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Ghezzi TL, Tarta C, Contu PC, Lazzaron AR, Contin BM, Kliemann LM, Damin DC. Distal resection margins in rectal cancer specimens: differences in assessment between surgeons and pathologists and the influence of neoadjuvant chemoradiation. Updates Surg 2021; 73:1787-1793. [PMID: 34100187 DOI: 10.1007/s13304-021-01102-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 05/25/2021] [Indexed: 11/25/2022]
Abstract
To investigate the discrepancy between the distal resection margin (DRM) assessed by surgeons and pathologists, and the impact of neoadjuvant chemoradiotherapy (nCRT) on DRM. This study included 67 rectal cancer patients undergoing elective surgery. DRMs were assessed through four different techniques: in vivo subjective estimative, made by the surgeon before the rectal resection (by palpation and visual estimative); in vivo objective, measured with a ruler before the rectal transection; ex vivo objective, measured right after resection of the specimen; post-fixation objective measurement, conducted by the pathologist. The DRMs subjectively and objectively assessed by the surgeons were not significantly different (3.40 cm vs. 3.45 cm). There was a mean reduction in the length of DRMs of 35.6%, from 3.45 cm objectively measured by the surgeon to 2.20 cm measured by the pathologist. This difference was significant among patients that did not receive nCRT (3.90 cm vs. 2.30 cm, P < 0.001), but not among those who received nCRT (2.30 vs. 2.05 cm). Surgeons are accurate in assessing rectal cancer DRMs. There are significant differences between intraoperative measurements of DRMs and the final pathologic results. However, these differences are not seen when nCRT is used, a finding that may be useful when sphincter preservation is being considered.
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Affiliation(s)
- T L Ghezzi
- Division of Coloproctology, Hospital de Clínica de Porto Alegre, Rua Ramiro Barcelos 2350, sala (room) 600, Porto Alegre, Rio Grande Do Sul, 90 035-903, Brazil
| | - C Tarta
- Division of Coloproctology, Hospital de Clínica de Porto Alegre, Rua Ramiro Barcelos 2350, sala (room) 600, Porto Alegre, Rio Grande Do Sul, 90 035-903, Brazil
| | - P C Contu
- Division of Coloproctology, Hospital de Clínica de Porto Alegre, Rua Ramiro Barcelos 2350, sala (room) 600, Porto Alegre, Rio Grande Do Sul, 90 035-903, Brazil
| | - A R Lazzaron
- Division of Coloproctology, Hospital de Clínica de Porto Alegre, Rua Ramiro Barcelos 2350, sala (room) 600, Porto Alegre, Rio Grande Do Sul, 90 035-903, Brazil
- Postgratuate Program in Surgical Sciences, School of Medicine, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - B M Contin
- Postgratuate Program in Surgical Sciences, School of Medicine, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - L M Kliemann
- Department of Pathology, School of Medicine, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - D C Damin
- Division of Coloproctology, Hospital de Clínica de Porto Alegre, Rua Ramiro Barcelos 2350, sala (room) 600, Porto Alegre, Rio Grande Do Sul, 90 035-903, Brazil.
- Postgratuate Program in Surgical Sciences, School of Medicine, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
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Costa BP, Schein V, Zhao R, Santos AS, Kliemann LM, Nunes FB, Cardoso JCR, Félix RC, Canário AVM, Brum IS, Branchini G. Stanniocalcin-1 protein expression profile and mechanisms in proliferation and cell death pathways in prostate cancer. Mol Cell Endocrinol 2020; 502:110659. [PMID: 31816356 DOI: 10.1016/j.mce.2019.110659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 11/18/2019] [Accepted: 11/18/2019] [Indexed: 10/25/2022]
Abstract
Prostate cancer (PCa) is one of the most prevalent male tumours. Stanniocalcin-1 (STC1) is a glycoprotein and, although the role of STC1 in human cancer is poorly understood, it is suggested to be involved in the development and progression of different neoplasms. This study investigated the protein expression profile of STC1 in PCa and benign prostatic hyperplasia (BPH) samples and STC1 signalling during cell proliferation and cell death in vitro using cell lines. We found higher levels of STC1 in PCa when compared to BPH tissue and that STC1 inhibited forskolin stimulation of cAMP in PC-3 cells. A monoclonal antibody against STC1 was effective in reducing cell proliferation, in promoting cell cycle arrest, and in increasing apoptosis in the same cells. Since STC1 acts as a regulator of prostatic tissue signalling, we suggest that this protein is a novel candidate biomarker for prostate tumour clinical progression and a potential therapeutic target.
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Affiliation(s)
- Bruna Pasqualotto Costa
- Programa de Pós-Graduação em Patologia, Universidade Federal do Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, Brazil
| | - Vanessa Schein
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - R Zhao
- Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, Brazil
| | | | - Lucia Maria Kliemann
- Departamento de Patologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Fernanda Bordignon Nunes
- Programa de Pós-Graduação em Patologia, Universidade Federal do Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, Brazil
| | - J C R Cardoso
- Centre of Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, Faro, Portugal
| | - Rute Castelo Félix
- Centre of Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, Faro, Portugal
| | - A V M Canário
- Centre of Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, Faro, Portugal
| | - Ilma Simoni Brum
- Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Gisele Branchini
- Programa de Pós-Graduação em Patologia, Universidade Federal do Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, Brazil.
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Cabral VD, Cerski MR, Sa Brito IT, Kliemann LM. p14 expression differences in ovarian benign, borderline and malignant epithelial tumors. J Ovarian Res 2016; 9:69. [PMID: 27770808 PMCID: PMC5075411 DOI: 10.1186/s13048-016-0275-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 10/05/2016] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Abnormalities in tumor suppressors p14, p16 and p53 are reported in several human cancers. In ovarian epithelial carcinogenesis, p16 and p53 show higher immunohistochemical staining frequencies in malignant tumors and are associated with poor prognoses. p14 was only analyzed in carcinomas, with conflicting results. There are no reports on its expression in benign and borderline tumors. This study aims to determine p14, p16 and p53 expression frequencies in ovarian benign, borderline and malignant tumors and their associations with clinical parameters. METHODS A cross-sectional study utilizing immunohistochemistry was performed on paraffin-embedded ovarian epithelial tumor samples. Clinical data were collected from medical records. Fisher's exact test and the Bonferroni correction were performed for frequency associations. Survival comparisons utilized Kaplan-Meier and log rank testing. Associations were considered significant when p < 0.05. RESULTS p14 absent expression was associated with malignant tumors (60 % positive) (p = 0.000), while 93 % and 94 % of benign and borderline tumors, respectively, were positive. p16 was positive in 94.6 % of carcinomas, 75 % of borderline and 45.7 % of benign tumors (p = 0.000). p53 negative staining was associated with benign tumors (2.9 % positive) (p = 0.016) but no difference was observed between borderline (16.7 %) and malignant tumors (29.7 %) (p = 0.560). No associations were found between expression rates, disease-free survival times or clinical variables. Carcinoma subtypes showed no difference in expression. CONCLUSIONS This is the first description of p14 expression in benign and borderline tumors. It remains stable in benign and borderline tumors, while carcinomas show a significant absence of staining. This may indicate that p14 abnormalities occur later in carcinogenesis. p16 and p53 frequencies increase from benign to borderline and malignant tumors, similarly to previous reports, possibly reflecting the accumulation of inactive mutant protein. The small sample size may have prevented statistically significant survival analyses and clinical correlations. Future studies should investigate genetic abnormalities in p14 coding sequences and include all types of ovarian epithelial tumors. Bigger sample sizes may be needed for significant associations.
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Affiliation(s)
- Vinicius Duarte Cabral
- Serviço de Patologia, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2350, Porto Alegre, RS, 90035-90, Brazil.
| | - Marcelle Reesink Cerski
- Serviço de Patologia, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2350, Porto Alegre, RS, 90035-90, Brazil
| | - Ivana Trindade Sa Brito
- Serviço de Patologia, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2350, Porto Alegre, RS, 90035-90, Brazil
| | - Lucia Maria Kliemann
- Serviço de Patologia, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2350, Porto Alegre, RS, 90035-90, Brazil
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Pimentel AM, Kliemann LM, Brum DDS, Leivas FG, Sanches PRS, Capp E, Corleta HVE. Adequacy of ovarian diathermy under ultrasound control: an experimental model. J Ovarian Res 2013; 6:54. [PMID: 23886295 PMCID: PMC3733766 DOI: 10.1186/1757-2215-6-54] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 07/25/2013] [Indexed: 11/20/2022] Open
Abstract
Background To develop a minimally invasive ovarian cauterization technique under transvaginal ultrasound control and evaluate the safety and feasability of monopolar cauterization to cause ovarian injury using female cattle of reproductive age as an experimental model. Method Experimental study in a university research center was performed. Eleven female bovines of reproductive age were submitted to monopolar transvaginal ovarian cauterization. The right ovary (RO) was punctured at four sites and 40 W was applied for 5 s at each point, resulting in a total of 800 J (Joules) of thermal energy. In the left ovary (LO), the procedure was similar, with the same time and 80 W, resulting in a thermal energy of 1600 J. Macroscopic and microscopic lesions were assessed. Results Of 22 ovaries punctured, 20 were cauterized and exhibited macroscopic and typical microscopic lesions. No lesions could be found in the needle path. The measures of the areas of microscopic electrocautery lesions calculated estimating a cylindrical volume showed a median of 1.12% in the right ovary and 1.65% in the left ovary. When the estimate was calculated by spherical shape, the medians were 1.77% in the right ovary and 3.06% in the left ovary. There was a statistically significant difference in these two estimates (sphere, p = 0.008; cylinder, p = 0.021). Conclusion The experimental animal model described for transvaginal ultrasound-guided ovarian needle cauterization seems to be feasible. The ovaries were successfully cauterized without injuries in needle path and more energy resulted in significantly more thermal lesion. The safety and effectiveness of this technique, theoretically less invasive than current ovarian drilling methods, could be tested in anovulatory women with PCOS.
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Affiliation(s)
- Anita Mylius Pimentel
- Programa de Pós-Graduação em Medicina: Ciências Médicas, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Lucia Maria Kliemann
- Departamento de Patologia, Faculdade de Medicina, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Daniela Dos Santos Brum
- Laboratório de Biotecnologia da Reprodução (Biotech), Campus Uruguaiana, Universidade Federal do Pampa (UNIPAMPA), Uruguaiana, Brazil
| | - Fábio Gallas Leivas
- Laboratório de Biotecnologia da Reprodução (Biotech), Campus Uruguaiana, Universidade Federal do Pampa (UNIPAMPA), Uruguaiana, Brazil
| | - Paulo Roberto Stefani Sanches
- Serviço de Pesquisa e Desenvolvimento em Engenharia Biomédica-GPPG, Centro de Pesquisas, Hospital de Clinicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Edison Capp
- Programa de Pós-Graduação em Medicina: Ciências Médicas, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil ; Departamento de Ginecologia e Obstetrícia, Faculdade de Medicina, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Helena von Eye Corleta
- Programa de Pós-Graduação em Medicina: Ciências Médicas, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil ; Departamento de Ginecologia e Obstetrícia, Faculdade de Medicina, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil ; Serviço de Ginecologia e Obstetrícia - Hospital de Clínicas de Porto Alegre, Rua Ramiro Barcelos, 2350/11º andar, Porto Alegre, RS CEP 90035-903, Brazil
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Damin AP, Agnes G, Tarta C, Contu PC, Ghezzi TL, Kliemann LM, Damin DC. Human papillomavirus detected in a colonic metastasis of cervical adenocarcinoma. Tech Coloproctol 2013; 18:515-6. [PMID: 23549714 DOI: 10.1007/s10151-013-1004-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 03/10/2013] [Indexed: 11/27/2022]
Affiliation(s)
- A P Damin
- Laboratory of Molecular Biology, Federal University of Health Science of Porto Alegre, Porto Alegre, Brazil
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Letti Müller AL, Barrios PDM, Kliemann LM, Valério EG, Gasnier R, Magalhães JADA. Tei index to assess fetal cardiac performance in fetuses at risk for fetal inflammatory response syndrome. Ultrasound Obstet Gynecol 2010; 36:26-31. [PMID: 20131338 DOI: 10.1002/uog.7584] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVES To examine, in patients with premature rupture of the amniotic membranes (PROM) at < 34 weeks of gestation, the relationship between fetal myocardial performance measured by the Tei index and fetal inflammatory response syndrome (FIRS). METHODS A case-control study was conducted including 15 preterm PROM patients with gestational age between 24 and 33 weeks admitted to Hospital de Clínicas de Porto Alegre, and 15 controls with the same gestational age range. Fetal echocardiography with Doppler was performed at admission for the preterm PROM group, with serial examinations every 7-10 days thereafter until delivery, and at the time of inclusion in the control group. Flow velocity waveforms were obtained for the left ventricle, from which the Tei index was calculated. Placental histopathology and perinatal outcome were compared between the groups. RESULTS The left ventricular Tei index was significantly greater in fetuses with preterm PROM compared with controls (0.63 +/- 0.13 vs. 0.51 +/- 0.10, P = 0.007). While there was no difference in isovolumetric times, the left ventricular ejection time was significantly shorter in the preterm PROM group (164 +/- 17 ms vs. 184 +/- 16 ms, P = 0.003). In the preterm PROM group, neonatal sepsis was diagnosed in 73.3%, and funisitis and chorionic vasculitis confirmed FIRS in 53.3%, compared with 6.7% for these three diagnoses in controls (P = 0.001). CONCLUSIONS These data provide further evidence that cardiac dysfunction is present in the setting of preterm PROM. The study of myocardial performance with the Tei index is a novel non-invasive approach to assess cardiac function and monitor the fetus affected with FIRS.
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Affiliation(s)
- A L Letti Müller
- Gynecology and Obstetrics Service, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
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Damin DC, Tolfo GC, Rosito MA, Spiro BL, Kliemann LM. Sentinel lymph node in patients with rectal cancer invading the anal canal. Tech Coloproctol 2010; 14:133-9. [PMID: 20424879 DOI: 10.1007/s10151-010-0582-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2009] [Accepted: 03/19/2010] [Indexed: 01/22/2023]
Abstract
BACKGROUND To assess the feasibility of the sentinel lymph node procedure in patients with rectal cancer extending to the anal canal. METHODS Between January 2005 and April 2008, 15 patients with adenocarcinoma of the rectum with direct invasion of the anal canal and no clinical evidence of inguinal involvement were prospectively enrolled in the study. The sentinel node procedure consisted of a combination of preoperative radiocolloid lymphoscintigraphy and intraoperative detection of the inguinal sentinel node with a gamma probe. Patent blue dye was also used to facilitate direct identification of the blue-stained lymph node. After removal, the sentinel node was studied by hematoxylin-eosin staining and immunohistochemistry. RESULTS Detection and removal of inguinal sentinel nodes was possible in all patients. Four patients (26.7%) had sentinel nodes identified as positive for metastatic adenocarcinoma. All positive cases also had metastases detected in perirectal lymph nodes; three of them developed hepatic or pulmonary metastases within 6 months after surgery. Of the 11 patients with negative sentinel nodes, only four (36.4%) also presented metastatic perirectal lymph nodes. Although none of the negative cases developed late inguinal metastases, three developed systemic or pelvic recurrence within 12 months after surgery. CONCLUSIONS The standardized procedure was highly effective in sampling inguinal sentinel nodes in very low rectal cancers, allowing the detection of subclinical metastatic disease. Although this technique can be potentially useful for a subgroup of patients with isolated inguinal metastases, it cannot be routinely recommended for patients with rectal tumors invading the anal canal at this moment.
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Affiliation(s)
- D C Damin
- Department of Surgery, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
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da Silva J, de Freitas TR, Heuser V, Marinho JR, Bittencourt F, Cerski CT, Kliemann LM, Erdtmann B. Effects of chronic exposure to coal in wild rodents (Ctenomys torquatus) evaluated by multiple methods and tissues. Mutat Res 2000; 470:39-51. [PMID: 10986474 DOI: 10.1016/s1383-5718(00)00094-2] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Rio Grande do Sul (RS) coal is low quality and typically obtained by strip mining. In a recent study concerning 2 years of biomonitoring in coal regions, we demonstrated the genotoxicity of coal and related products on blood cells of native rodents, from RS, Brazil. With the goal of studying the variations in the effects of RS coal on different tissues of the same rodent, we utilized, besides the single cell gel (SCG) and micronucleus (MN) assay on blood, histological analyses and SCG assay of bone marrow, spleen, kidney, liver and lung cells, and MN assay of bone marrow and spleen cells. In addition, to identify agents that can potentially influence the results, concentrations of several heavy metals were analyzed in livers and in soil, and the total concentration of hydrocarbons in the soil was determined. Rodents exposed to coal were captured at two different sites, Butiá and Candiota, in RS. Reference animals were obtained from Pelotas, where there is no coal mining. This report provides chemical and biological data from coal regions, indicating the possible association between Zn, Ni, Pb and hydrocarbons in the induction of DNA damage (e.g. single strand-breaks and alkali-labile sites) determined by the alkaline SCG assay in cells from Ctenomys torquatus. The results of the present SCG study indicate that coal and by-products not only induce DNA damage in blood cells, but also in other tissue cells, mainly liver, kidney and lung. Neither the MN assay nor histopathological observations showed significant differences; these analyses may be useful under circumstances where genotoxicity is higher. In conclusion we believe that the in vivo genotoxicity of coal can be biomonitored by the SCG assay, and our studies suggest that wild rodents, such as C. torquatus are useful for monitoring genotoxic damage by both methods, the SCG assay and the MN test.
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Affiliation(s)
- J da Silva
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Goncalves 9500, CP 15053, CEP 91501-970, -RS, Porto Alegre, Brazil.
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Melo LL, Kruel CD, Kliemann LM, Cavazzola LT, Boeno RDL, Silber PC, Grossi RS. Influence of surgically induced gastric and gastroduodenal content reflux on esophageal carcinogenesis--experimental model in Wistar female rats. Dis Esophagus 1999; 12:106-15. [PMID: 10466042 DOI: 10.1046/j.1442-2050.1999.00011.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Studies in human beings and animals have shown that esophageal exposure to duodenal and gastric contents may be important for the development of Barrett's esophagus and its complications, including adenocarcinoma and epidermoid carcinoma. Diethylnitrosamine (DEN) is a carcinogen that stimulates the development of epidermoid carcinoma in the esophagus of mice. The aim of this study was to evaluate the effect of gastroduodenal and gastric content reflux on induction of esophageal carcinogenesis. Gastroesophageal reflux (GER) and gastroduodenoesophageal reflux (GDER) were produced by cardioplasty and esophagoduodenostomy. The chosen carcinogen was DEN, diluted in drinking water, given 3 days a week for 20 consecutive weeks. One hundred Wistar female rats were divided into six groups, as follows: group 1 (18 rats), cardioplasty without DEN; group 2 (18 rats), cardioplasty with DEN; group 3 (10 rats), only water; group 4 (17 rats), cardioplasty with DEN; group 5 (17 rats), esophagoduodenostomy with DEN; group 6 (20 rats), only DEN. GER in isolation induced papillomatosis or ulceration in 22.2% of rats and, when associated with DEN, induced papillomatosis in 61.1% of rats. GDER in isolation induced marked esophagitis in 61.1% of rats, Barrett's esophagus in 16.7% and esophageal adenocarcinoma in 16.7%; when associated with DEN, 23.5% of rats presented marked esophagitis, papillomatosis or ulceration, whereas 76.5% had esophageal carcinoma, with 70.6% epidermoid carcinoma and 5.9% adenocarcinoma. Rats treated with water alone did not show histologic abnormalities of the esophageal mucosa. Rats treated with DEN alone developed papillomas in 50.0% of the cases and remained histologically unchanged in 50.0%. There was no development of low- or high-grade dysplasia in any group. The conclusions are that (1) GDER is significantly more deleterious to esophageal mucosa than GER; (2) in this study, GER did not present carcinogenic potential in relation to the esophagus; (3) GDER in isolation is an esophageal carcinogen, producing Barrett's esophagus and esophageal adenocarcinoma; (4) esophageal oncogenesis caused by GDER is potentiated by DEN, inducing esophageal epidermoid carcinoma; (5) in this study, DEN in isolation did not generate tumors in the esophagus of rats.
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Affiliation(s)
- L L Melo
- Department of Gastroenterology, Medical School, Universidade Federal do Rio Grande do Sul, Brazil
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Cerski CT, Lopes MF, Kliemann LM, Zimmermann HH. [Transoperative anatomopathologic examinations: quality control]. Rev Assoc Med Bras (1992) 1994; 40:243-6. [PMID: 7633498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Frozen sections (FS) are usually performed in a General Hospital and are very useful for the surgical procedure orientation. PURPOSE--To verify the accuracy of the FS performed at the Hospital de Clínicas de Porto Alegre (HCPA), RS, Brazil. METHOD--2,152 FS were carried out between March 1986-September 1991, in a prospective study. RESULTS--3.7% of the conventional pathologic examinations (58,127), performed in the same period, correspond to the FS examined. When the FS diagnosis differed from the definitive one (in paraffin) it was classified as False Positive (0.4%), False Negative (1.8%) or inconclusive (2.8%). The organs more frequently examined were lymph nodes (19.3%), ovary (17.21%), breast (16.6%) and thyroid gland (12.4%). We observed accuracy indices in 95% of the FS examined, and in 97.8% when excluding the inconclusive ones. CONCLUSION--The accuracy indices of FS performed in HCPA were similar to the ones found in the literature, which vary from 90.4% to 98.5%.
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Affiliation(s)
- C T Cerski
- Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, RS
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