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1.
J. Health Biol. Sci. (Online) ; 11(1): 1-4, Jan. 2023. ilus
Article in Portuguese | LILACS | ID: biblio-1443827

ABSTRACT

Introdução: O leiomiossarcoma é um tumor maligno de células mesenquimais. Este estudo tem como objetivo apresentar um caso clínico de sarcoma paratesticular subtipo leiomiossarcoma, tendo em vista sua escassez na literatura. Relato de caso: Paciente, 40 anos, sexo masculino, negro, hígido, iniciou quadro de dor em região de bolsa escrotal. Foi submetido à ultrassonografia que evidenciou tumor testicular à esquerda. Foi realizada abordagem cirúrgica. Considerações finais: O leiomiossarcoma é um tumor maligno com envolvimento de músculo liso. Devido à raridade do leiomiossarcoma paratesticular, não existe protocolo estabelecido na literatura. A importância da equipe multidisciplinar e especializada com acompanhamento longitudinal tem o intuito de instituir a terapia padrão-ouro e evitar recorrência.


Introduction: Leiomyosarcoma is a malignant tumor of mesenchymal cells. This study aims to present a clinical case of paratesticular sarcoma subtype leiomyosarcoma given its scarcity in the literature. Case report: The patient, 40 years old, male, black, healthy, started with pain in the scrotal region. He was submitted to ultrasonography which showed a testicular tumor on the left. A surgical approach was performed. Final consideration: Leiomyosarcoma is a malignant tumor with smooth muscle involvement. Due to the rarity of paratesticular leiomyosarcoma, there is no established protocol in the literature. The importance of a multidisciplinary and specialized team with longitudinal follow-up to establish the gold standard therapy and avoid recurrence.


Subject(s)
Leiomyosarcoma
2.
Acta cir. bras ; 35(11): e351108, 2020. graf
Article in English | LILACS | ID: biblio-1141939

ABSTRACT

Abstract Purpose: To develop a model for simulated training of ureteropyelic anastomosis in laparoscopicpyeloplasty. Methods: Longitudinal and experimental study, with 16 participants. A synthetic instrument was produced to simulate the renal pelvis and the proximal portion of the ureter positioned on a platform within laparoscopic simulators, thereby resulting in the realistic simulation of the ureteropelvic anastomosis. A step-by-step guide was also developed for the accomplishment of the ureteropelvic anastomosis training model. Results: In the evaluation of all participants' suture training, a decrease was found in the time needed to perform the anastomosis, with a median of 17.83 min in the 1st step and 14.21 min in the last one (p = 0.01). Regarding the knots, in the 1st step, 5% of them were considered firm, with an evolution to 30% in the last step (p = 0.011). Conclusion: We noticed improvement in the ability to perform the ureteropelvic anastomosis by participants with no experience with it. Therefore, even unexperienced participants can improve their skills with this training. Moreover, we observed the effectiveness of the model use, confirmed by the participants' opinion and its validation by expert surgeons.


Subject(s)
Humans , Ureter/surgery , Ureteral Obstruction/surgery , Laparoscopy , Plastic Surgery Procedures , Anastomosis, Surgical , Kidney Pelvis/surgery
3.
Rev. Col. Bras. Cir ; 40(2): 137-141, mar.-abr. 2013. ilus, tab
Article in Portuguese | LILACS | ID: lil-676368

ABSTRACT

OBJETIVO: Avaliar as repercussões hepáticas da carcinogênese colônica induzida por diferentes doses e tempos de exposição ao azoximetano em ratos Wistar. MÉTODOS: Quarenta e quatro ratos foram distribuídos em quatro grupos. Os animais tinham oito semanas no início do experimento. No grupo 1, receberam 1.0mL de solução salina intraperitonealmente uma vez por semana por duas semanas. No grupo 2, receberam 15 mg/kg de azoximetano intraperitonealmente uma vez por semana por duas semanas. Esses animais foram mortos na 15ª semana do experimento. Os animais do grupo 3 receberam solução salina intraperitonealmente uma vez por semana por duas semanas. Os animais do grupo 4 receberam 20mg/kg de azoximetano intraperitonealmente uma vez por semana por duas semanas. Esses animais foram mortos na 26ª semana do experimento. Os fragmentos de tecido hepático foram corados pela hematoxilina e eosina e avaliadas microscopicamente. RESULTADOS: Grupo 1 e grupo 2 diferiram significantemente em relação a esteatose, mas não houve diferença entre o grupo 3 e o grupo 4. No entanto, no grupo 4 foram observadas lesões pré-neoplásicas (focos de células alteradas, claras, vacuoladas, basofílicas, anfofílicas, tigróides, oncocíticas, pequenas ou acidófilas, espongioses e pelioses) e lesões neoplásicas (colangiomas e adenomas) contendo hepatócitos atípicos de permeio, não identificados no grupo 3. CONCLUSÃO: No modelo de carcinogênese colorretal, lesões hepáticas pré-neoplásicas e neoplásicas aparecem e evoluem na proporção do tempo e dose de exposição ao azoximetano.


OBJECTIVE: To evaluate the hepatic effects of colonic carcinogenesis induced by azoxymethane at different doses and times of exposure in rats. METHODS: Forty-four Wistar rats were divided into four groups. The animals were eight weeks at the beginning of the experiment. group 1 received 1.0ml of saline intraperitoneally once a week for two weeks. Group 2 received 15 mg/kg of azoxymethane intraperitoneally once a week for two weeks. These animals were killed at the 15th week of the experiment. The animals of group 3 received saline intraperitoneally once a week for two weeks. Group 4 animals received 20mg/kg of azoxymethane intraperitoneally once a week for two weeks. These animals were killed at the 26th week of the experiment. The fragments of liver tissue were stained with hematoxylin and eosin and evaluated microscopically. RESULTS: Groups 1 and 2 differed significantly in relation to steatosis, no difference having been found between group 3 and group 4. However, in group 4 we observed pre-neoplastic lesions (foci of altered, clear, vacuolated, basophilic, amphophilic tigroid, oncocytic, small or acidophilus cells, spongiosis and peliosis) and neoplastic lesions (adenomas and colangiomas) containing atypical hepatocytes in between, not identified in group 3. CONCLUSION: In the model of colorectal carcinogenesis, preneoplastic and neoplastic hepatic lesions appear and evolve in proportion to the time of exposure and dose of azoxymethane.


Subject(s)
Animals , Rats , Azoxymethane/administration & dosage , Carcinogenesis/drug effects , Carcinogens/administration & dosage , Colorectal Neoplasms/chemically induced , Colorectal Neoplasms/complications , Liver Diseases/etiology , Precancerous Conditions/etiology , Azoxymethane/pharmacology , Carcinogens/pharmacology , Liver Diseases/pathology , Rats, Wistar
4.
Acta cir. bras ; 27(1): 30-36, Jan. 2012. tab
Article in English | LILACS | ID: lil-607993

ABSTRACT

PURPOSE: To determine whether a hypercaloric and hyperlipidic diet enriched with polyunsaturated fatty acids influences the formation of aberrant crypt foci (ACF) in colonic mucosa of Wistar rats treated with azoxymethane (AOM). METHODS: At eight weeks of life, the rats were assigned to four groups: Group I―standard diet (STD) not treated with AOM; Group II―hypercaloric and hyperlipidic diet (FED), not treated with AOM; Group III―STD, treated with AOM; Group IV―FED, treated with AOM. At 16 weeks, the animals were injected intraperitoneal with 0.9 percent saline solution (Group I and II) or AOM at 15mg/Kg (Groups III and IV) once a week for two weeks. Fifteen weeks later, the animals were euthanized. RESULTS: FED promoted weight gain in Groups II and IV compared to Groups I and III, respectively. The groups did not differ with regard to the total number of ACF. The Chi-square test revealed no predominance of the presence of foci with <4 crypts. However, foci with ≥5 crypts were proportionally more prevalent in Group III than in Group IV (p=0.043). CONCLUSION: The administration of polyunsaturated fatty acids did not interfere with the formation of aberrant crypt foci, but reduced ACF multiplicity, exercising an attenuating effect on carcinogenesis.


OBJETIVO: Determinar se uma dieta hipercalórica, hiperlipídica, rica em ácidos graxos poliinsaturados (FED) tem influência na formação de focos de cripta aberrante (FCA) em mucosa cólica de ratos Wistar expostos ao azoximetano (AOM). MÉTODOS: Com oito semanas de vida, os ratos foram distribuídos em quatro grupos: Grupo I: Dieta padrão (SD) sem AOM; Grupo II: FED, sem AOM; Grupo III: SD, com AOM; Grupo IV: FED com AOM. Com 16 semanas, os animais dos grupos I e II receberam injeções intraperitoneais de solução salina 0,9 por cento, enquanto os dos grupos III e IV receberam AOM na dose de 15mg/Kg de peso, 1 vez por semana por duas semanas. Quinze semanas após, os animais foram mortos. RESULTADOS: FED promoveu aumento de peso nos grupos II e IV em relação aos grupos I e III. Não houve aumento significante no número total de FCA entre os grupos. Em relação à multiplicidade das criptas por FCA, o teste do qui-quadrado mostrou que não houve predominância da presença <4 criptas por foco. Contudo, focos ≥5 criptas foram proporcionalmente mais prevalentes no grupo III que no grupo IV (p=0,043). CONCLUSÃO: Os ácidos graxos poliinsaturados não interferem na formação de focos de cripta aberrante, contudo reduz sua multiplicidade, exercendo efeito atenuador na carcinogênese.


Subject(s)
Animals , Male , Rats , Aberrant Crypt Foci/prevention & control , Colorectal Neoplasms/prevention & control , Fatty Acids, Unsaturated/administration & dosage , Aberrant Crypt Foci/chemically induced , Aberrant Crypt Foci/pathology , Azoxymethane/toxicity , Body Weight/drug effects , Carcinogens/toxicity , Colon/drug effects , Colorectal Neoplasms/chemically induced , Colorectal Neoplasms/pathology , /administration & dosage , /administration & dosage , Intestinal Mucosa/drug effects , Random Allocation , Rats, Wistar
5.
Acta cir. bras ; 25(2): 148-152, Mar.-Apr. 2010. ilus, graf, tab
Article in English | LILACS | ID: lil-540490

ABSTRACT

Purpose: Test immersion of microscopy samples in water as an aid to visualizing and quantifying aberrant crypt foci (ACF) in rat colon mucosa. Methods: Carcinogenesis was induced with azoxymethane in Wistar rats kept on a conventional diet or a hypercaloric diet containing unsaturated fat. Fifteen weeks after induction, colon samples were retrieved and fixated in a 10 percent formaldehyde solution. The samples were divided into segments (distal, middle, proximal) and stained with 1 percent toluidine blue. The technique tested in the study consisted of immersing microscopy samples in distilled water in order to eliminate the problem of light reflection known from conventional microscopy. Results: When samples were immersed in water during microscopy, significantly more ACF could be visualized in all colon segments than with the conventional method proposed by Bird. Conclusion: Immersing microscopy samples in water aids the visualization and quantification of aberrant crypt foci in rat colon mucosa fixed in formaldehyde.


Objetivo: Otimizar a visibilização de focos de criptas aberrantes (FCA) em mucosa cólica de ratos Wistar. Métodos: Colo de rato Wistar, sob diferentes dietas e submetidos a iniciação de carcinogênese pelo azoximetano há 4 meses, foram previamente lavados, abertos e fixados em solução de formalina a 10 por cento por 24 horas. Após serem corados em azul de toluidina a 1 por cento, foram divididos em segmentos distal, médio e proximal e imersos em água destilada para quantificação de FCA. Resultados: No método de imersão foi visibilizado maior quantidade de focos de criptas aberrantes em todos os segmentos cólicos, com diferença significante, quando comparado com o método de Bird. Conclusão: O método de imersão otimiza a visibilização e quantificação de focos de criptas aberrantes em mucosa cólica (ratos Wistar) fixada em solução de formalina a 10 por cento.


Subject(s)
Animals , Rats , Aberrant Crypt Foci/pathology , Colorectal Neoplasms/pathology , Intestinal Mucosa/pathology , Azoxymethane , Aberrant Crypt Foci/chemically induced , Carcinogens , Colorectal Neoplasms/chemically induced , Microscopy/methods , Rats, Wistar
6.
Rev. bras. cir. cardiovasc ; 25(1): 118-121, Jan.-Mar. 2010. ilus
Article in English, Portuguese | LILACS | ID: lil-552851

ABSTRACT

O uso de enxerto composto de artéria torácica interna esquerda (ATIE) com segmentos arteriais ou segmentos de veia safena magna (VSM) pode permitir a revascularização completa do sistema coronariano esquerdo (SCE) sem circulação extracorpórea (CEC) e sem manuseio da aorta ascendente (MAA), como forma de tentar reduzir alguns riscos e complicações no pós-operatório imediato. Neste trabalho, relatamos os resultados angiográficos, após oito anos, de dois pacientes submetidos à cirurgia de revascularização do SCE com enxerto composto de ATIE e VSM, sem CEC e sem MAA.


The use of a composite graft with left internal thoracic artery (LITA) and arterial or saphenous vein (SV) grafts can allow the complete revascularization of the left coronary system (LCS) without cardiopulmonary bypass (CPB) and without ascending aorta manipulation (AAM), in order to reduce some complications in the immediate postoperative. This study shows 8-year angiographic follow-up results of two patients underwent no-touch aorta off-pump coronary artery bypass grafting (CABG) using LITA and SV as a composite graft to supply LCS.


Subject(s)
Humans , Male , Middle Aged , Coronary Artery Bypass, Off-Pump/methods , Coronary Artery Disease , Mammary Arteries/transplantation , Saphenous Vein/transplantation , Coronary Angiography , Coronary Artery Disease/surgery
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