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Revista Medica De Chile | 2001

Pesquisa poblacional de cáncer gástrico en pacientes sintomáticos digestivos, período 1996-2000

Alfonso Calvo B; Martha Pruyas A; Eva Nilsen V; Patricia Verdugo L

Background: Gastric cancer is the first cause of death due to malignant tumors in Chile. Its mortality rates have stabilized in the last two decades and its prognosis is closely associated to the degree of tumor invasion at the moment of surgery. Aim: To study the frequency of gastric cancer among symptomatic patients subjected to an upper gastrointestinal endoscopy at a secondary care health center. Patients and methods: All upper gastrointestinal endoscopies performed to patients derived from public primary care clinics were recorded. Results: In the study period, 4,145 endoscopies were done to 818 men and 2,128 women. Seventy one percent of patients were aged over 40 years of age. Fifty one carcinomas and one lymphoma were detected. Of these, 10 tumors were incipient. Thirty one patients were operated on and in 22 a total gastrectomy was performed. One patient, that required an esophageal resection, died. Conclusions: Gastric cancer was detected in 1.2% of symptomatic adult patients subjected to an upper gastrointestinal endoscopy (Rev Med Chile 2001; 129: 749-55)


Revista Medica De Chile | 2010

[Helicobacter pylori infection in symptomatic patients with benign gastroduodenal diseases: analysis of 5.664 cases].

Juan Pablo Ortega; Alberto Espino; Alfonso Calvo B; Patricia Verdugo; Martha Pruyas; Eva Nilsen V; Luis Villarroel; Oslando Padilla; Arnoldo Riquelme; Antonio Rollán

UNLABELLED Infection with Helicobacter pylori (H. pylori) is highly prevalent in Chile, but there are no systematic studies in patients with upper gastrointestinal symptoms. AIM To determine the prevalence of H. pylori infection, according to age, gender and endoscopic pathology in a large sample of patients. METHODS We studied 7,893 symptomatic patients submitted to upper gastrointestinal endoscopy between July 1996 and December 2003 in the context of a screening program of gastric cancer in a high risk population. H. pylori infection was determined by rapid urease test (RUT) in antral mucosa. We excluded 158 patients with gastric cancer (2%) and 2,071 patients without RUT. RESULTS We included 5,664 patients, mean age 50.7 +/- 13.9 years, women 72.1%. Endoscopic diagnoses were normal in 59.3%, erosive esophagitis in 20%, gastric ulcer (GU) in 8.1%, duodenal ulcer (DU) in 6.4%, and erosive gastropathy in 6.2%. RUT was positive in 78% of patients. After adjusting for age and sex and with respect to patients with normal endoscopy, frequency of H. pylori infection was 86.6% in DU (OR 2.1, 95% CI 1.5-2.8, p < 0.001); 81.4% in GU (OR 1.8, 95% CI 1.4-2.4; p < 0.001 ); 79.9% in erosive gastropathy (OR 1.4, 95% CI 1.03-1.8; p = 0.03) and 77.4% in erosive esophagitis (OR 1.1, 95% CI: 0.9-1.3; p = NS). The probability of H. pylori infection decreased significantly with age, more markedly in men with normal endoscopy. CONCLUSIONS Prevalence of H. pylori infection is very high in symptomatic Chilean patients and even higher in those with gastroduodenal ulcer or erosions, while in patients with erosive esophagitis is similar to those with normal endoscopy. The frequency of infection decreases with age, probably as a consequence of rising frequency of gastric mucosal atrophy.


Revista Chilena De Cirugia | 2009

Resultados perioperatorios y sobrevida alejada de la pancreatoduodenectomía con resección vascular

Enrique Norero M; Sergio Báez V; Eduardo Viñuela F; Cristian Martínez B; Julio Reyes R; Rodrigo Kusanovic B.; Marcel Sanhueza G; Gloria Aguayo B; Alfonso Calvo B; Rose Marie Mege R.; Mario Caracci L.; Alfonso Díaz F

Introduccion: La pancreatoduodenectomia (PDD) con reseccion vascular (RV) cuando existe invasion de la vena porta o mesenterica superior (VP-VMS) es controversial. Objetivo: Evaluar los resultados del perioperatorio y la sobrevida alejada de los pacientes sometidos a esta tecnica. Material y Metodo: Estudio retrospectivo que incluyo a los pacientes con un tumor periampular en quienes se realizo una PDD con RV entre 1990 y 2008. Se compararon los resultados del perioperatorio y de sobrevida alejada con el grupo sometido a una PDD sin RV durante el mismo periodo. Se comparo tambien la sobrevida con los pacientes no resecados. Resultados: Se realizaron 188 PDD, en 8 (4%) de estos pacientes se realizo PDD con RV (Edad: 58 ± 14 anos, Hombres: 4). La morbilidad postoperatoria para la PDD con y sin RV fue de 75% y 59% (p = ns). La mortalidad postoperatoria para los grupos con y sin RV fue de 0% y 8% (p = ns). En 6 de los 8 pacientes el diagnostico fue cancer de pancreas y en 4 se confirmo histopatologicamente la invasion de VP-VMS. La sobrevida del grupo con y sin RV no tuvo diferencia significativa (medianas 25 y 16 meses; p = ns). La sobrevida de los pacientes sometidos a una PDD con RV fue superior a los pacientes no resecados (medianas 25 y 3 meses; p = 0,0001). Conclusiones: La PDD con RV obtiene resultados perioperatorios y de sobrevida alejada comparables a una PDD sin RV. La sobrevida alcanzada con esta tecnica es ampliamente superior a la de los pacientes no resecados.


Revista Chilena De Cirugia | 2008

Gastrectomía laparoscópica en cancer gástrico

Alex Escalona P; Sergio Báez V; Fernando Pimentel M; Alfonso Calvo B; Camilo Boza W; Eduardo Viñuela F; Alfonso Díaz F; Gustavo Pérez B.; Sergio Guzmán B.; Luis Ibáñez A.

Introduccion: La cirugia laparoscopica ha sido incorporada como una alternativa de tratamiento curativo en cancer gastrico. El objetivo de este estudio es evaluar los resultados quirurgicos inmediatos de pacientes sometidos a gastrectomia laparoscopica por cancer gastrico incipiente e intermedio en el Hospital Clinico de la Pontificia Universidad Catolica de Chile y en el Hospital Dr. Sotero del Rio. Material y metodo: Se incluyen todos los pacientes sometidos a gastrectomia laparoscopica por cancer gastrico incipiente e intermedio (T1 - T2) en ambas instituciones. Resultados: Desde Mayo de 2005 a Diciembre del 2006, 13 pacientes fueron sometidos a gastrectomia laparoscopica, 9 hombres (70 %). Edad promedio 62+ 12 anos. El tiempo operatorio promedio fue 293 + 51 minutos, la estadia hospitalaria 7,3 + 2,8 dias. No hubo complicaciones quirurgicas. El promedio de ganglios resecados fue de 27 + 18. De acuerdo a la clasificacion TNM-AJCC, 9 pacientes se encontraban en etapa IA y 4 en etapa IB. Discusion: La gastrectomia laparoscopica es una alternativa segura en el tratamiento quirurgico del cancer gastrico incipiente e intermedio


Revista Chilena De Cirugia | 1997

Evolución epidemiológica reciente del cáncer gástrico en Chile y el mundo

Iván Serra Canales; Sergio Báez V.; Jaime Serra C.; Alfonso Calvo B; Emilio Decinti Ferreira


Revista Chilena De Cirugia | 1996

Cáncer vesicular: estudio de casos y controles en Chile

Iván Serra Canales; Sergio Báez V.; Kazuo Endoh; Masaharu Yamamoto; Alfonso Calvo B; Emilio Decinti Ferreira; Hidenobu Watanabe; Kazuo Tajima; Ramona Norambuena A.


Revista Chilena De Cirugia | 1992

Factores ambientales y clínicos asociados al cáncer biliar en Chile: estudio preliminar de 165 casos

Iván Serra Canales; Alfonso Calvo B; Sergio Báez V.; Emilio Decinti F.


Archive | 2008

Gastrectoma laparoscpica en cancer gstrico

Alex Escalona P; Sergio Báez V; Fernando Pimentel M; Alfonso Calvo B; Camilo Boza W; Eduardo Viñuela F; Alfonso Díaz F; Gustavo Pérez B.; Sergio Guzmán B.; Luis Ibáñez A.


Revista Medica De Chile | 2001

Pesquisa poblacional de cncer gstrico en pacientes sintomticos digestivos, perodo 1996-2000

Alfonso Calvo B; Martha Pruyas A; Eva Nilsen V; Patricia Verdugo L


Revista Medica De Chile | 1998

Anomalías cromosómicas y citometría de flujo en adenocarcinoma de vesícula biliar

Patricia Sanz Contreras; Alfonso Calvo B; Lorena Tobella P.; Samuel Salazar C.; Vera Daher N.; Silvia Castillo Taucher; Eva Nielsen V.; Gladys Smok S.; Attila Csendes Juhasz; Iván Serra Canales

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Alfonso Díaz F

Pontifical Catholic University of Chile

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Eduardo Viñuela F

Pontifical Catholic University of Chile

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Sergio Báez V

Pontifical Catholic University of Chile

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Alex Escalona P

Pontifical Catholic University of Chile

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Camilo Boza W

Pontifical Catholic University of Chile

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Fernando Pimentel M

Pontifical Catholic University of Chile

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Gustavo Pérez B.

Pontifical Catholic University of Chile

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Luis Ibáñez A.

Pontifical Catholic University of Chile

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Sergio Guzmán B.

Pontifical Catholic University of Chile

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Alberto Espino

Pontifical Catholic University of Chile

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