Juvenal Ricardo Navarro Góes

University of Campinas, Campinas, Estado de Sao Paulo, Brazil

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Publications (44)22.47 Total impact

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    ABSTRACT: This is the first Brazilian Consensus on inflammatory bowel disease, carried out by the Brazilian Study Group of Inflammatory Bowel Disease, and discusses the treatment of Crohn's disease and ulcerative colitis in acute and remission phases. The first part of the text, brings out a review on the main drugs used in the treatment of inflammatory bowel disease, as well as their mechanisms of action and cautions during their use. In the second part, the committee's opinions about the most recommended medical and surgical approaches for both diseases are presented on the basis of disease activity, location and behaviour status. The recommendations here presented were widely discussed in several scientific meetings with active participation of all members of the group and were highly based on scientific evidence covered by the literature.
    Arquivos de Gastroenterologia 07/2010; 47(3):313.
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    ABSTRACT: Total rectocolectomy and ileal pouch-anal anastomosis is the choice surgical procedure for patients with ulcerative colitis. In cases of Crohn's disease post-operative diagnosis, it can be followed by pouch failure. To evaluate ileal pouch-anal anastomosis long-term outcome in patients with Crohn's disease. Between February 1983 and March 2007, 151 patients were submitted to ileal pouch-anal anastomosis by Campinas State University Colorectal Unit, Campinas, SP, Brazil, 76 had pre-operative ulcerative colitis diagnosis and 11 had post-operative Crohn's disease diagnosis. Crohn's disease diagnosis was made by histopathological biopsies in nine cases, being one in surgical specimen, two cases in rectal stump, small bowel in two cases, ileal pouch in three and in perianal abscess in one of them. The median age was 30.6 years and eight (72.7%) were female. All patients had previous ulcerative colitis diagnosis and in five cases emergency colectomy was done by toxic megacolon. The mean time until of Crohn's disease diagnosis was 30.6 (6-80) months after ileal pouch-anal anastomosis. Ileostomy closure was possible in 10 cases except in one that had ileal pouch fistula, perianal disease and small bowel involvement. In the long-term follow-up, three patients had perineal fistulas and one had also a pouch-vaginal fistula. All of them were submitted to a new ileostomy and one had the pouch excised. Another patient presented pouch-vaginal fistula which was successfully treated by mucosal flap. Three patients had small bowel involvement and three others, pouch involvement. All improved with medical treatment. Presently, the mean follow-up is 76.5 months and all patients are in clinical remission, and four have fecal diversion. The remaining patients have good functional results with 6-10 bowel movements/day. Crohn's disease diagnosis after ileal pouch-anal anastomosis for ulcerative colitis may be usual and later complications such fistulas and stenosis are common. However, when left in situ ileal pouch is associated with good function.
    Arquivos de gastroenterologia 09/2008; 45(3):204-7.
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    ABSTRACT: Restorative proctocolectomy is the procedure of choice to treat familial adenomatous polyposis, however it can be associated to short-term and long-term postoperative complications. To evaluate the occurrence of complications related to the surgical treatment of familial adenomatous polyposis with ileal pouch technique. Retrospective study of 69 patients with familial adenomatous polyposis after rectocolectomy with ileal reservoir between 1984 and 2006, operated on Coloproctology Group, Medical Sciences Faculty, State University of Campinas, Campinas, SP, Brazil. The median follow-up period was 82 (2-280) months. Data obtained were surgical techniques and postoperative complications. The morbidity and mortality were 63.8% and 2.9%, respectively. The most frequent complications were small-bowel obstruction (17.4%), anastomotic stricture (15.9%) and pelvic sepsis (10.1%). Acute ischemia of the ileal pouch (4.3%), pouchitis (2.9%) and ileal pouch-related fistula (2.9%) had poorer frequency than others. The morbid-mortality was similar to the literatures data and it is acceptable for a complex surgery in two terms like the ileal reservoir-anal anastomosis. The small-bowel obstruction was the most frequent complication. However, ischemia of the reservoir, pouchitis and pelvic sepsis were important complications and was related to the failure of the ileal reservoir.
    Arquivos de Gastroenterologia 06/2008; 45(2):106-10.
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    ABSTRACT: To evaluate the effect of hemorrhagic shock in colonic anastomoses in rats, with a rupture by liquid distension resistance test. Wistar lineage rats, averaging 90 days old and weighing from 310 to 380 grams were divided into two groups. In the first group (G1), 10 animals were submitted to colonic anastomoses in normovolemic terms and the second group (G2), of 10 animals, was submitted to colonic anastomoses in hypovolemic conditions. The shock was caused by half milliliter of blood withdrawn, every two minutes, until the value of average 50 mmHg arterial pressure or a total volume corresponding 30% withdrawal of volemia was reached. Serum lactate dosages were carried out at the beginning and end of the procedure. The average serum lactate values at the end of the surgery were 1.91 mmol/l in G1 group and 3.69 mmol/l in G2 group (p<0.05). On the fifth postoperative day, the animals were euthanized. The anastomoses were evaluated with a rupture by liquid distension resistance test. In G1, the average value of colonic rupture was 160.7 mmHg whereas in G2 it was 152.1 mmHg (p>0.05). Hemorrhagic shock, under the established conditions of this study, had no influence on colonic anastomoses in rats evaluated with the rupture by liquid distention resistance test.
    Acta Cirurgica Brasileira 06/2008; 23(3):237-42. · 0.63 Impact Factor
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    ABSTRACT: Pouchitis after total rectocolectomy is among the most common complications of patients with ulcerative colitis (UC). However, its frequency is quite rare in patients with familial adenomatous polyposis (FAP). We evaluated the inflammatory and pro-apoptotic activity in endoscopically normal mucosa of the ileal pouch in patients with UC and FAP. Twenty patients (10 with UC and 10 with FAP) with "J" pouch after total proctocolectomy were studied as were 10 normal controls. Biopsies were obtained from the mucosa of the pouch of UC and FAP patients and from the normal ileum of controls. The expression levels of TNF-alpha, IL-1beta, IL-6, IL-8 and phospho-BAD were determined by immunoblotting. Activated NFkappaB was evaluated by immuno-precipitation and immunoblotting for IkappaB kinase beta. Patients with UC had higher levels of IL-1beta, IL-6, IL-8 and TNF-alpha than patients with FAP. The level of TNF-alpha was higher in patients with UC than in patients with FAP; both patient groups had TNF-alpha levels higher than controls. Activation of NFkappaB was similar in all three groups. The expression of phospho-BAD was significantly lower in patients with FAP than in patients with UC. As compared with patients with FAP, patients with UC presented increased levels of some pro-inflammatory cytokines, even in the absence of clinical or endoscopic signs of pouchitis. Patients with FAP presented lower levels of pro-inflammatory proteins and of phospho-BAD. These findings may explain the higher rates of progression to pouchitis in UC patients, which could correlate with mucosal atrophy that occurs in inflamed tissue.
    Techniques in Coloproctology 04/2008; 12(1):33-8. · 1.54 Impact Factor
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    ABSTRACT: Local recurrence after rectal cancer resection varies between 3 to 35% in five years. The condition has difficult management, and little is known about the best treatment. Radiotherapy and chemotherapy can be used as paliative methods, and the best results are achieved with radical resection. PURPOSE: To evaluate patients submitted to surgery for pelvic recurrence by the Coloproctology Unit at Clinical Hospital of Unicamp. METHODS AND PATIENTS: Between 1999 and 2007, 26 consecutive patients with locally recurrence after rectal cancer surgery were evaluated. According to clinical data, tumor stage at the first surgery, recurrence ressecability and follow-up were analyzed. RESULTS: The most common initial surgery was retossigmoidectomy with colorectal anastomosis (46,1%). Of the 26 patients, five had tumor perforation at the first surgery. Positive lynphnodes were found in 53,8% and 69,2% were classified as T3 or T4 staging. In relation to surgery for local recurrence, the principle was abdominoperineal amputation of the rectum. Radical surgery was performed in 42,3% of the cases. The resection of the tumor was possible in 65,4%. The mean follow-up period was 29,4 months, with an overall survival of 34,6%. CONCLUSION: Approximately two-thirds of patients with locally recurrent rectal cancer can be submitted for surgical resection, improving survival. This surgical intervention should be encouraged in hospitals with multidisciplinary teams to improve quality of life in selected patients.
    Revista Brasileira de Coloproctologia 03/2008; 28(1):40-45.
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    ABSTRACT: In developing countries, low budgets make the issue of integrating genetics into clinical practice a challenge, a situation in which the use of family history (FH) becomes important for patient care, as it is a low cost strategy and a risk assessment tool. The purpose of this study was to review medical records of patients with colorectal cancer (CRC) seen in a public University Hospital and evaluate how often FH of cancer is registered. Initially we searched a database for patients who were seen in our hospital between 2002 and 2004 with the diagnosis of CRC. We found 415 patients, 104 of whom were excluded. A total of 311 charts were reviewed and classified into 3 groups. Group A: no FH documented; group B: FH was documented, but FH of cancer was not collected; and group C: FH of cancer was documented. We also investigated what type of information was recorded, in order to verify if important elements were assessed. Ninety-eight charts (31.5%) were classified in group A, 20 (6.5%) in group B, and 193 (62%) in group C. In addition, we observed that important information regarding affected relatives was not collected in most of the charts. In conclusion, we found that although FH of cancer was recorded in 62% of charts of patients with CRC, information that could be relevant for risk assessment and management of at-risk families was missing. Our findings expose an important problem in health education that could reflect negatively in the quality of medical assistance to individuals at risk for familial cancer.
    Familial Cancer 02/2008; 7(3):229-32. · 1.94 Impact Factor
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    Revista Brasileira de Coloproctologia 01/2008; 28(1).
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    ABSTRACT: Chronic perianal fistulas are a common clinical condition. However, their evolution into adenocarcinoma is rare. We report the case of a 68-year-old man with perineal and perianal chronic fistulas, who developed a perineal mass that extended proximally as a pararectal tumor. Diagnosis was confirmed by magnetic resonance imaging (MRI). Histopathological sections indicated extramucosal mucinous adenocarcinoma. No intestinal lesion was seen at endoscopic examination. The patient underwent abdominal perineal excision of the rectum without neoadjuvant or adjuvant therapy, and had a good postoperative outcome.
    Techniques in Coloproctology 07/2007; 11(2):155-7. · 1.54 Impact Factor
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    ABSTRACT: Evidence is accumulating for a role of folate in the aetiology of colorectal cancer (CRC). The methylenetetrahydrofolate reductase (MTHFR) gene, involved in folate metabolism, is polymorphic in humans. Since it is unknown whether the MTHFR C677T and A1298C polymorphisms alter the risk for CRC, this was the aim of our study. Genomic DNA from 102 sporadic colorectal adenocarcinoma (SCA) patients and 300 controls was analyzed by polymerase chain reaction followed by restriction digestion for the polymorphisms analyses. The frequencies of MTHFR C677T and A1298C genotypes were similar in patients and controls. Similar overall risks for disease were seen in individuals with the distinct MTHFR genotypes. However, an excess of the MTHFR 677TT and 677CT genotypes was seen in patients under 50 years, compared with patients at an older age (19.2 vs 13.1% and 61.6 vs 39.5%, respectively; P = 0.04). The differences were more prominent when the frequency of the 677TT plus 677CT genotype was seen in both group of patients (80.8 vs 52.6%, respectively; P = 0.01), and in younger patients compared to controls (80.8 vs 52.3%, P < 0.01). Individuals with the combined genotype had 3.82-fold (95% confidence interval, 1.41-10.42) increased risk of developing SCA under 50 years, compared with those harboring the wild-type genotype. These results suggest a role for the MTHFR 677TT plus 677CT genotype in increasing SCA diagnosed at a low age in southeastern Brazil, but additional studies with larger sample sizes should be carried out to clarify this issue.
    International Journal of Colorectal Disease 07/2007; 22(7):757-63. · 2.24 Impact Factor
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    ABSTRACT: Eosinophils have been identified in tissues from patients with Crohn's disease (CD) and ulcerative colitis (UC) but whether they contribute to IBD pathogenesis is unknown. This study aimed to investigate the functional activity and morphological aspects of peripheral-blood eosinophils from IBD patients compared to those from healthy volunteers (HVs). Eosinophils from HVs and CD and UC patients were purified using a Percoll gradient and then a immunomagnetic cell separator. Functional activity in inactivated and previously activated cells was investigated by measuring adhesion to fibronectin and chemotaxis to fMLP, and degranulation was measured by release of eosinophil peroxidase (EPO). Cell morphology was investigated using electron microscopy. Eosinophil adhesion to human fibronectin in both inactivated and PAF-stimulated and PMA-stimulated eosinophils was markedly higher in patients with CD than in either patients with UC or HVs. Similarly, the chemotactic response was markedly higher in eosinophils isolated from CD patients than in those isolated from UC patients or HVs. Baseline EPO release was higher in eosinophils isolated from UC patients than in those isolated from HVs or CD patients. Stimulation with fMLP or PMA did not further increase EPO release in cells from UC or CD patients. Comparable expression of MAC- 1 and VLA-4 adhesion molecules was observed on the surfaces of eosinophils from all groups, and an greater number of granules was noted in the eosinophils from UC patients than in those from CD patients. Our results indicate that peripheral-blood eosinophils are potentially primed and activated in IBD patients. Whether the differences in the morphology and functional responses of eosinophil from UC and CD patients reflect differences in disease phenotype remains to be elucidated.
    Inflammatory Bowel Diseases 03/2007; 13(2):211-8. · 5.12 Impact Factor
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    ABSTRACT: The extra colonic manifestations, like upper gastrointestinal tract polyps and duodenal cancer are disorders that affect long-term morbidity and mortality of patients with familial adenomatous polyposis, after rectocolectomy. To describe the frequency of those disorders in patients with familial adenomatous polyposis and to review efficacy of upper gastrointestinal endoscopic surveillance. Between 1984 and 2005, 62 patients with familial adenomatous polyposis after rectocolectomy, were studied retrospectively, by Coloproctology Group, Medical Sciences Faculty, State University of Campinas, SP, Brazil. It was possible to analyze 53 patients (85,5%) in this study. Twenty seven (50,9%) of 53 patients in follow-up had upper gastrointestinal polyps. Eight (15,4%) had gastric adenomatous polyps, 14 (27%), duodenal polyps and 5 (9,6%) duodenal and gastric polyps. Two patients (3,8%) had adenomatous duodenal polyps with severe dysplasia, and one (1,9%) had adenocarcinoma of the duodenal papilla. The upper gastrointestinal endoscopic surveillance has importance and the aim is to detect as early as possible the occurrence of duodenal adenocarcinoma and upper gastrointestinal polyps with severe dysplasia.
    Arquivos de Gastroenterologia 01/2007; 44(2):133-6.
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    ABSTRACT: Strictureplasty is an alternative surgical procedure for Crohn's disease, particulary in patients with previous resections or many intestinal stenosis. To analyze surgical complications and clinical follow-up in patients submitted to strictureplasty secondary to Crohn's disease. Twenty-eight patients (57.1% male, mean age 33.3 years, range 16-54 years) with Crohn's disease and intestinal stenosis (small bowel, ileocecal region and ileocolic anastomosis) were submitted to strictureplasty, at one institution, between September 1991 and May 2004. Thirteen patients had previous intestinal resections. The mean follow-up was 58.1 months. A total of 116 strictureplasties were done (94 Heineke-Mikulicz--81%, 15 Finney--13%, seven side-to-side ileocolic strictureplasty--6%). Three patients were submitted to strictureplasty at two different surgical procedures and two in three procedures. Regarding to strictureplasty, postoperative complication rate was 25% and mortality was 3.6%. Early local complication rate was 57.1%, with three suture leaks (10.7%) and late complication was present in two patients, both with incisional hernial and enterocutaneous fistulas (28.6%). Patients remained hospitalized during a medium time of 12.4 days. Clinical and surgical recurrence rates were 63% and 41%, respectively. Among the patients submitted to another surgery, two patients had two more operations and one had three. Recurrence rate at strictureplasty site was observed in 3.5%, being Finney technique the commonest one. Presently, 19 patients had been asymptomatic with the majority of them under medical therapy. Strictureplasties have low complication rates, in spite of having been done at compromised site, with long term pain relief. Considering the clinical course of Crohn's disease, with many patients being submitted to intestinal resections, strictureplasties should be considered as an effective surgical treatment to spare long intestinal resections.
    Arquivos de Gastroenterologia 01/2007; 44(3):215-20.
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    Arquivos De Gastroenterologia. 01/2007; 44(2).
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    ABSTRACT: Equationing the mechanical behavior of digestive tube segments be-comes important as severe complications due to its rupture could be avoided. In this work, the sigmoidal model of Boltzmann was evaluated with respect of its capability of predicting Force × Elongation curves which represent the strain pattern of colic loops of rats without anastomoses. According to the results, it was observed that the applied mathematical model was capable of reproduc-ing the mechanical behavior of this biological material, giving support to the modeling of curves and further simulations of the adverse conditions to which intestine could be submitted. Resumo. O equacionamento do comportamento mecânico de segmentos de tubo digestório é importante, pois complicações graves decorrentes de sua rup-tura poderiam ser evitadas. Em razão disso, nesse trabalho, o modelo sigmoidal de Boltzmann foi avaliado com relação a sua capacidade de predição de curvas Força × Elongação representativas do padrão de deformação de alças cóli-cas íntegras de ratos. De acordo com os resultados, observou-se que o modelo matemático foi capaz de reproduzir o comportamento mecânico desse material biológico, auxiliando na modelagem das curvas e simulações de condições ad-versas quando aplicadas no intestino.
    01/2007;
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    ABSTRACT: To analyze and to evaluate the effect of the hyperbaric hyperoxygenation in the mechanical resistance of ischemic colon of rats. Eighty rats, distributed in four groups of 20 animals in each one, were used. In group 1 (G1), the control group, ischemia was not caused. Group 2 was submitted to the lesser degree of ischemia. Group 3 was submitted to the intermediate degree of ischemia. In group 4, a bigger degree of intestinal ischemia was provoked. Each group was divided in two sub-groups of ten animals each: with hyperbaric chamber (CC) and without hyperbaric chamber (SC). The animals of the four CC subgroups were placed in an experimental hyperbaric chamber in order to inhale oxygen at 100%, at two Absolute Atmospheres, for 120 minutes, for a four-day consecutive period. The animals of the four SC subgroups were kept in environment air during the five days of the experiment. All animals have been submitted to the mechanical study of the intestinal loop by the pressure test of the rupture by liquid distension. The euthanasia occurred in the fifth post-operative day. Considering the ischemia factor, the four groups were different among them (p=0.0001). There was no statistical difference between subgroups CC and SC (p=0.3461). The hyperbaric oxygen-therapy did not present improvement on the induced ischemia in rats upright colic loop.
    Acta Cirurgica Brasileira 01/2007; 22(2):85-91. · 0.63 Impact Factor
  • Arquivos De Gastroenterologia. 01/2007; 44(3).
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    ABSTRACT: Pouchitis after total retocolectomy is one of the most common complication of patients with ulcerative colitis (UC), while its frequency is quite rare in familial adenomatous polyposis (FAP). PURPOSE: To evaluate the inflammatory activity in endoscopicaly normal mucosa of the ileal pouch, by determining the expression of TNF-a and IL-1b, and the activation of NF-kB. METHODS AND PATIENTS: Twenty patients with "J" pouch after total retocolectomy were studied, being 10 patients with UC and 10 with FAP. The control group was constituted by biopsies from terminal ileum take during normal colonoscopy examination. Biopsies from mucosa of the pouch and from normal ileum were done, and they were snap-frozen in liquid nitrogen. The expression of TNF-a and IL-1b were analyzed by total extract, and NF-kB was evaluated by immunoprecipitation and immunoblot. RESULTS: Expression of TNF-a and IL-1b was increased in patients with UC, when it was compared with FAP (p<0.05). Conversely, the expression of NF-kB was increased in patients with UC, witch was not different from FAP. The control group had little expression of TNF-a (p<0.01). The activation of NF-kB (p>0.1) and the expression of IL-1b (p>0.05) were similar, when comparing UC and FAP with control group. CONCLUSION: The patients with UC presented increased levels of the studied cytokines, even without clinic and endoscope evidence of pouchitis. These findings could be a suggestion of higher susceptibility to this complication among patients with UC.
    Revista Brasileira de Coloproctologia 12/2006; 26(4):399-405.
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    ABSTRACT: PURPOSE: Rectoanal reflex parameters were analyzed in multiparous. METHODS: Thirty-six patients with 4 to 6 (Group 1) and 10 patients with 1 to 3 (Group2) vaginal deliveries were submitted to anal manometry with four channel radial catheter. Various parameters of the rectoanal inhibitory reflex were analyzed in each quadrant at the anal canal highest pressure zone. RESULTS: There were significant differences in the anal pressures at the point of maximum relaxation curve among quadrants in Group 1 as well as with the anal resting pressure in Group 2. The comparision between Groups showed differences in anal resting pressure in posterior right lateral and left lateral quadrants as well as in posterior and left lateral at the maximum relaxation point. CONCLUSION: Radial differences in the anal pressure before relaxation and in rectoanal inhibitory reflex parameters are present; however there is not an obvious relevance under the clinical point of view.
    Revista Brasileira de Coloproctologia 09/2006; 26(3):293-299.
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    ABSTRACT: To compare total energy of rupture and traction force of rupture tests within a rupture resistance study of descendent colon of rats. Twelve descendent colon segments of rats were considered to perform the study. For each one of the specimens, total energy of rupture and traction force of rupture necessary to promote colic wall burst were evaluated through the biomechanical total energy of rupture test using the Biomechanical Data Acquisition and Analysis System, version 2.0. Average, standard deviation, standard error of average and coefficient of variation were considered for analysis of results. Traction force of rupture average, standard deviation, standard error of average and coefficient of variation were 380.05 gf, 98.74, 28.5 e 25.98%, respectively while total energy of rupture presented average of 244.85 gf, standard deviation of 57.76, standard error of average of 16.67 and coefficient of variation of 23.59. Although, total energy of rupture considered a larger number of attributes to its calculation related to non-linear viscoelastic materials, such as colic wall, it presented a smaller coefficient of variation when compared to traction force of rupture, thus demonstrating to constitute a possible parameter to analyze intestinal resistance of rats.
    Acta Cirurgica Brasileira 01/2006; 21(2):97-100. · 0.63 Impact Factor

Publication Stats

88 Citations
22.47 Total Impact Points

Institutions

  • 1992–2008
    • University of Campinas
      • • Faculdade de Ciências Médicas (FCM)
      • • Departamento de Cirurgia
      • • Departamento de Tocoginecologia
      Campinas, Estado de Sao Paulo, Brazil
  • 2005
    • Faculdade de Medicina de São José do Rio Preto
      • Department of Surgery
      São José do Rio Preto, Estado de Sao Paulo, Brazil
  • 2002
    • São Paulo State University
      • Faculdade de Medicina de Botucatu
      São Paulo, Estado de Sao Paulo, Brazil