurgia , Viés , Carcinoma Ductal Pancreático/tratamento farmacológico , Carcinoma Ductal Pancreático/mortalidade , Quimioterapia Adjuvante , Desoxicitidina/uso terapêutico , Humanos , Neoplasias Pancreáticas/tratamento farmacológico , Neoplasias Pancreáticas/mortalidade , Análise de Regressão , GencitabinaRESUMO
In patients with pancreatic ductal adenocarcinoma (PDAC), the tumor microenvironment consists of cellular and stromal components that influence prognosis. Hence, tumor-infiltrating lymphocytes (TILs) may predict prognosis more precisely than conventional staging systems. Studies on the impact of TILs are heterogeneous and further research is needed. Therefore, this study aims to point out the importance of peritumoral TILs, tumor-infiltrating neutrophils (TINs), and immune subtype classification in PDAC. Material from 57 patients was analyzed with immunohistochemistry performed for CD3, CD8, CD20, CD66b, α-sma, and collagen. Hot spots with peritumoral TILs and TINs were quantified according to the QTiS algorithm and the distance of TILs hot spots to the tumor front was measured. Results were correlated with overall (OS) and progression-free survival (PFS). High densities of peritumoral hot spots with CD3âº, CD8âº, and CD20⺠TILs correlated significantly with improved OS and PFS. Combined immune cell subtypes predicted improved OS and PFS. High infiltration of CD3⺠TILs predicted progression after 12 months. The location of TILs' hot spots and their distance to the tumor front did not correlate with patient survival. Peritumoral TILs and the composition of the stroma predict OS and PFS in PDAC.
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In this review, results of randomized double-blind controlled clinical trials (RCTs) with extracts of Serenoa repens fruits at a dose of 320 mg/d for the treatment of lower urinary tract symptoms (LUTS) are assessed. Of the RTCs conducted for up to 6 months, a benefit was seen in three of three RTCs with ethanolic, in eight of nine RTCs with hexane, and in one of two RTCs with CO2 extracts. Of the RTCs conducted for more than 6 months, a benefit was seen in two RTCs with hexane and in one RTC with CO2 extracts, whereas one RTC with an ethanolic, two RTCs with hexane, and one RTC with CO2 extracts did not show positive results. As LUTS are dynamic conditions with strong spontaneous fluctuation over time, the majority of patients might expect improvement of single symptoms and thus of quality of life, particularly as the extracts are well tolerated even in long-term treatment.
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Sintomas do Trato Urinário Inferior/tratamento farmacológico , Fitoterapia/métodos , Extratos Vegetais/uso terapêutico , Serenoa , Relação Dose-Resposta a Droga , Método Duplo-Cego , Humanos , Assistência de Longa Duração , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do TratamentoRESUMO
The relative chronology of the Aegean Iron Age is robust. It is based on minute stylistic changes in the Submycenaean, Protogeometric and Geometric styles and their sub-phases. Yet, the absolute chronology of the time-span between the final stages of Late Helladic IIIC in the late second millennium BCE and the archaic colonization of Italy and Sicily toward the end of the 8(th) century BCE lacks archaeological contexts that can be directly related to events carrying absolute dates mentioned in Egyptian/Near Eastern historical sources, or to well-dated Egyptian/Near Eastern rulers. The small number of radiocarbon dates available for this time span is not sufficient to establish an absolute chronological sequence. Here we present a new set of short-lived radiocarbon dates from the sites of Lefkandi, Kalapodi and Corinth in Greece. We focus on the crucial transition from the Submycenaean to the Protogeometric periods. This transition is placed in the late 11(th) century BCE according to the Conventional Aegean Chronology and in the late 12(th) century BCE according to the High Aegean Chronology. Our results place it in the second half of the 11(th) century BCE.
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Artefatos , Datação Radiométrica , Arqueologia , Grécia , Região do Mediterrâneo , Fatores de TempoRESUMO
The leading cause of morbidity and mortality after successful resuscitation is hypoxic-ischemic encephalopathy (HIE), which results in neuronal loss within the neocortex and the hippocampal formation. This study focuses on the impact of HIE on adult neurogenesis in the human hippocampal dentate gyrus as a potential intrinsic regenerative mechanism in response to neuronal damage. Brain sections of 22 autopsy cases with HIE and of 19 age-matched controls without neuropathological abnormalities were investigated by means of immunohistochemistry. The densities of immature granule cells during axon guidance and outgrowth (assessed by TUC-4 immunohistochemistry) and of young calretinin-expressing postmitotic neurons were increased in the granule cell layer of cases who had suffered from HIE (P = 0.0002 and P = 0.0001, respectively). Similarly, the density of apoptotic granule cells, as detected by in situ tailing and morphological criteria, was increased in HIE (P = 0.014). In cases with HIE, the increase in the density of TUC-4-labeled cells inversely correlated with age (P = 0.027). In contrast, neither the density of proliferating nor that of apoptotic cells was substantially influenced by age within the control group. Taken together, both an increase in adult neurogenesis and in neuronal apoptosis was observed in the human dentate gyrus in response to HIE. The data suggest a decrease of adult neurogenesis in older-aged cases. Whether neurogenesis can contribute to recovery after HIE remains to be determined. The stimulation of adult neurogenesis may be less efficient in older victims of HIE.
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Apoptose , Proliferação de Células , Giro Denteado/fisiopatologia , Hipóxia-Isquemia Encefálica/fisiopatologia , Neurogênese , Neurônios/patologia , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Autopsia , Calbindina 2 , Estudos de Casos e Controles , Contagem de Células/métodos , Giro Denteado/patologia , Feminino , Humanos , Hipóxia-Isquemia Encefálica/patologia , Imuno-Histoquímica , Masculino , Pessoa de Meia-Idade , Proteínas Musculares/análise , Neurônios/química , Estudos Retrospectivos , Proteína G de Ligação ao Cálcio S100/análiseRESUMO
There has been significant work investigating the use of molecules as nanoscale rectifiers in so-called "molecular electronics". However, less attention has been paid to optimizing the design parameters of molecular rectifiers or to their inherent limitations. Here we use a barrier tunneling model to examine the degree of rectification that can be achieved and to provide insight for the design and development of molecules with optimum rectification responses.
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Desenho Assistido por Computador , Análise de Falha de Equipamento , Microeletrodos , Modelos Químicos , Nanoestruturas/química , Nanotecnologia/instrumentação , Semicondutores , Simulação por Computador , Condutividade Elétrica , Desenho de Equipamento , Nanoestruturas/ultraestrutura , Nanotecnologia/métodosRESUMO
The adsorption of benzene on the Cu(111), Ag(111), Au(111), and Cu(110) surfaces at low coverage is modeled using density-functional theory (DFT) using periodic-slab models of the surfaces as well as using both DFT and complete-active-space self-consistent field theory with second-order Møller-Plesset perturbation corrections (CASPT2) for the interaction of benzene with a Cu13 cluster model for the Cu(110) surface. For the binding to the (111) surfaces, key qualitative features of the results such as weak physisorption, the relative orientation of the adsorbate on the surface, and surface potential changes are in good agreement with experimental findings. Also, the binding to Cu(110) is predicted to be much stronger than that to Cu(111) and much weaker than that seen in previous calculations for Ni(110), as observed. However, a range of physisorptive-like and chemisorptive-like structures are found for benzene on Cu(110) that are roughly consistent with observed spectroscopic data, with these structures differing dramatically in geometry but trivially in energy. For all systems, the bonding is found to be purely dispersive in nature with minimal covalent character. As dispersive energies are reproduced very poorly by DFT, the calculated binding energies are found to dramatically underestimate the observed ones, while CASPT2 calculations indicate that there is no binding at the Hartree-Fock level and demonstrate that the expected intermolecular correlation (dispersive) energy is of the correct order to explain the experimental binding-energy data. DFT calculations performed for benzene on Cu(110) and for benzene on the model cluster indicate that this cluster is actually too reactive and provides a poor chemical model for the system.
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BACKGROUND: Involvement of the metacarpophalangeal (MP) joints is one of the major problems in patients with rheumatoid arthritis (RA). Although several data about the cumulative influence of steroid intake on bone are available, the course of demineralisation in RA has not been described by quantitative methods until now. PATIENTS AND METHODS: Computed tomography (CT) sections of 96 MP joints in 12 RA patients and of 32 MP joints in four age-matched healthy controls were investigated. Patients were classified according to Steinbrocker. Densitometric evaluation of subchondral bone density was performed by CT osteoabsorptiometry (CT-OAM). Quantitative CT-OAM was used to evaluate mineralisation of the articular surfaces in MP joints. RESULTS: In the distal articular surface of MP joints, the number of density maxima was reduced from 3 to 2.1+/-0.3, 1.9+/-0.5 and 1.3+/-0.3 in RA patients with early, mild to moderate, and severe disease, respectively. Means of calcium concentrations were 633.4+/-35. 3 mg Ca2+/mL, 518.9+/-56.2 mg Ca2+/mL, 497.7+/-23.8 mg Ca2+/mL and 455.1+/-28.6 mg Ca2+/mL for controls and RA patients with early, mild to moderate, and severe RA, respectively. Mineralisation of the distal articular surface was significantly reduced in all groups of RA patients [probability (p) = 0.005]. Regarding the number of density maxima, no differences were detected in the proximal articular surface of normal and RA fingers. However, mineralisation of the proximal articular surface was significantly reduced in all groups of RA patients (p = 0.004). Means of calcium concentrations of the proximal articular surface were 494.1+/-48.5 mg Ca2+/mL, 413.0+/-16.2 mg Ca2+/mL, 406.0+/-51.4 mg Ca2+/mL, 390,4+/-41.1 mg Ca2+/mL for controls and RA patients with early, mild to moderate, and severe RA, respectively. CONCLUSION: Patients with early and untreated RA show loss of mineralisation and altered morphology of the MP joints of the hand, even before corticosteroid therapy. CT-OAM provides evidence for an early alteration of functional anatomy in MP joints.
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Artrite Reumatoide/fisiopatologia , Doenças Ósseas Metabólicas/fisiopatologia , Cartilagem Articular/patologia , Adulto , Idoso , Artrite Reumatoide/patologia , Densidade Óssea , Doenças Ósseas Metabólicas/diagnóstico por imagem , Doenças Ósseas Metabólicas/patologia , Cálcio/sangue , Cartilagem Articular/diagnóstico por imagem , Feminino , Humanos , Pessoa de Meia-Idade , Valores de Referência , Tomografia Computadorizada por Raios XRESUMO
External assault to the skin is followed by an epidermal response including synthesis of DNA, lipids, cytokines and migration of antigen presenting cells. MIP-3 alpha (CCL20, LARC, Exodus-1, Scya20) is a recently described C-C chemokine, predominantly expressed in extralymphoid tissue, which is known to direct migration of dendritic cell precursors and memory lymphocytes to sites of antigen invasion. We assessed the expression of MIP-3 alpha in human skin using semi-quantitative polymerase chain reaction. In vivo, MIP-3 alpha mRNA was constitutively expressed at low levels in untreated human epidermis. After acute disruption of the epidermal permeability barrier MIP-3 alpha mRNA was upregulated in the epidermal fraction, whereas dermal MIP-3 alpha mRNA levels remained unchanged. In vitro, MIP-3 alpha was increased in cultured keratinocytes treated with IL-1 alpha and TNF-alpha and was present in immature and mature dendritic cells, THP-1 monocytic cells and activated T cells. Finally, skin biopsies from patients with psoriasis, contact dermatitis and mycosis fungoides showed abundant expression. In biopsies from atopic dermatitis and graft vs. host disease a weak signal was present, whereas no expression was found in scleroderma and toxic epidermal necrolysis. We conclude that regulation of MIP-3 alpha mRNA is part of the epidermal response to external assault. Its upregulation may represent a danger signal for increased immunosurveillance in barrier disrupted skin and inflammatory skin conditions with impaired barrier function to counteract potential antigen invasion.
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Quimiocinas CC/metabolismo , Epiderme/metabolismo , Proteínas Inflamatórias de Macrófagos/metabolismo , Receptores de Quimiocinas , Células Cultivadas , Quimiocina CCL20 , Quimiocinas CC/genética , Derme/metabolismo , Humanos , Proteínas Inflamatórias de Macrófagos/genética , Permeabilidade , RNA Mensageiro/metabolismo , Receptores CCR6 , Pele/metabolismo , Dermatopatias/metabolismo , Regulação para CimaRESUMO
Beside the loss of the memory capacity, non-cognitive disturbances occur up to 70%-90% in patients suffering from Alzheimer's disease due to pathological changes in the brain. Delusion, hallucination and changes of the circadian rhythm can appear in addition to the five kinds of disorder--agitation, aggressive behaviour, screaming, depression and constant hyperkinesia. The consequences of these changes in perception and behaviour constitute severe problems for the patient as well as for the main caregiver. The burden of caring often exceeds their energy and resources. Not only do many of those caregivers suffer themselves from exhaustion but also from feelings of guilt and depression. The therapeutic concept includes the involvement of the relatives through information, support, counselling and guidance as much as the investigation of the causes and interrelation of the problematic behaviour in each individual case and further involves the carer in creating a concept to deal in an optimal way with the patient.
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Adaptação Psicológica , Cuidadores/psicologia , Grupos de Autoajuda , Idoso , Terapia Comportamental , Efeitos Psicossociais da Doença , Humanos , Apoio SocialRESUMO
BACKGROUND/PURPOSE: Dupuytren's disease in children is uncommon; only a few histologically confirmed diagnoses are found in literature. In its early, proliferative phase with many fibroblasts, it can resemble the early stadium of an epitheloid sarcoma, which also is a rare tumor. The purpose of this report is to show pediatric surgeons and pathologists the importance of differential diagnosis of nodules and fibrotic bands in children's hands, especially to exclude a malignancy. METHODS: Between 1998 and 2000, 3 children at ages of 2(1/2) years, 9 years, and 10 years, respectively, presented with the clinical signs of Dupuytren's disease of the hand. Each of them had fibrous bands with a flexion contracture of the fingers. All of them underwent fasciectomy. RESULTS: In patient 1, a 10 degrees extension lag of the index finger resulted after 3 operations. Histology findings showed the typical features of Dupuytren's disease. In patient 2, histology findings showed a recurring digital fibroma of childhood. After consultation with the pathologist and reevaluation of the slides, the histologic diagnosis was corrected to Dupuytren's disease. Full extension and thumb abduction has been achieved. In patient 3, histology of the first and second operation was misdiagnosed as Dupuytren's disease. In the third operation 2(1/2) years later, the histologic diagnosis of epitheloid sarcoma was made. Amputation of the forearm was necessary. CONCLUSIONS: Exact anamnesis, location of the lesion, and suspicious diagnosis must be mentioned to the pathologist in the case of biopsy or excision of Dupuytrenlike lesions in children's hands. Awareness of the possibility of the epitheloid sarcoma may help prevent misdiagnosis.
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Contratura de Dupuytren/diagnóstico , Mãos/patologia , Sarcoma/diagnóstico , Neoplasias Cutâneas/diagnóstico , Fatores Etários , Amputação Cirúrgica/métodos , Criança , Pré-Escolar , Diagnóstico Diferencial , Erros de Diagnóstico , Contratura de Dupuytren/patologia , Contratura de Dupuytren/cirurgia , Feminino , Antebraço/cirurgia , Mãos/cirurgia , Humanos , Masculino , Sarcoma/patologia , Sarcoma/cirurgia , Neoplasias Cutâneas/patologia , Neoplasias Cutâneas/cirurgiaRESUMO
The unreliability of the distal skin component of the gracilis myocutaneous free flap has been frequently reported. To improve the reliability of the skin we orientated the cutaneous paddle in a transverse direction in the proximal third of the gracilis muscle, as first described by Yousif et al in 1993. Their anatomical studies showed that cutaneous branches of the dominant proximal pedicle have a pronounced tendency to travel in a transverse direction, supplying the skin anteriorly over the adductor longus and sartorius muscles and extending beyond the posterior margin of the gracilis muscle. We adopted this transverse design and transferred myocutaneous gracilis flaps measuring up to 17 x 9 cm. The transverse gracilis myocutaneous flap was dissected in the subfascial plane to include the peri-gracilis fascia, which preserved the fascial vascular network and thus optimised skin-paddle perfusion. Ten transverse gracilis myocutaneous free flaps were performed over 3 years. Skin paddles ranged in size from 10 x 7 cm (70 cm(2)) to 17 x 9 cm (153 cm(2)) with a mean of 113.4 cm(2). Five defects were located in the head and neck region, three in the lower leg, one in the thigh and one in the thorax. Patients were followed for an average of 16.6 months (range: 6--46 months). Minor complications (donor-site wound dehiscence and flap-wound-edge separation) occurred in four patients;however, all 10 flaps survived and healed with complete cutaneous survival.
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Procedimentos de Cirurgia Plástica/métodos , Retalhos Cirúrgicos/fisiologia , Adulto , Idoso , Carcinoma Basocelular/cirurgia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Orbitárias/cirurgia , Osteomielite/cirurgia , Retalhos Cirúrgicos/irrigação sanguínea , Deiscência da Ferida Operatória/etiologia , Resultado do TratamentoRESUMO
OBJECTIVE: The purpose of this study was to investigate whether in vitro cultured tracheal epithelial cells can be transplanted onto a prefabricated capsule surface in vivo for possible use in tracheal reconstruction. METHODS: Tracheal epithelial cells from 12 donor inbred rats were harvested for culture and expansion. In 16 recipient inbred rats, 2 sterile cylinders made of silicone rubber were implanted in each rat bilaterally in the folds of both the left and right anterior rectus sheath by wrapping the sheaths around the cylinders to induce a capsule formation. Ten days later, the cell cultures were divided and suspended in 1 of 2 delivery vehicles (standard culture medium or fibrin glue) and implanted onto the capsule surface. To compare the 2 delivery vehicles, we used fibrin glue on one side and the standard culture medium on the other. RESULTS: After 2 (group 1, n = 8) and 4 (group 2, n = 8) weeks, histologic findings, immunohistochemical staining, and electron microscopy demonstrated the capsule to be covered with a tracheal neoepithelium in group 1 and additional ciliated cells and secretory cells in a confluent layer in group 2 but only on the side with fibrin glue as the delivery vehicle. No viable epithelial cells were identified on the side with the standard culture medium in either group. CONCLUSION: We conclude that cultured epithelial cells can be successfully transplanted onto a prefabricated capsule surface with fibrin glue, which will differentiate into morphologic, nearly normal epithelium, showing potential for tracheal reconstruction.
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Cápsulas , Transplante de Células/métodos , Células Epiteliais/transplante , Adesivo Tecidual de Fibrina , Traqueia/transplante , Doenças da Traqueia/patologia , Animais , Células Cultivadas , Sistemas de Liberação de Medicamentos , Masculino , Modelos Animais , Ratos , Ratos Wistar , Procedimentos de Cirurgia Plástica , Sensibilidade e Especificidade , Silicones , Propriedades de Superfície , Doenças da Traqueia/cirurgiaRESUMO
The profusion of terms currently used to describe microvascular flap wound closure according to the time of reconstruction makes reliable comparisons of outcomes between institutions difficult if not impossible. To address the issue, a consistent terminology applicable to microvascular flap wound closure in general was formulated with respect to our experience with a total of 197 microvascular tissue transplantations. The nomenclature presented divides microvascular flap closure into three categories: "primary microvascular flap closure" (within 24 hours). "delayed primary microvascular flap closure" (two to seven days), and "secondary microvascular flap closure" (after seven days). This is consistent with known biological, microbiological, and surgical principles of wound closure in general and should provide a simple basis for classifying microvascular flap wound closure. Sample cases are selected to illustrate the categories within this new classification scheme.
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Traumatismos do Braço/cirurgia , Traumatismos da Mão/cirurgia , Traumatismos da Perna/cirurgia , Microcirurgia/classificação , Lesões dos Tecidos Moles/cirurgia , Retalhos Cirúrgicos/irrigação sanguínea , Terminologia como Assunto , Adolescente , Adulto , Idoso , Criança , Pré-Escolar , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Reoperação , Cicatrização/fisiologiaRESUMO
In a cross-sectional study of outpatients diagnosed with dementia of the Alzheimer type who had been treated with a broad variety of drugs supposed to improve cognition or to delay cognitive decline, we have investigated the effects of abruptly discontinuing therapy on cognition. Termination of therapy with any cholinesterase inhibitor was associated with a cognitive decline during the following 6-7 weeks which was significantly more pronounced than that experienced by patients who had received nootropic drugs or calcium channel blockers (3.41 vs. 1.17 points on the ADAS-Cog scale; -1.14 vs. -0.06 points on the MMSE scale). This effect was not modified by gender, apolipoprotein E genotype, or the extent of ventricular enlargement on CT scans. Its magnitude was comparable to the cognitive response observed in published clinical trials when cholinesterase therapy commenced, and also with the data obtained during a 6-week placebo washout phase.
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Doença de Alzheimer/tratamento farmacológico , Doença de Alzheimer/psicologia , Inibidores da Colinesterase/uso terapêutico , Transtornos Cognitivos/tratamento farmacológico , Transtornos Cognitivos/psicologia , Nootrópicos/uso terapêutico , Síndrome de Abstinência a Substâncias/psicologia , Acetilcolinesterase/metabolismo , Idoso , Idoso de 80 Anos ou mais , Doença de Alzheimer/genética , Apolipoproteína E4 , Apolipoproteínas E/genética , Transtornos Cognitivos/genética , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Síndrome de Abstinência a Substâncias/tratamento farmacológico , Síndrome de Abstinência a Substâncias/genéticaRESUMO
A 56-year-old woman sustained a delayed median nerve division after a penetrating injury of the right wrist by a piece of wood had gone unnoticed. There was no neurological damage at the time of the injury. The foreign body spread the median nerve apart, which subsequently reduced the sensitivity in the index finger. Removal of the wood resulted in complete recovery.