Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 64
Filtrar
1.
Lymphology ; 49(3): 157-64, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-29906083

RESUMO

The aim of this study was to investigate lymph circulation before and after breast reduction mammaplasty in different parts of the breast and with two different carriers of the radiopharmaceutical. Nine patients with breast hypertrophy planned for bilateral breast reduction mammaplasty were prospectively included in the study. The breast operation procedure was decided on intraoperatively. The regional lymph circulation in the breast was measured preoperatively by Technetium (99mTc) clearance in 4 different locations in each breast 1, 2 and 3 hours after injection. The procedure was repeated at one month and in six of the nine women also five years postoperatively with injection sites chosen to correspond to the preoperative location of that breast pedicle. Two different types of carriers of the radiopharmaceutical were tested, dextran in the right and nanocoll in the left breast. Dextran had a much more rapid clearance than nanocoll. There was no significant regional difference in lymph drainage up to five years after the mammaplasty, independent of dextran or nanocoll as being the carrier of the radiopharmaceutical.


Assuntos
Mama/cirurgia , Vasos Linfáticos/diagnóstico por imagem , Mamoplastia , Adulto , Mama/anormalidades , Mama/diagnóstico por imagem , Dextranos , Feminino , Humanos , Hipertrofia , Vasos Linfáticos/fisiologia , Vasos Linfáticos/fisiopatologia , Linfedema/diagnóstico por imagem , Linfedema/fisiopatologia , Linfocintigrafia , Pessoa de Meia-Idade , Compostos de Organotecnécio , Complicações Pós-Operatórias/diagnóstico por imagem , Complicações Pós-Operatórias/fisiopatologia , Período Pré-Operatório , Estudos Prospectivos , Compostos Radiofarmacêuticos , Agregado de Albumina Marcado com Tecnécio Tc 99m
2.
Eur J Surg Oncol ; 34(2): 143-8, 2008 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-17709228

RESUMO

AIM: Validation of the oncological safety of nipple-sparing subcutaneous mastectomy and immediate reconstruction with implants (NSM) and of the outcome in patients with locoregional recurrences (LRRs) after this procedure. METHODS: Two-hundred and sixteen patients, mean age of 52.8 (29-81) years with primary unilateral breast cancer, not suitable for partial mastectomy because of large (>3cm) or multifocal carcinoma, underwent NSM, a single procedure lasting about 1h 30min, between December 1988 and September 1994. Lymph node metastases were found in 40.3% of the patients, and 47 patients received radiotherapy (RT) postoperatively. All patients were monitored for at least 11.6 years or as long as they lived. Median follow-up was 13 years. The end-points were locoregional recurrence (LRR) or distant metastases (DM) as first events, disease-free survival (DFS) and overall survival (OS). RESULTS: Specificity at frozen section from sub-areolar tissues was 98.5%. LRR occurred in 52 patients and DM in 44 patients. DFS was 51.3% and OS was 76.4%. The frequency of LRR was 8.5% among irradiated and 28.4% among non-irradiated patients (p=0.025). These results compare well with results after conventional mastectomy in other trials. All patients were monitored for at least 6 years after the occurrence of LRR, finding 5 years freedom from further LRR or DM of 60% and OS of 82%. CONCLUSIONS: NSM is an oncologically safe procedure and could be offered to most patients with breast cancer unsuitable for sector resection only. RT effectively lowers the frequency of LRR. The occurrence of LRR after this operation does not significantly affect OS.


Assuntos
Implantes de Mama , Neoplasias da Mama/mortalidade , Neoplasias da Mama/cirurgia , Mastectomia Subcutânea/métodos , Recidiva Local de Neoplasia/mortalidade , Procedimentos de Cirurgia Plástica/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/patologia , Causas de Morte , Intervalo Livre de Doença , Feminino , Seguimentos , Humanos , Imuno-Histoquímica , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/patologia , Estadiamento de Neoplasias , Mamilos , Probabilidade , Estudos Prospectivos , Medição de Risco , Estatísticas não Paramétricas , Análise de Sobrevida , Fatores de Tempo , Resultado do Tratamento
3.
Acta Radiol ; 48(5): 488-95, 2007 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-17520423

RESUMO

PURPOSE: To investigate lymphatic drainage as measured by lymphoscintigraphy in the arms of patients undergoing either sentinel lymph node biopsy (SNB) or axillary lymph node dissection (ALND). MATERIAL AND METHODS: From January 2001 to December 2002, 30 patients with unilateral invasive breast carcinoma underwent breast-conserving surgery with SNB and 30 patients with ALND. All patients received radiotherapy to the breast. Lymphoscintigraphy was performed, and skin circulation, skin temperature, and arm volume were measured 2-3 years after radiotherapy. RESULTS: None of the 30 patients who underwent SNB showed any clinical manifestation of lymphedema. Of the 30 patients undergoing ALND, six (20%) had clinical lymphedema, with an arm volume that was >10% larger on the operated than on the non-operated side (P<0.01). Scintigraphically, visual analysis revealed lymphatic dysfunction in three patients, manifested as forearm dermal back flow. Two of these patients also had an increased arm volume. Quantitative analysis showed no differences between the groups, apart from a smaller amount of isotope in the axilla in the ALND group. There was no difference in skin circulation or skin temperature. CONCLUSION: Our study shows that lymph drainage in the operated arm compared with the non-operated arm was less affected by SNB than by ALND, and that morbidity associated with SNB was lower than with ALND. However, the results do not confirm our hypothesis that lymphoscintigraphy can reveal differences in lymph circulation that are not evident clinically in the form of manifest lymphedema. The most sensitive clinical method of assessing lymph drainage seems to be measurement of arm volume.


Assuntos
Braço/diagnóstico por imagem , Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/patologia , Excisão de Linfonodo , Linfa/fisiologia , Mastectomia Segmentar , Biópsia de Linfonodo Sentinela , Axila , Neoplasias da Mama/terapia , Feminino , Humanos , Linfedema/diagnóstico por imagem , Pessoa de Meia-Idade , Cintilografia
4.
Lymphology ; 39(1): 33-40, 2006 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-16724508

RESUMO

The aim of this study was to investigate the breast lymph circulation and skin blood circulation after radiotherapy and breast conservation. In 23 patients who had undergone lumpectomy for breast cancer (mean age 58 years, range 44-75) and 12 patients with lumpectomy for benign lesions (mean age 51 years, range 33-72), lymph circulation in the breast was measured by 99mTc-nanocolloid clearance and skin circulation by Laser Doppler Fluxmetry (LDF). Measurements were made 2-5 years after radiotherapy (50 Gy) in the former group and at a corresponding time in the latter. The lymph circulation was measured 2 cm above and medial or lateral to the areolar border in the quadrant not operated on for carcinoma. Skin circulation was measured at corresponding sites. The lymph circulation expressed as the ratio of 99mTc-nanocolloid clearance in the operated irradiated to that in the non-operated (radiation 2-4 Gy) breast was 2.33 (2.66) (median, interquartile range) (p value 0.01) and the skin circulation ratio over the corresponding area was 0.92 (0.21). Corresponding ratios in the non-radiotherapy group were 2.07 (1.96) (p value 0.03) and 1.04 (0.18) respectively. Compared with the control breast (i.e., the non-operated non-irradiated breast), there was a 4-fold increase in lymph flow in the operated, irradiated breast, a 2.5-fold increase in the contralateral non-operated (2-4 Gy) breast and a 1.5-fold increase in the operated non-irradiated breast. Radiotherapy after breast conservation surgery leads to increased long-term changes in basal lymph circulation and smaller increases in lymph flow in the contralateral breast receiving 2-4 Gy and after surgery. If maximal lymph transport capacity is unchanged, edema may be more likely in this circumstance of reduced lymphatic transport reserve.


Assuntos
Neoplasias da Mama/fisiopatologia , Mama/irrigação sanguínea , Sistema Linfático/fisiopatologia , Pele/irrigação sanguínea , Adulto , Idoso , Neoplasias da Mama/radioterapia , Neoplasias da Mama/cirurgia , Feminino , Humanos , Sistema Linfático/efeitos da radiação , Sistema Linfático/cirurgia , Linfedema/etiologia , Mastectomia Segmentar/efeitos adversos , Pessoa de Meia-Idade , Radioterapia Adjuvante/efeitos adversos , Fluxo Sanguíneo Regional
5.
J Plast Reconstr Aesthet Surg ; 59(1): 27-34, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16482787

RESUMO

One hundred and seven breast cancer patients underwent subcutaneous mastectomy and immediate reconstruction with a subcutaneously-placed, round, saline-filled prosthesis with a textured surface. The primary aim of this prospective study was to determine the frequency of capsular contracture in both irradiated and non-irradiated breasts after this operation. Two different types of round implants with different pore sizes on their textured surfaces, Siltex and Microcell, were randomly chosen. Twenty-four patients received radiotherapy within the first year following the operation. Capsular contracture was measured by the Baker/Palmer classification and by applanation tonometry at regular intervals for 5 years or as long as the patients lived (median 60 months). Twenty-two patients (20.6%) developed capsular contracture, defined as Baker three or four. Sixteen of those were reoperated, 15 with open capsulotomy with or without implant exchange, one with closed compression capsulotomy, and monitored thereafter for 5 years or until death (median 60 months). All 107 patients could be monitored for 2 years, while 87 reported for the 5-year follow-up. The rate of capsular contracture was significantly higher (p=0.01) for irradiated breasts than for non-irradiated ones, 41.7 and 14.5%, respectively. It was slightly higher (p<0.05) for large-pore implants than for those with smaller (and more numerous) pores. There was a good correlation between the two different methods for measuring capsular contracture. None of the 16 reoperated patients had a recurrence of capsular contracture within 5 years. The results indicate a high rate of capsular contracture after this operation, especially when followed by radiation. However, a fairly simple procedure to treat capsular contracture seems to give good long-term results.


Assuntos
Implantes de Mama , Neoplasias da Mama/radioterapia , Contratura/etiologia , Mamoplastia/instrumentação , Adulto , Idoso , Neoplasias da Mama/cirurgia , Feminino , Seguimentos , Humanos , Mamoplastia/métodos , Manometria , Mastectomia , Pessoa de Meia-Idade , Estudos Prospectivos , Desenho de Prótese , Radioterapia Adjuvante/efeitos adversos , Cloreto de Sódio , Propriedades de Superfície
6.
Eur J Cancer ; 42(5): 617-20, 2006 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-16446084

RESUMO

The aim of this study was to compare the sensitivity of intraoperative frozen section with hematoxyllin-eosin (H&E) staining, immunohistochemistry (IHC) or imprint cytology (IC) in the analysis of sentinel node (SN) in breast cancer. Towards this end, a prospective study of 102 patients undergoing mastectomy or sector resection with SN biopsy was conducted. Frozen sections of SN with H&E, IHC staining and IC had sensitivities of 73.5%, 75.5% and 51.0%, respectively. The combination of H&E and IHC raised the overall sensitivity to 83.7%. Macrometastases (>2 mm) were detected in 100% of the cases with H&E, 92.6% with IHC and 81.5% with IC; and micrometastases (2 mm) in 35.0%, 45.0% and 5.0%, respectively. The combination of H&E and IHC staining raised the sensitivity to 55.0%. Frozen-section analysis with H&E staining showed high sensitivity in detecting macrometastases but not micrometastases. The sensitivity for detection of micrometastases was not substantially increased by the use of intraoperative IHC. Imprint cytology did not provide any additional information.


Assuntos
Neoplasias da Mama/patologia , Carcinoma Ductal de Mama/secundário , Carcinoma Lobular/secundário , Adenocarcinoma Mucinoso/secundário , Adulto , Idoso , Idoso de 80 Anos ou mais , Axila , Neoplasias da Mama/cirurgia , Feminino , Secções Congeladas/normas , Humanos , Imuno-Histoquímica , Período Intraoperatório , Pessoa de Meia-Idade , Estudos Prospectivos , Sensibilidade e Especificidade , Biópsia de Linfonodo Sentinela/normas
7.
Acta Radiol ; 44(4): 373-8, 2003 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-12846686

RESUMO

PURPOSE: To investigate the value of pre-operative contrast-enhanced MR imaging (CE-MRI) in predicting the disease-free and overall survival in breast cancer. MATERIAL AND METHODS: The study population consisted of 50 consecutive patients with histopathologically verified primary breast cancer who pre-operatively underwent CE-MRI examination between 1992 and 1993. A three-time point MR examination was performed where the enhancement rates (C1 and C2), signal enhancement ratio (SER=C1/C2) and washout (W=C1-C2) were calculated. The relation of these MR parameters to disease-free and overall survival was investigated. The median follow-up for surviving patients was 95 months. Univariate and multivariate statistical analyses were performed to evaluate the impact of different factors on prediction of survival. RESULTS: Of the MR parameters examined at univariate analysis, increased C1 (p=0.029), W (p=0.0081) and SER values (p=0.0081) were significantly associated with shorter disease-free survival, and only C1 (p=0.016) was related significantly to overall survival. Multivariate analysis for disease-free survival showed that the SER (p=0.014) and tumor size (p=0.001) were significant and independent predictors. Age (p=0.003), lymph node status (p=0.014), tumor size (p=0.039) and proliferating cell nuclear antigen index (p=0.053) remained independently associated with overall survival at multivariate analysis. C1 was not confirmed as an independent predictor of overall survival. CONCLUSION: Our findings support the presumption that CE-MRI is useful in predicting the disease-free survival in patients with breast cancer.


Assuntos
Neoplasias da Mama/mortalidade , Neoplasias da Mama/patologia , Imageamento por Ressonância Magnética/métodos , Meios de Contraste , Intervalo Livre de Doença , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Análise Multivariada , Valor Preditivo dos Testes , Prognóstico , Análise de Sobrevida , Fatores de Tempo
8.
Langenbecks Arch Surg ; 388(2): 112-5, 2003 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-12712341

RESUMO

BACKGROUND: Postsurgical adhesion formation is a common occurrence after most surgical procedures and is still a major cause of postoperative morbidity because no satisfactory treatment or prophylaxis has yet been developed. Further elucidation of the basic mechanisms of postsurgical adhesion formation is needed. Recent studies using germfree rats have found the indigenous bowel flora to be important in the adhesive response. The present study examined whether antibiotic treatment affects intra-abdominal adhesion formation. METHODS: Using the cecal crush model to inflict adhesions, groups of rats ( n=12) were treated with placebo or amoxicillin/clavulanic acid in the drinking water. Treatment started 3 days before operation and continued until evaluation. Adhesion scores were recorded after 7 days. Bacterial counts were made from cultures of fecal samples on operation day and at termination. RESULTS: Amoxicillin/clavulanic acid decreased adhesion score compared to placebo. Adhesion incidence was 50% in the treatment group and 92% in the placebo group. Bacterial numbers were lower in the treatment group. CONCLUSIONS: Antibiotic treatment which lowers bacterial numbers can decrease adhesions.


Assuntos
Combinação Amoxicilina e Clavulanato de Potássio/uso terapêutico , Quimioterapia Combinada/uso terapêutico , Doenças Peritoneais/prevenção & controle , Complicações Pós-Operatórias/prevenção & controle , Abdome , Animais , Feminino , Masculino , Distribuição Aleatória , Ratos , Ratos Endogâmicos , Aderências Teciduais/prevenção & controle
9.
Acta Radiol ; 43(3): 275-81, 2002 May.
Artigo em Inglês | MEDLINE | ID: mdl-12100324

RESUMO

PURPOSE: To evaluate the value of dynamic MR imaging as an adjunctive tool to triple diagnosis (TD) (physical examination, mammography and fine needle aspiration cytology) in diagnosing breast lesions. MATERIAL AND METHODS: Ninety-three consecutive patients with 114 palpable or mammographically detected breast lesions were examined with TD and MR imaging. The MR examination was performed dynamically using a dedicated breast coil. Five diagnostic groups were defined on a scale from 1=normal, to 5 = malignant, where groups 1-3 were defined as benign and groups 4-5 as malignant. All lesions were histopathologically examined. The sensitivity and specificity were calculated for mammography alone, TD, MR and the combination of MR and TD. RESULTS: Histopathology revealed 32 benign and 82 malignant lesions (73 invasive and 9 cancer in situ). The sensitivity/specificity was 84%/59% for mammography, 93%/41% for TD, 94%/47% for MR and 99%/19% for TD + MR. In the 32 mammographically dense breasts, mammography/TD/MR/TD + MR had a sensitivity of 72%/94%/94%/100% and a specificity of 79%/57%/36%/29%, respectively. CONCLUSION: MR imaging might be of value as an additive method to TD by increasing the sensitivity, but at the cost of decreasing specificity. Patients with mammographically dense parenchyma might have more benefit of the additive value, as the decrease in specificity in these patients was less pronounced in our study.


Assuntos
Doenças Mamárias/diagnóstico , Adulto , Idoso , Idoso de 80 Anos ou mais , Biópsia por Agulha , Doenças Mamárias/diagnóstico por imagem , Doenças Mamárias/patologia , Neoplasias da Mama/diagnóstico , Feminino , Humanos , Imageamento por Ressonância Magnética , Mamografia , Pessoa de Meia-Idade , Exame Físico , Sensibilidade e Especificidade
10.
Eur J Surg ; 167(7): 497-500, 2001 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-11560383

RESUMO

OBJECTIVE: To investigate the breast circulation after radiotherapy and breast conservation. DESIGN: Open clinical study. SETTING: University hospital, Sweden. SUBJECTS: 24 patients with breast cancer (mean age 54 years, range 41-64). INTERVENTIONS: The glandular and the subcutaneous circulation in the breast were measured by Xenon (133Xe) clearance and the skin circulation by laser Doppler fluxmetry (LDF) two to five years after radiotherapy (50 Gy) following lumpectomy. The subcutaneous circulation was measured 2 cm above and medial or lateral to the areolar border and the glandular circulation 2 cm below and medial or lateral to the areolar border in the quadrant not previously operated on for carcinoma. The skin circulation was measured at the corresponding sites. MAIN OUTCOME MEASURES: Circulation in the subcutaneous and glandular tissue measured by 133Xe clearance and in the skin by LDF. RESULTS: The subcutaneous circulation, expressed as the ratio of 133Xe clearance in the operated irradiated: non-operated non-irradiated breast, was 0.88 (0.94) (median, interquartile range) and the glandular circulation 0.93 (0.75). The skin circulation ratios over the corresponding areas were 1.00 (0.37) and 1.00 (0.38), respectively. CONCLUSION: Radiotherapy after breast conservation surgery does not lead to long-term changes in basal glandular, subcutaneous, or skin circulation in the breast.


Assuntos
Neoplasias da Mama/fisiopatologia , Mama/irrigação sanguínea , Mastectomia Segmentar , Adulto , Neoplasias da Mama/radioterapia , Neoplasias da Mama/cirurgia , Feminino , Humanos , Pessoa de Meia-Idade , Período Pós-Operatório , Dosagem Radioterapêutica , Radioterapia Adjuvante , Fluxo Sanguíneo Regional , Pele/irrigação sanguínea
11.
Br J Surg ; 88(1): 143-5, 2001 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-11136328

RESUMO

BACKGROUND: Postsurgical adhesion formation is still a cause of postoperative morbidity because no satisfactory treatment or prophylaxis has yet been developed. The present study was designed to investigate the influence of the gastrointestinal flora on adhesion formation around surgical anastomoses. METHODS: Anastomoses were constructed in germfree, conventional, ex-germfree and mono- contaminated rats (Escherichia coli X7 and Lactobacillus acidophilus La5), and adhesion formation was recorded. RESULTS: The germfree group had a significantly lower adhesion score than all other groups (P < 0.05) apart from the lactobacillus group, which had a significantly lower score than the conventional group (P < 0.05). CONCLUSION: The bacterial flora of the gastrointestinal tract enhances adhesion formation around surgical anastomoses.


Assuntos
Intestinos/microbiologia , Aderências Teciduais/microbiologia , Anastomose Cirúrgica , Animais , Escherichia coli/fisiologia , Lactobacillus acidophilus/fisiologia , Ratos , Ratos Endogâmicos
12.
Eur J Surg ; 167(11): 825-30, 2001 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11848236

RESUMO

OBJECTIVE: Infiltration and topical application of local anaesthetics close to the surgical wound may be used to prevent postoperative pain. We evaluated the efficacy of these treatments after breast surgery for cancer. DESIGN: Double-blind randomised trial with two treatment groups and one control group. SETTING: University hospital, Sweden. INTERVENTIONS: Patients were allocated to treatment with bupivacaine infiltration (n = 29), topical application of lignocaine/prilocaine (n = 31), or no local treatment (n = 30). MAIN OUTCOME MEASURES: Difference and time related patterns in pain scores measured on a visual analogue scale (VAS), and morphine consumption. RESULTS. None of the local anaesthetics significantly reduced the VAS score or morphine consumption. However, fewer patients in the anaesthetic groups had high VAS scores than controls, the 75 centile for the mean score after operation being 2.7, 2.0 and 2.1 for the controls, infiltration, and topical anaesthetic groups, respectively. The controls had higher scores from 6 hours postoperatively onwards. The corresponding median morphine consumption was 24.5, 18.5, and 16.2 mg. CONCLUSIONS. Local anaesthesia slightly reduced the overall pain scores and the morphine consumption, but was of potential clinical value only in the patients who had the highest pain scores.


Assuntos
Anestésicos Locais/administração & dosagem , Neoplasias da Mama/cirurgia , Bupivacaína/administração & dosagem , Lidocaína/administração & dosagem , Mastectomia Segmentar , Dor Pós-Operatória/tratamento farmacológico , Prilocaína/administração & dosagem , Administração Tópica , Adulto , Idoso , Idoso de 80 Anos ou mais , Analgesia Controlada pelo Paciente , Método Duplo-Cego , Sinergismo Farmacológico , Feminino , Humanos , Combinação Lidocaína e Prilocaína , Mastectomia Segmentar/efeitos adversos , Pessoa de Meia-Idade , Morfina/administração & dosagem , Medição da Dor , Dor Pós-Operatória/etiologia , Resultado do Tratamento
13.
Scand J Plast Reconstr Surg Hand Surg ; 34(1): 65-70, 2000 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-10756578

RESUMO

We compared the incidence of capsular contracture in an implant (Bioplasty Misti Gold II) which has a textured surface and is filled with polyvinyl-pirrolidone (PVP)-hydrogel, with that in saline-filled implants with textured surfaces when the implants are placed subcutaneously during immediate reconstruction after subcutaneous mastectomy. In 41 patients, mean age 55 years (range 30-81), with breast cancer that was not suitable for breast conservation, 20 patients had 22 Misti Gold II prostheses inserted (two patients bilaterally) and 21 patients had saline-filled prostheses (one patient bilaterally). The development of capsular contracture was assessed using Baker's classification and applanation tonometry. Fourteen patients with Misti Gold II implants were classified one year postoperatively as Baker 2 and 3 compared with five with saline-filled implants (p = 0.01). On applanation tonometry 16 of the Misti Gold II group had an operative:postoperative ratio of < or = 0.75, compared with 50% in the saline-filled group (p = 0.096). In the 12 Misti Gold II prostheses that were removed because of capsular contracture between 13-40 months postoperatively, the volume in the prostheses had increased by 48%. The poor results obtained with the Misti Gold II prosthesis can be explained by the volume that they gained after implantation as a result of osmosis.


Assuntos
Implantes de Mama/efeitos adversos , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/radioterapia , Neoplasias da Mama/cirurgia , Feminino , Humanos , Metástase Linfática , Mastectomia Subcutânea , Pessoa de Meia-Idade , Desenho de Prótese , Radioterapia Adjuvante , Resultado do Tratamento
14.
AIDS ; 13(15): 2013-21, 1999 Oct 22.
Artigo em Inglês | MEDLINE | ID: mdl-10546853

RESUMO

OBJECTIVES: Dendritic cells (DC) are potential first target cells in sexually transmitted HIV-1 infection. They are also considered to be central in the activation of naive T cells, which thereupon can become permissive for HIV-1. In addition, activated DC express effector molecules, which likely contribute to the direction of T helper (Th1/Th2)-specific immune responses. METHODS: The capacity of cytokine and chemokine production in in vitro DC infected and uninfected with HIV-1 was assessed by enzyme-linked immunosorbent assay (ELISA) and by in situ immunocytochemical detection at the single cell level. Fluorescent in situ 5'-nuclease assay (FISNA) was used for quantitative evaluation of HIV-1 gag-positive cells. RESULTS: Macrophage-tropic HIV-1 effectively infected 20-40% of in vitro cultured DC. However, this activity alone did not induce detectable cytokine or chemokine protein expression in DC. In contrast, lipopolysaccharide (LPS) stimulation of these HIV-1-infected DC resulted in a significantly increased level of cells producing tumour necrosis factor alpha (TNF-alpha) and interleukin (IL) 1beta but reduced frequencies of cells producing IL-1 receptor antagonist (IL-1ra) compared with the LPS-stimulated but uninfected DC cultures (P < 0.05). Furthermore, an extensive production of the beta-chemokines [RANTES, macrophage inflammatory proteins (MIP) 1alpha and 1beta] was detected in DC in response to both LPS and HIV-1 plus LPS. CONCLUSIONS: These findings indicate that HIV-1 infected DC may have an increased proinflammatory activity. Elevated production of cytokines such as TNF-alpha and IL-1beta and reduced IL-1ra may contribute to enhanced replication of HIV-1 in bystander T cells. Gram-negative bacterial infection and gut-associated bacterial translocation in HIV-1-infected individuals may also result in endotoxin-mediated reactivation of HIV-1 in bystander CD4 CD45RO T cells caused by the increased production of proinflammatory cytokines in DC.


Assuntos
Citocinas/biossíntese , Células Dendríticas/virologia , Infecções por HIV/imunologia , HIV-1/imunologia , Células Cultivadas , Quimiocinas/biossíntese , DNA Viral/análise , Genes gag/genética , Infecções por HIV/fisiopatologia , Infecções por HIV/virologia , Humanos , Proteína Antagonista do Receptor de Interleucina 1 , Interleucina-1/biossíntese , Lipopolissacarídeos/farmacologia , Receptores de Interleucina/antagonistas & inibidores , Sialoglicoproteínas/biossíntese , Fator de Necrose Tumoral alfa/biossíntese , Replicação Viral
15.
Acta Radiol ; 40(5): 491-5, 1999 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-10485237

RESUMO

PURPOSE: The aim of our prospective study was to evaluate the role of planar scintimammography with 99mTc-MIBI in detecting axillary lymph node metastases in women with primary breast carcinoma. MATERIAL AND METHODS: Fifty-eight patients underwent scintimammography rior to axillary lymph node dissection. Ten minutes after injection of 700 MBq 99mTc-MIBI, two prone lateral projections were obtained, followed by a supine anterior projection. Sixty-one axillae (3 bilateral) were operated upon and the status of the lymph nodes verified with histopathology. The scintigraphic result was compared to the histopathologic findings. RESULTS: A sensitivity of 67% and a specificity of 80% of planar scintimammography in detecting axillary lymph node metastases were achieved. CONCLUSION: Scintimammography with 99mTc-MIBI is not recommended as a routine method for the detection of axillary lymph node metastases in patients with breast carcinoma.


Assuntos
Neoplasias da Mama/diagnóstico por imagem , Carcinoma in Situ/diagnóstico por imagem , Linfonodos/diagnóstico por imagem , Tecnécio Tc 99m Sestamibi , Axila , Neoplasias da Mama/patologia , Carcinoma in Situ/patologia , Diagnóstico Diferencial , Erros de Diagnóstico , Feminino , Humanos , Linfonodos/patologia , Metástase Linfática , Estudos Prospectivos , Cintilografia , Compostos Radiofarmacêuticos , Sensibilidade e Especificidade
16.
Br J Plast Surg ; 52(5): 360-4, 1999 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-10618978

RESUMO

The skin circulation was measured in 43 breast cancer patients following subcutaneous mastectomy and immediate reconstruction with a prosthesis, at least 1 year after radiotherapy (46 Gy) following surgery (19 patients) or if no radiotherapy was given, at least 1 year postoperatively (24 patients). The skin circulation was measured by laser Doppler fluxmetry (LDF) and fluorescein flowmetry within three areas: 2 cm above the border of the areola, within the nipple-areola complex, and 2 cm below the border of the areola. The results show that there was no reduction in skin circulation. On the contrary LDF and fluorescein flowmetry showed in the operated breast an increased circulation in the nipple-areola complex in the irradiated breast compared with the non-irradiated by 26% and 30%, respectively (P < 0.05). The results indicate that radiotherapy following subcutaneous mastectomy and immediate reconstruction with a prosthesis does not lead to long-term reduction in basal skin circulation in the breast.


Assuntos
Neoplasias da Mama/radioterapia , Mama/irrigação sanguínea , Mastectomia Subcutânea , Pele/irrigação sanguínea , Adulto , Idoso , Neoplasias da Mama/cirurgia , Feminino , Seguimentos , Humanos , Fluxometria por Laser-Doppler , Pessoa de Meia-Idade , Radioterapia Adjuvante , Fluxo Sanguíneo Regional/efeitos da radiação
17.
Nord Med ; 113(9): 297-8, 316, 1998 Nov.
Artigo em Sueco | MEDLINE | ID: mdl-9835760

RESUMO

In order to grow beyond 2-3 mm in size, a primary tumour or metastasis must induce angiogenesis, the formation of new blood vessels. Tumour capillary content is an independent prognostic factor, usually measured as the mean of three counts in capillary-rich areas of the histological section. Either as single drugs or in combination with other treatment, angiostatic agents probably represent the future of cancer treatment.


Assuntos
Neoplasias/irrigação sanguínea , Neovascularização Patológica/tratamento farmacológico , Capilares/efeitos dos fármacos , Capilares/patologia , Previsões , Humanos
18.
Pediatr Res ; 43(4 Pt 1): 555-8, 1998 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-9545014

RESUMO

In healthy infants, the levels of TSH are known to peak at 50-100 times adult values during the first days of life. In studies of isolated human infant adipocytes, we have earlier shown that bovine TSH (bTSH) has a strong lipolytic effect, accompanied by a blunted response of adipocytes to catecholamines. In this study, we used human recombinant TSH (hTSH), and incubation of adipocytes with hTSH induced a lipolytic response similar to that obtained with the beta-adrenergic receptor agonist isoprenaline in adipocytes isolated from three infants. The lipolytic effect of hTSH was completely blocked by inhibitory TSH receptor (TSHR) antibodies. The TSHR mediates the effects of TSH in the thyroid, and it has been detected in some extrathyroid tissues, but not in isolated human adipocytes or childhood adipose tissue. In this study, we found TSHR RNA in infant and adult adipose tissues and isolated adipocytes with reverse transcriptase-PCR. The sequence of the amplified PCR product agreed with the published sequence. Northern blot hybridization on RNA prepared from infant adipose tissue showed a transcript of the expected size, and the expression of TSHR seemed higher in infant than in adult adipose tissue. In conclusion, this study indicates that TSH plays an active role in the metabolic adaptation after birth.


Assuntos
Adipócitos/química , Tecido Adiposo/crescimento & desenvolvimento , Receptores da Tireotropina/análise , Adulto , Animais , Northern Blotting , Bovinos , Criança , Humanos , Lactente , Lipólise , Reação em Cadeia da Polimerase , RNA/análise , Receptores da Tireotropina/genética , Proteínas Recombinantes/farmacologia , Tireotropina/farmacologia
19.
Br J Plast Surg ; 50(6): 443-9, 1997 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-9326148

RESUMO

Touch sensibility was assessed with von Frey's monofilaments in the breasts of 10 healthy women (controls) and of 80 women with breast cancer who at least 1 year previously had undergone subcutaneous mastectomy and immediate reconstruction with a prosthesis. Touch thresholds were measured at nine positions on each breast. Low threshold values (< 3.2 mN) and good reproducibility were found in the controls. In the patients' surgically treated breasts normal (< 3.2 mN) or subnormal (< 20 mN) median threshold values were found outside the areola. Higher median values were noted on the areola and nipple; on the nipple, however, one third of the patients had normal sensibility while 14% lacked sensibility. The only factors found to influence the results were simultaneous subcutaneous reduction mammaplasty (lower touch thresholds) and the localisation of the incision (slightly lower thresholds for lazy-S than inframammary incision). These results confirm the clinical impression that touch sensibility is substantially retained after subcutaneous mastectomy and immediate reconstruction with a prosthesis.


Assuntos
Implantes de Mama , Hipestesia/etiologia , Mamoplastia , Mastectomia Subcutânea/efeitos adversos , Tato , Idoso , Idoso de 80 Anos ou mais , Mama/fisiopatologia , Neoplasias da Mama/terapia , Feminino , Humanos , Mastectomia Subcutânea/métodos , Pessoa de Meia-Idade , Mamilos/fisiopatologia , Limiar Sensorial
20.
Acta Radiol ; 38(4 Pt 1): 489-96, 1997 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-9240665

RESUMO

PURPOSE: To determine the sensitivity and specificity of X-ray mammography and of MR imaging in 238 consecutively operated breasts, and to correlate the findings to histopathological diagnosis. MATERIAL AND METHODS: Over 15 months, 220 patients scheduled for breast surgery were examined consecutively, before surgery, by means of both mammography and MR imaging. Of the 220 patients, 18 underwent bilateral breast surgery. The entire breast was examined by means of T1-weighted transversal images using a 3D fast low-angle shot (FLASH) sequence. One pre- and 2 post-contrast scans were performed. Each breast was examined by means of mammography and 3 views were applied as routine. All palpable and mammographically suspect lesions were examined on additional images as microfocus magnification or spot compression. The two methods were evaluated independently of each other. RESULTS: In total, 145 malignant and 93 benign lesions were found at histopathological examination. The sensitivity of mammography was 89% and MR imaging 92%. The specificity was 72% in both methods. When the results of the 2 methods were combined, a sensitivity of 99% and a specificity of 55% was achieved. CONCLUSION: Mammography and MR imaging seemed to complement each other to produce a high sensitivity. Unfortunately it is impossible at present to supplement mammography with MR imaging in each patient as a routine owing to the current technical and financial limitations.


Assuntos
Neoplasias da Mama/diagnóstico , Imageamento por Ressonância Magnética/métodos , Mama/patologia , Doenças Mamárias/diagnóstico , Doenças Mamárias/diagnóstico por imagem , Doenças Mamárias/cirurgia , Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/cirurgia , Meios de Contraste , Reações Falso-Negativas , Reações Falso-Positivas , Feminino , Gadolínio , Gadolínio DTPA , Humanos , Mamografia , Pessoa de Meia-Idade , Compostos Organometálicos , Ácido Pentético/análogos & derivados , Sensibilidade e Especificidade
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...