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1.
Langenbecks Arch Surg ; 405(5): 665-672, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32594236

RESUMO

PURPOSE: Despite the implementation of minimally invasive surgery and enhanced recovery protocols, the use of drain in elective splenectomy is still controversial. The aim of this study was to assess whether the abdominal drain can impact on short-term outcome after elective laparoscopic splenectomy. METHODS: This is a retrospective analysis of a consecutively collected database including all patients who underwent elective laparoscopic splenectomy in our institution between January 2001 and June 2019. Postoperative complications were defined according to a priori criteria and graded according to Clavien-Dindo classification. All complications that occurred during hospitalization or within 30 days after discharge were considered. Primary endpoint was postoperative morbidity, and secondary endpoint was postoperative hospital length of stay. RESULTS: One hundred and sixty-one patients were analysed. Intraperitoneal drain was placed in 75 (46.6%) patients. Postoperative complications occurred in 36 (22.4%) patients, while 8 (4.9%) patients had major complications. Median postoperative length of stay was 4 days. At multivariate analysis, only malignancy was significantly associated with the onset of complications (OR 3.50; 95% CI 1.1-11.0; p = 0.032). Malignancy, ASA > 2, conversion to open surgery, presence of drain and longer operation were significantly associated with prolonged length of stay. Patients with drain showed a greater unadjusted risk of abdominal collections (RR 10.32; 95% CI 1.3-79.6; p = 0.006). CONCLUSION: Abdominal drain did not reduce morbidity and prolonged the length of stay following elective laparoscopic splenectomy. Therefore, the present study does not support the routine use of drain in such procedure.


Assuntos
Drenagem/métodos , Laparoscopia , Futilidade Médica , Esplenectomia/métodos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Feminino , Humanos , Tempo de Internação/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/prevenção & controle , Estudos Retrospectivos
2.
J Biol Inorg Chem ; 19(4-5): 715-26, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24510295

RESUMO

The aim of this study is to describe the synthesis of, relaxometric characterization of, pharmacokinetic properties of, and animal imaging experiments with a new, low molecular weight gadolinium complex with high binding affinity toward serum albumin. The gadolinium(III) chelate (B25716/1) is based on the structure of the heptadentate ligand 1,4-bis(hydroxycarbonylmethyl)-6-[bis(hydroxycarbonylmethyl)]amino-6 methylperhydro-1,4-diazepine (AAZTA) covalently conjugated to an analogue of deoxycholic acid. The study was conducted as a comparison with that of an analogous complex based on the octadentate diethylenetriaminepentaacetic acid ligand B22956/1 (whose albumin binding properties were previously assessed). The structural modification with respect to B22956/1 leads to a system that can host two coordinated water molecules in fast exchange with bulk water with potential higher efficiency as an MRI contrast agent. On interaction with human serum albumin the expected-field-independent-relaxation enhancement is not observed, possibly as a consequence of the displacement of one of the two inner-sphere water molecules of the gadolinium complex. At clinically relevant magnetic fields, however, the plasma relaxivity of B25716/1 is markedly higher than that shown by B22956/1, owing to concomitant synergistic contributions from the electronic correlation time and water molecules in the second coordination sphere. The capability of B25716/1 to enhance tumor regions in magnetic resonance images was assessed in vivo at 3 T on a xenograft tumor mouse model prepared with PC-3 cells. B25716/1 displays signal enhancements approximately double those observed for B22956/1, in agreement with the findings of the in vitro relaxivity investigations.


Assuntos
Meios de Contraste/química , Gadolínio/química , Imageamento por Ressonância Magnética/métodos , Animais , Humanos , Masculino , Camundongos , Neoplasias da Próstata/diagnóstico
3.
Benef Microbes ; 10(3): 253-263, 2019 Apr 19.
Artigo em Inglês | MEDLINE | ID: mdl-30776899

RESUMO

Supplementing kindergarten children during a cold season with a prebiotic inulin-type fructans product with shorter and longer fructan chains has been shown to reduce febrile episodes requiring medical attention and to lower the incidence of sinusitis. These beneficial effects may be connected to the specific modulation of children's gut microbiota. By applying quantitative and qualitative microbiota analysis this study aimed at characterising the gut microbiota composition and at exploring effects of prebiotic intervention on the gut microbiota during a 24-weeks intervention and during antibiotic treatment in healthy children. The study was a randomised, placebo-controlled trial with 258 healthy children aged 3 to 6 years consuming 6 g/day prebiotic inulin-type fructans or maltodextrin. During the course of the study, faecal samples were collected and subject to targeted qPCR analysis and phylogenetic profiling by multiplexed high throughput sequencing of the prokaryotic 16S rRNA gene PCR amplicons. The microbiota composition of the cohort could be clustered into three distinct constellations (enterotypes). Prebiotic intake resulted in a selective modulation of the gut microbiota composition. Relative abundance of Bifidobacterium was significantly higher in the prebiotic group (n=104) compared to control group (n=105) and this effect was found for all three enterotypes. Antibiotic administration decreased the relative abundance of Bifidobacterium in both groups. Nonetheless, children of the prebiotic group receiving antibiotic treatment displayed significantly higher levels of Bifidobacterium than children receiving the placebo control. Prebiotic supplementation induced specific changes in the gut microbiota composition of children aged 3 to 6 years. Moreover, it attenuated antibiotic-induced disturbances in the gut microbiota composition as shown by higher relative abundance of bifidobacteria at the end of the antibiotic treatment in the prebiotic group. With the previously reported benefits on immune function, the study contributes to the evidence on the immune-modulating effects of prebiotics through gut microbiota modifications. The study was registered as NCT03241355 ( https://clinicaltrials.gov/show/NCT03241355 ).


Assuntos
Microbioma Gastrointestinal/efeitos dos fármacos , Prebióticos/administração & dosagem , Antibacterianos/administração & dosagem , Bactérias/classificação , Bactérias/efeitos dos fármacos , Bactérias/genética , Bactérias/isolamento & purificação , Bifidobacterium/efeitos dos fármacos , Bifidobacterium/isolamento & purificação , Criança , Pré-Escolar , Fezes/microbiologia , Frutanos/administração & dosagem , Frutanos/farmacologia , Microbioma Gastrointestinal/genética , Humanos , Inulina/administração & dosagem , Inulina/farmacologia , Polissacarídeos/administração & dosagem , Polissacarídeos/farmacologia , RNA Ribossômico 16S/genética , Estações do Ano
4.
Anticancer Res ; 28(3B): 1951-4, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18630487

RESUMO

BACKGROUND: The treatment of pancreatic cancer is still rudimentary, even in the case of locally limited tumors, because of the high frequency of recurrence due to severe suppression of the anticancer immunity that is further amplified by surgery-induced immunosuppression, evidenced by a decline in lymphocyte numbers during the postoperative period. Previous studies in colorectal cancer demonstrated that surgery-induced lymphocytopenia may be abrogated by a brief preoperative administration of IL-2. MATERIALS AND METHODS: The study included 30 consecutive patients who were randomized to be treated by radical surgery alone as a control group or by a preoperative immunotherapy with IL-2 (12 MIU/day SC for 3 consecutive days) plus surgery. RESULTS: Mean lymphocyte numbers significantly decreased in patients treated with surgery only, whereas it significantly rose in the IL-2-treated group. After a follow-up of 36 months, both the free-from-progression period (FFPP) and the overall survival were significantly higher in patients treated with IL-2. CONCLUSION: These preliminary results suggest that a short-period preoperative immunotherapy with IL-2 is sufficient to modify host tumor interactions in operable pancreatic cancer, with a subsequent abrogation of postoperative lymphocytopenia and a prolongation of FFPP and overall survival time.


Assuntos
Interleucina-2/uso terapêutico , Neoplasias Pancreáticas/terapia , Idoso , Terapia Combinada , Intervalo Livre de Doença , Feminino , Humanos , Imunoterapia/métodos , Interleucina-2/imunologia , Masculino , Pessoa de Meia-Idade , Neoplasias Pancreáticas/imunologia , Neoplasias Pancreáticas/cirurgia , Taxa de Sobrevida
5.
J Visc Surg ; 155(4): 275-282, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-29606603

RESUMO

AIM OF THE STUDY: Current criteria for hepatic resection in patients with hepatocellular carcinoma (HCC) according to Barcellona Clinic Liver Cancer (BCLC) classification is debated. Actually, patients with multinodular or large HCC>5cm are excluded from surgical treatment following the algorithm, but several studies from referral centers showed that such patients may benefit from surgical resection in the clinical practice. The aim of this study was to compare short- and long-term outcomes after liver resection for HCC in stage 0/A or B in a middle volume center. PATIENTS AND METHODS: Patients were grouped according to BCLC classification. Postoperative mortality, morbidity, overall and disease-free survival, univariate analysis of prognostic factors on survival was analyzed. RESULTS: Among 66 surgical procedures in 64 patients included in the study, 41 were BCLC stage 0/A (62.1%) and 25 BCLC stage B (37.9%). The overall 30- and the 90-days mortality rates were 1.5% and 3%. Patients in BCLC stage B had higher transfusion rate (P=0.04) but similar morbidity and mortality compared to patients in BCLC stage 0/A. After a median follow-up of 35 months (range: 14-147), the overall survival at 1, 3 and 5 years resulted 95%, 61.1%, 46.2% for stage 0-A and 83.3%, 50%, 41.2% for stage B (P=0.73). Univariate analysis identified poorly differentiated tumors (P=0.02) and positive margin (P=0.02) as negative prognostic factors on survival. CONCLUSIONS: Surgical treatment of HCC in BCLC stage B offers similar results than the ones in BCLC stage 0/A and consequently should not be considered contraindicated for such patients.


Assuntos
Carcinoma Hepatocelular/cirurgia , Hepatectomia , Neoplasias Hepáticas/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma Hepatocelular/classificação , Carcinoma Hepatocelular/mortalidade , Carcinoma Hepatocelular/patologia , Feminino , Seguimentos , Hepatectomia/métodos , Humanos , Neoplasias Hepáticas/classificação , Neoplasias Hepáticas/mortalidade , Neoplasias Hepáticas/patologia , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Estudos Retrospectivos , Análise de Sobrevida , Resultado do Tratamento
6.
Dig Liver Dis ; 39(12): 1088-90, 2007 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-17644055

RESUMO

A 57-year-old woman presented with fever, vomiting and arthralgia, with a history of rheumatoid arthritis. Laboratory tests showed leucocytes, anaemia and elevation of C-reactive-protein (CRP). Blood cultures were positive for Gram negative bacteria and Streptococcus viridans. Patient underwent abdominal Computed Tomography (CT) scan revealing sigmoid acute diverticulitis with peridiverticular abscesses and thrombophlebitis within the inferior mesenteric and portal veins. She started antibiotic and anticoagulant therapy. After 20 days, a second CT revealed a thrombosis involving the superior mesenteric vein also. After 22 days of therapy the patient was discharged with the resolution of the septic status. Two months after discharge the patient underwent left hemicolectomy for a histopathologically documented diverticulitis with an uneventful postoperative course. This is a description of a rare association of septic thrombosis within the portal, inferior mesenteric and superior mesenteric veins during acute sigmoid diverticulitis with abdominal abscesses. Our therapeutic strategy was a first line medical approach and delayed surgery.


Assuntos
Doença Diverticular do Colo/patologia , Oclusão Vascular Mesentérica/patologia , Veias Mesentéricas/patologia , Veia Porta/patologia , Doenças do Colo Sigmoide/patologia , Tromboflebite/patologia , Antibacterianos/uso terapêutico , Anticoagulantes/uso terapêutico , Colectomia , Terapia Combinada , Doença Diverticular do Colo/complicações , Doença Diverticular do Colo/terapia , Quimioterapia Combinada , Transfusão de Eritrócitos , Feminino , Humanos , Oclusão Vascular Mesentérica/etiologia , Oclusão Vascular Mesentérica/terapia , Pessoa de Meia-Idade , Doenças do Colo Sigmoide/complicações , Doenças do Colo Sigmoide/terapia , Tromboflebite/etiologia , Tromboflebite/terapia , Resultado do Tratamento
8.
Surg Endosc ; 20(6): 991-4, 2006 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-16738999

RESUMO

BACKGROUND: Bleeding is the main complication and cause of conversion during laparoscopic splenectomy (LS). We present the advantages of the LigaSure vessel sealing system added to the lateral approach for achieving safe vascular control. METHODS: We performed 63 consecutive LS in a 3-year period using LigaSure in two affiliated university hospitals. We employed a right semilateral position technique with dissection of the spleen and vessel sealing using LigaSure. Forty-two patients had benign hematological disease, 19 had malignant disease, and two had splenic cysts. RESULTS: A total of 58 LS were completed with five conversions due to hilar bleeding (three cases), difficult dissection (one), and massive splenomegaly (one). In all but five patients, blood loss was less than 100 ml. No transfusions were needed. There were five postoperative complications: portal thrombosis (one case), hemoperitoneum (two), surgical wound infection (one), and pleural effusion (one). CONCLUSIONS: The use of LigaSure, and the semilateral position, results in a gain of time and safety. Furthermore, average intraoperative bleeding is very low.


Assuntos
Hemostasia Cirúrgica/métodos , Laparoscopia , Esplenectomia/métodos , Adolescente , Adulto , Idoso , Perda Sanguínea Cirúrgica , Criança , Feminino , Hemoperitônio/etiologia , Humanos , Laparoscopia/efeitos adversos , Masculino , Pessoa de Meia-Idade , Derrame Pleural/etiologia , Veia Porta , Complicações Pós-Operatórias , Infecção da Ferida Cirúrgica/etiologia , Suturas , Resultado do Tratamento , Trombose Venosa/etiologia
9.
Minerva Ginecol ; 58(3): 239-44, 2006 Jun.
Artigo em Inglês, Italiano | MEDLINE | ID: mdl-16783296

RESUMO

AIM: Intestinal obstruction is a frequent event in patients affected by ovarian carcinoma. Little data on repeat palliative surgery for recurrent bowel obstruction are available. The aim of this study was to analyze postoperative and long term outcomes of ovarian cancer patients who underwent reoperation for recurrent intestinal obstruction. METHODS: We retrospectively evaluated the records of these patients treated at our Department between 1992 and 2002. RESULTS: Nine women with a mean age of 56 years (range 37-72) were identified. All patients had undergone previous abdominal surgery for bowel obstruction from ovarian cancer. All patients underwent exploratory laparotomy. In 4 patients (Group A) because of advanced disease, only exploratory surgery was carried out. A surgical correction was achieved in the other 5 patients (Group B), but only 3 patients had a successful palliation, defined as the ability to tolerate an oral intake for at least 60 days postoperatively. Postoperative mortality was nil, morbidity was 44.4%; particularly 2 patients developed an enterocutaneous fistula. Mean survival of Group A and B patients were 36.7 and 96.2 days respectively. The 3 successful palliated patients died of disease after 3.5, 4 and 5 months, in 2 cases for recurrent bowel obstruction. CONCLUSIONS: Repeat surgery for recurrent bowel obstruction in advanced ovarian carcinoma may achieve successful palliation in few cases and is associated with high postoperative morbidity and limited survival. In these patients non surgical approaches based on medical treatment, percutaneous endoscopic gastrostomy and stent placement should be considered.


Assuntos
Procedimentos Cirúrgicos do Sistema Digestório/métodos , Obstrução Intestinal/epidemiologia , Obstrução Intestinal/cirurgia , Neoplasias Ovarianas/epidemiologia , Cuidados Paliativos/métodos , Adulto , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Recidiva
10.
Mol Imaging Biol ; 17(6): 819-28, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25875866

RESUMO

PURPOSE: A magnetic resonance imaging contrast agent based on a tetrameric Gd-DTPA-like system linked to a fibrin-targeting peptide (Gd-F) has been designed for in vivo tumor characterization. PROCEDURES: Gd-F was synthesized following Fmoc-SPPS strategy. Binding was measured using soluble fibrin DD(E) fragment and a dried fibrin assay. Contrast efficiency was tested on human and mouse clots and in vivo on Neuro2A tumor model. An anti-thrombotic drug was used to evaluate Gd-F sensitivity for changes in fibrin availability at the tumor site. RESULTS: The high relaxivity of Gd-F (42 mM(-1) s(-1), per molecule) yielded a strong signal enhancement in human and murine clots. High contrast was also measured in vivo in Neuro2A tumors, with a persistent enhancement in tumor rim and stroma. Upon treatment with an anti-thrombotic drug, the contrast uptake was significantly reduced in the tumor area confirming the specificity of the probe. CONCLUSIONS: Gd-F resulted to be an efficient probe for tumor delineation and for monitoring fibrin deposits during tumor progression and anti-thrombotic therapy.


Assuntos
Fibrina/metabolismo , Gadolínio/administração & dosagem , Imageamento por Ressonância Magnética/métodos , Neuroblastoma/patologia , Peptídeos/administração & dosagem , Animais , Humanos , Camundongos , Neuroblastoma/metabolismo
11.
Eur J Cancer ; 27(7): 893-6, 1991.
Artigo em Inglês | MEDLINE | ID: mdl-1834123

RESUMO

The aim of the present study was to provide information on the DNA content in colorectal tumours using densitometric techniques on histological samples and correlating the findings with age, sex, histological grade, stage, presence or absence of lymph-node metastasis and survival time. The distribution of DNA values was significantly related with the histological grade. Dukes' stage and infiltration of the peritumoral lymph-nodes. The distribution of DNA values was not significantly correlated with age and sex. From the data obtained in this study it can be concluded that evaluation of DNA content in colorectal adenocarcinoma can be used as a prognostic test that is complementary to histological investigation. The ploidy can provide information for classifying the degree of malignancy and can also be used to determine which tumours are biologically most aggressive.


Assuntos
Adenocarcinoma/genética , Neoplasias do Colo/genética , DNA de Neoplasias/análise , Metástase Linfática/genética , Neoplasias Retais/genética , Adenocarcinoma/mortalidade , Adenocarcinoma/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Colo/patologia , Neoplasias do Colo/mortalidade , Neoplasias do Colo/patologia , Densitometria , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Neoplasias Retais/mortalidade , Neoplasias Retais/patologia , Reto/patologia
12.
Oncol Rep ; 6(6): 1205-7, 1999.
Artigo em Inglês | MEDLINE | ID: mdl-10523681

RESUMO

This study evaluates retrospectively the outcome of 20 colorectal cancer patients radically operated (M/F 13/7; primary/recurrent 15/5; Dukes B=11; C=6; D=3) who received pre-operative IL-2 (18,000, 000 IU/daily s.c. for 3 days) and the outcome of 40 colorectal cancer (primary/recurrent 40/0) patients age, sex and stage-matched radically operated, as control group. After a median follow-up of 72 months, in the IL-2 pre-operative group we observed 6/20 recurrences (30%) vs. 19/40 (47.5%) in controls. Mean and median disease-free period in patients who relapsed were respectively 21 months and 20.5 months (range 6-36) in IL-2 group vs. 14.1 and 12 months in the control group (range 3-34). After a 5-year follow-up, 4/20 (20%) IL-2 treated patients were dead vs. 19/40 control patients (47.5%) (log-rank chi2=3.7, p=0.05). Pre-operative IL-2 administration is safe, active in preventing post-operative lymphocytopenia and seems to improve the clinical outcome in radically operated colorectal cancer patients.


Assuntos
Neoplasias Colorretais/tratamento farmacológico , Interleucina-2/administração & dosagem , Adulto , Idoso , Neoplasias Colorretais/imunologia , Neoplasias Colorretais/patologia , Neoplasias Colorretais/cirurgia , Feminino , Seguimentos , Humanos , Imunoterapia , Injeções Subcutâneas , Masculino , Pessoa de Meia-Idade , Proteínas Recombinantes/administração & dosagem , Estudos Retrospectivos , Prevenção Secundária , Resultado do Tratamento
13.
Eur J Surg Oncol ; 27(3): 225-8, 2001 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-11373097

RESUMO

Gallbladder cancer is a relatively uncommon malignancy. Its presentation is similar to that of gallstone disease and sometimes with non-specific symptoms. Laparoscopic cholecystectomy has become the method of choice for removing the gallbladder in most benign conditions. Occasionally, unsuspected gallbladder carcinoma is encountered in association with laparoscopic cholecystectomy. Overall gallbladder cancers have a poor prognosis, despite surgery or adjuvant therapies. However, in selected cases, a favourable outcome can be expected and the less favourable predicted outcome can be improved. Management of patients with gallbladder cancer in different situations is discussed: gallbladder cancer noted post-operatively on final pathology, gallbladder cancer noted after removal of the gallbladder and opening of the specimen at the time of surgery, difficulty encountered at the time of dissection and resultant suspicion of gallbladder cancer, and diagnosis of extensive disease at initial placement of the laparoscope.


Assuntos
Colecistectomia Laparoscópica/métodos , Colelitíase/patologia , Colelitíase/cirurgia , Neoplasias da Vesícula Biliar/patologia , Neoplasias da Vesícula Biliar/cirurgia , Diagnóstico Diferencial , Feminino , Neoplasias da Vesícula Biliar/epidemiologia , Humanos , Incidência , Masculino , Estadiamento de Neoplasias , Prognóstico , Fatores de Risco , Taxa de Sobrevida
14.
Am J Surg ; 143(3): 310-4, 1982 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-7065352

RESUMO

A technique of posterior percutaneous liver biopsy and cholangiography was used in 500 liver biopsies and 121 cholangiographic examinations of the biliary tract. It provided a successful liver biopsy in 98.6 percent of cases and was associated with a less than 2 percent complication rate. Successful cholangiography was possible in all patients with dilated ducts and in 87 percent of patients with normal undilated ducts. Percutaneous cholangiography was associated with a 5 percent complication rate. The advantages of this technique are that it can be performed by relatively inexperienced physicians with minimal risk of hemo- or choleperitoneum. It has a low failure rate and can be performed in obese patients or patients with coagulation defects. The route of entry eliminates the risk of injury to the gallbladder or colon. Due to the posterior position, this technique can be used in relatively uncooperative patients.


Assuntos
Biópsia por Agulha/métodos , Colangiografia/métodos , Fígado/patologia , Doenças Biliares/diagnóstico , Biópsia por Agulha/efeitos adversos , Colangiografia/efeitos adversos , Humanos , Hepatopatias/diagnóstico
15.
J Biol Regul Homeost Agents ; 14(3): 200-3, 2000.
Artigo em Inglês | MEDLINE | ID: mdl-11037053

RESUMO

Surgery-induced immunosuppression is characterized by a decline in lymphocyte count, particularly T lymphocyte number. In addition, preliminary studies have shown that the postoperative period is also characterized by a decline in the number of circulating dendritic cells (DC), whose fundamental anticancer role has been recently demonstrated. Previous studies had already shown that the preoperative injection of IL-2 may completely abrogate surgery-induced lymphocytopenia, whereas its eventual influence on DC system during the perioperative period is still unknown. The present study was performed to evaluate the influence of IL-2 preoperative immunotherapy on the perioperative changes in circulating DC number in patients affected by colorectal cancer. The study included 14 consecutive patients, who were randomized to be treated with or without IL-2 presurgical immunotherapy (12 million IU/day for 3 days subcutaneously). Circulating immature and mature cells were evaluated before surgery and at days 3 and 7 of the postoperative period. The detection was made by FACS using monoclonal antibodies against CD123 and CD11c to recognize immature and mature DC, respectively. Surgery induced a significant decline in the mean number of both immature and mature DC. The pre-surgical administration of IL-2 completely abrogated surgery-induced decline in immature DC cell amount. Moreover, mature DC mean number was diminished only at day 3 of the postoperative period, since the value observed at day 7 was not significantly lower than that found before surgery. This preliminary study shows that surgery-induced immunosuppression is characterized also by a significant decline in the mean number of both immature and mature DC. Moreover, this study would suggest that the preoperative immunotherapy with IL-2 may counteract surgery-induced failure of DC system. Because of the fundamental antitumor role of DC, this evidence could have a prognostic impact on the clinical course of the neoplastic disease.


Assuntos
Neoplasias Colorretais/cirurgia , Células Dendríticas/efeitos dos fármacos , Interleucina-2/uso terapêutico , Linfopenia/prevenção & controle , Complicações Pós-Operatórias/prevenção & controle , Idoso , Antígenos CD11/sangue , Antígenos CD11/efeitos dos fármacos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Cuidados Pré-Operatórios
16.
Surg Endosc ; 16(11): 1608-11, 2002 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11984666

RESUMO

BACKGROUND: Intraoperative bleeding is the main complication and main cause of conversion during laparoscopic splenectomy (LS). We present the advantages of the use of the Ligasure Vessel Sealing System added to lateral approach for achieving a safe vascular control. METHODS: Ligasure is an energy-based device which works applying a precise amount of bipolar energy and pressure to the tissue, achieving a permanent seal. We have performed a total of 35 LS in a 5-year period using different approaches and methods of dissection, including the anterior approach, monopolar coagulation, clips, endostaplers, and ultrasonic shears. In the last 10 patients (4 males and 6 females, mean age 24 yr) we employed a technique with 4 trocars, right semilateral position associated with the entire dissection of the spleen and vessels sealing (lower pole vessels, main vascular pedicles, short gastric vessels) performed with Ligasure. Six had thrombocytopenic idiopatic purpura (ITP), 2 hereditary spherocytosis and one each b-thalassemia and hemolytic anemia. RESULTS: Nine LS were completed with one (10%) conversion because of hilar bleeding due to accidental injury with Ligasure. The average splenic weight was 485 g (range 265-1800), with an average diameter of 16 cm (range 12-25). In all but one patients (the converted one) the intraoperative blood loss was less than 100 mL (range 50-100 mL, average 80 mL). No blood transfusion were needed. The average operative time was 120 min (range 90-165), including 2 patients undergoing combined laparoscopic cholecystectomy. There was no mortality, with one (10%) postoperative complication (thrombosis of the spleno-portal axis), treated with a conservative approach. The average postoperative hospital stay was 3.5 days (range 3-6). CONCLUSIONS: The use of Ligasure, associated with the lateral position, results in a gain of time and safety. Furthermore, the average intraoperative bleeding of this series is very low.


Assuntos
Hemostasia Cirúrgica/métodos , Laparoscopia/métodos , Esplenectomia/métodos , Adulto , Anemia Hemolítica/cirurgia , Feminino , Humanos , Complicações Intraoperatórias/epidemiologia , Ligadura/métodos , Masculino , Púrpura Trombocitopênica Idiopática/cirurgia , Esferocitose Hereditária/cirurgia , Fatores de Tempo , Ultrassom , Talassemia beta/cirurgia
17.
Eur J Radiol ; 18 Suppl 1: S1-12, 1994 May.
Artigo em Inglês | MEDLINE | ID: mdl-8020510

RESUMO

The synthesis and the chemical characterization of iomeprol, a new triiodinated nonionic radiographic contrast agent, are reported. The physico-chemical properties both of aqueous solutions of the pure compound and of its pharmaceutical formulations are presented and these last data are compared with those of other contrast media. The pharmaceutical development of the product is described. Iomeprol is obtained via a synthesis which is particularly friendly to the environment. The compound shows an unusually high solubility which allows the formulation of contrast media with the lowest osmolalities and viscosities as compared with corresponding contrast media of the same category. In view of these favourable characteristics and of the remarkably high stability of its solutions, iomeprol for injection is formulated also at 400 mgI/ml, the highest concentration so far available on the market for non-ionic contrast media.


Assuntos
Meios de Contraste/química , Iopamidol/análogos & derivados , Anilidas/química , Benzamidas/química , Fenômenos Químicos , Precipitação Química , Química Farmacêutica , Físico-Química , Cromatografia Líquida de Alta Pressão , Cromatografia em Camada Fina , Meios de Contraste/síntese química , Meios de Contraste/efeitos da radiação , Ácido Edético/química , Concentração de Íons de Hidrogênio , Hidrólise , Iodetos/química , Iopamidol/síntese química , Iopamidol/química , Iopamidol/efeitos da radiação , Espectroscopia de Ressonância Magnética , Concentração Osmolar , Radiação , Refratometria , Reologia , Solubilidade , Soluções , Estereoisomerismo , Viscosidade , Água , Raios X
18.
J Exp Clin Cancer Res ; 22(2): 179-83, 2003 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-12866567

RESUMO

Cell-mediated immunodeficiency is known to occur in advanced cancer patients, but it is less characterized in earlier stages. Pre-existing immunodeficiency may impair the recovery of postoperative lymphocytopenia, occurring generally within 8-14 days after surgical stress. This study was aimed to verify whether immunodeficiency exists in patients with operable gastric adenocarcinoma and whether radical surgery may restore a count of peripheral blood T helper cells (CD4) and CD4/CD8 ratio within physiological normal values in the late postoperative period. Thirty-five consecutive patients (M/F 18/17; mean age 67 years, range 42-82) with histologically proven gastric adenocarcinoma, undergoing surgery with radical intent, were studied. Assessment of total lymphocyte count and lymphocyte subsets was performed by FAC scan at baseline, then postoperatively 14 and 50 days after surgery. Normal reference values were according to CDC criteria for HIV immunodeficiency (total lymphocyte > 1500/mmc; CD4 cells > 500/mmc; CD4/CD8 > 1.2). Surgical interventions, including D2 locoregional lymphadenectomy, were as follows: 19 Roux Y total gastrectomies; 3 Roux Y subtotal gastrectomies and 13 Billroth II subtotal gastrectomies. Pathological nodal staging was pN0 in 18 and pN+ in 17 cases. Hystotype was intestinal in 14 patients, diffuse in 14 and unclassifiable in 7. Grading was G1 n = 7; G2 n = 7; G3 n = 21. Lymphocyte immunodeficiency was found at baseline in 41% of patients and at 14 days after surgery in 67% of patients. Recovery of postoperative surgery-induced lymphocytopenia occurred on the 50th day only in those patients with normal values at baseline (59%). CD4 deficiency was significantly more frequent in pN+ vs. pN0 patients, either at baseline (p < 0.001 ), on the 14th day (p < 0.02) and on the 50th day (p < 0.007) postoperatively. Cancer-related CD4 deficiency was a frequent finding in our consecutive series of gastric cancer patients; this systemic immune impairment was not restored after complete tumor removal, even in late postoperative period (50th day ). Further studies on a larger number of cases may confirm the prognostic value of lymphocyte count in early gastric cancer stages, and to verify whether early and late postoperative immunodeficiency may be prevented by IL-2 administration.


Assuntos
Síndromes de Imunodeficiência/terapia , Neoplasias Gástricas/imunologia , Neoplasias Gástricas/cirurgia , Adenocarcinoma/imunologia , Adenocarcinoma/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Linfócitos T CD4-Positivos/metabolismo , Linfócitos T CD8-Positivos/metabolismo , Separação Celular , Feminino , Citometria de Fluxo , Humanos , Interleucina-2/metabolismo , Linfócitos/metabolismo , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias , Prognóstico , Estudos Prospectivos , Fatores de Tempo
19.
J Exp Clin Cancer Res ; 23(2): 195-200, 2004 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-15354402

RESUMO

Cell-mediated immunodeficiency, with Total and T lymphocytes count decrease, is well established in cancer patients and it predicts a poor prognosis and poor survival rates. Furthermore, major surgery induces a transient immunodeficiency, too. Nevertheless, cell-mediated immunity in pancreatic cancer, which has a very poor prognosis, has not been completely outlined. Aim of this study is to evaluate the cell-mediated IL-2 dependent immune status in operable pancreatic cancer patients and to compare it with other gastrointestinal tumors. One hundred and twenty-one cancer patients (22 pancreatic, 48 gastric and 51 colorectal), with a median age of 66 years (range 42-83), 55 males and 66 females, were enrolled. Total lymphocyte count and lymphocytes subset (T helper count - CD4+) were assessed preoperatively and on the 14th and 50th postoperative day. Results obtained were compared between the groups and related to nodal involvement (N0 versus N+). Colorectal and gastric cancer patients showed quantitative lymphocyte deficiency at baseline in 29% and 41% of cases, respectively. Fourteen days after surgery values below normal range were found in 44% and 54% (Total) and 53% and 67% (T helper), respectively. Recovery of postoperative surgery-related lymphocytopenia occurred late only in patients with normal count at baseline. According to regional nodal involvement (pN0/N+) T helper deficiency was significantly more frequent in patients with nodal involvement than in patients without. In pancreatic cancer, percentage of immunodepressed patients at baseline was higher compared to the other two groups (71%). Lymphocyte count was significantly different between pancreatic and gastric/colorectal cancer, reaching a statistical significance at baseline and on the 14th and 50th postoperative day. No differences of T helper deficiency were noted according to nodal involvement (N0 versus N+) neither at baseline nor in the postoperative period. In conclusion, the degree of immunosuppression varies among different tumor types: since initial stages of disease, immunodepression was significantly greater in pancreatic cancer which should be considered always a systemic disease even in early stages and indipendently from the nodal involvement and from tumor load.


Assuntos
Adenocarcinoma/imunologia , Neoplasias Gastrointestinais/imunologia , Síndromes de Imunodeficiência/imunologia , Neoplasias Pancreáticas/imunologia , Adenocarcinoma/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Linfócitos T CD4-Positivos/metabolismo , Feminino , Neoplasias Gastrointestinais/cirurgia , Humanos , Imunidade Celular , Interleucina-2/farmacologia , Linfonodos/imunologia , Linfonodos/patologia , Contagem de Linfócitos , Masculino , Pessoa de Meia-Idade , Neoplasias Pancreáticas/cirurgia , Complicações Pós-Operatórias , Estudos Prospectivos
20.
Tumori ; 87(4): 272-5, 2001.
Artigo em Inglês | MEDLINE | ID: mdl-11693808

RESUMO

Meckel's diverticulum is an uncommon gastrointestinal congenital anomaly that occurs in 1-3% of the population. It is sometimes associated with complications related to the presence of ectopic tissue (obstruction, ulceration, hemmorhage, inflammation, perforation, fistula and tumors). Neoplastic degeneration of Meckel's diverticulum mucosa is rare, developing in only 1-5% of all diverticula, usually asymptomatic and occasionally discovered. Disease is metastatic, usually to the liver, in 25% of cases. We report a case of asymptomatic unsuspected carcinoid of Meckel's diverticulum with ileal, hepatic and mesenteric metastasis discovered during a gastrectomy performed for gastric adenocarcinoma. The patient underwent ileal and Meckel diverticulum resection, excision of mesenterial metastasis and liver bisegmentectomy. Furthermore, total gastrectomy with esophago-jejunal anastomosis was performed. After an 18-month follow-up period, the patient is alive and disease free. Owing to possible neoplastic degeneration, Meckel's diverticulum should be resected when occasionally discovered. In the presence of a carcinoid tumor, even if associated with metastatic disease, extended resection is recommended.


Assuntos
Adenocarcinoma/complicações , Divertículo Ileal/complicações , Neoplasias Gástricas/complicações , Adenocarcinoma/patologia , Adenocarcinoma/cirurgia , Idoso , Humanos , Masculino , Divertículo Ileal/patologia , Divertículo Ileal/cirurgia , Neoplasias Gástricas/patologia , Neoplasias Gástricas/cirurgia
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