Pólipos gástricos: experiencia en el hospital Daniel Alcides Carrión - Callao 2014-2016 / Gastric polyps: experience in Daniel Alcides Carrion Hospital 2014-2016

Objetivos: El propósito de este estudio fue determinar la prevalencia y las características endoscópicas e histopatológicas de los distintos tipos de pólipos gástricos en el Hospital Daniel Alcides Carrión entre los años 2014-2016. Materiales y métodos: Se revisó 7559 reportes endoscópicos, donde se encontró 148 pólipos gástricos y se consignó datos de edad, sexo, localización, número de lesiones, tamaño, y aspectos macroscópicos y microscópicos de la lesión. Resultados: La prevalencia de pólipos gástricos fue 1,9%; el 74,3% de estos se presentaron en mujeres donde la edad promedio fue de 61,5 años. El 59,46% de los pólipos gástricos fueron únicos, la mayoría localizándose en el antro y cuerpo del estómago. El 74,29% de pólipos fueron menores de 1 cm en diámetro y el 83,64% tenían un aspecto macroscópico sésil. Con respecto al tipo histológico, se encontró que la mayoría de los pólipos gástricos en esta población son hiperplásicos (76,4%), seguidos por los de glándulas fúndicas (17,5%) y la minoría fueron adenomas (6,1%). Cabe resaltar que los pólipos múltiples fueron en su gran mayoría de tipo de glándulas fúndicas mientras que en los demás tipos histológicos predominó el pólipo único. Conclusión: La prevalencia de pólipos de glándulas fúndicas ha aumentado, mientras los otros tipos de pólipos han mantenido su prevalencia esperada.

Objective: The purpose of this study was to determine the prevalence of the different types of gastric polyps in the Daniel Alcides Carrión Hospital between the years of 2014 and 2016, and also define the endoscopic and histopathological characteristics of the lesions. Materials and methods: 7559 endoscopic reports were reviewed, in which 148 gastric polyps were found. The patients' age and sex as well as the localization, number, size and macroscopic and microscopic aspects of the polyps were recorded. Results: The prevalence of gastric polyps was 1.9%; 74.3% of these were found in women with an average age of 61.5 years. 59.4% of the gastric polyps found were singular, and the majority were located on the body and antrum of the stomach. 74.29% of the polyps were less than 1 cm in diameter and 83.64% of these were sessile when seen macroscopically. According to the histological type, it was found that the majority of gastric polyps were hyperplasic (76.4%), followed by fundic gland polyps (17.5%) and gastric adenomas (6.1%). It was also found that multiple gastric polyps were associated with fundic gland polyps while singular polyps were most likely hyperplastic or adenomas. Conclusion: The prevalence of fundic gland polyps has increased, while the other types of polyps have maintained their estimated prevalence.

Lesão de Dieulafoy do fundo gástrico / Dieulafoys lesion of the gastric fundus

Hemorragia digestiva alta (HDA) é uma emergência clínica exteriorizada através de melena, hematêmese, além de alterações hemodinâmicas decorrentes de perda volêmica. Existem vários diagnósticos etiológicos causadores de hemorragias digestivas altas; dentre eles, uma causa rara é lesão de Dieulafoy, sendo relacionada acerca de 2% dos casos de HDA. Neste relato, descreveremos um caso de lesão de Dieulafoy, evidenciando a relevância desta lesão como um importante diagnóstico diferencial nas causas de hemorragia digestiva alta. O procedimento diagnóstico e o manejo atual são fundamentados pela endoscopia digestiva alta. A hemostasia endoscópica é realizada, utilizando técnicas como eletrocoagulação, injeções com adrenalina e hemoclips.

Upper gastrointestinal bleeding (UGBI) is a clinical emergency externalized through melena, hematemesis and hemodynamic changes due to volume loss. There are a lot of etiological diagnosis of gastroduodenal hemorrhages, including Dieulafoy which is a rare cause related about 2% of the UGBI cases. In this report we describe a case of Dieulafoy lesion highlighting the importance of this lesion as a rare and important differential diagnosis in cases of upper gastrointestinal bleeding. The current diagnostic and management is justified by endoscopy. Endoscopic hemostasis is performed using techniques such as electrocoagulation, injections of adrenaline and hemo-clips.

Fundal Variant of Adenomyomatosis of the Gall Bladder: An Uncommon Entity.

Adenomyomatosis of the gallbladder is a benign and degenerative condition of the gallbladder. It is an incidental finding in gall bladder specimens resected for chronic cholecystitis or cholelithiasis. It frequently occurs after 3rd or 4th decade of life and is often an incidental finding in cholecystectomy specimens resected for chronic cholecystitis or cholelithiasis. Patients with adenomyomatosis are usually asymptomatic it can be classified into three types: Segmental, fundal and diffuse types. The fundal variant is uncommon compared to the other two types. Here, in we present a case of a fundal variant of adenomyomatosis of the gall bladder in a 65-year-old male patient.

Endoscopic Ultrasonographic Characteristics of Gastric Schwannoma Distinguished from Gastrointestinal Stromal Tumor / 대한소화기학회지

BACKGROUND/AIMS: Gastric schwannoma (GS), a rare neurogenic mesenchymal tumor, is usually benign, slow-growing, and asymptomatic. However, GS is often misdiagnosed as gastrointestinal stromal tumors (GIST) on endoscopic and radiological examinations. The purpose of this study was to evaluate EUS characteristics of GS distinguished from GIST. METHODS: A total of 119 gastric subepithelial lesions, including 31 GSs and 88 GISTs, who were histologically identified and underwent EUS, were enrolled in this study. We evaluated the EUS characteristics, including location, size, gross morphology, mucosal lesion, layer of origin, border, echogenic pattern, marginal halo, and presence of an internal echoic lesion by retrospective review of the medical records. RESULTS: GS patients comprised nine males and 22 females, indicating female predominance. In the gross morphology according to Yamada's classification, type I was predominant in GS and type III was predominant in GIST. In location, GSs were predominantly located in the gastric body and GISTs were predominantly located in the cardia or fundus. The frequency of 4th layer origin and isoechogenicity as compared to the echogenicity of proper muscle layer was significantly more common in GS than GIST. Although not statistically significant, marginal halo was more frequent in GS than GIST. The presence of an internal echoic lesion was significantly more common in GIST than GS. CONCLUSIONS: The EUS characteristics, including tumor location, gross morphology, layer of origin, echogenicity in comparison with the normal muscle layer, and presence of an internal echoic lesion may be useful in distinguishing between GS and GIST.

The morphological effects of asthma, as well as conventional and alternative asthma therapies on parietal and chief cells in the stomach of BALB/c Mice / Los efectos morfológicos del asma, así como de las terapias convencionales y alternativas del asma sobre las células parietales y principales en el estómago de ratones Balb/c

Scientific literature, although limited in this area, supports the hypothesis that asthma, by means of selective leukocyte trafficking between the various mucosal and glandular sites of the body, can have the same pathophysiological effects on the stomach as the airways. This study aimed to determine if asthma, in the absence and presence of various asthma therapies (Hydrocortisone and Modul8TM), imparted any morphological alteration on the stomach parietal and chief cells. The BALB/c murine asthmatic mouse model was the model of choice in this study. The asthma induction protocol as well as the asthma therapies were proved to be effective with the aid of bronchial lavage fluid leukocyte quantification. Fundic and pyloric biopsies were extracted at termination and assessed by means of transmission electron, scanning electron and light microscopy. The extracted fundic and pyloric biopsies revealed asthma alone induced parietal cell hypertrophy (increase in parietal cell size P < 0.000100 in both stomach regions) and chief cell hyper functioning. The use of Hydrocortisone and Modul8TM, as a therapy to correct the perceived gastric alterations were dismal; only in the case of fundic parietal cells were both treatments able to compensate for the hypertrophic effect caused by asthma, while in the pylorus parietal cell asthma- induced hypertrophy was only compensated for by Modul8TM.

La literatura científica, aunque limitada en esta área, apoya la hipótesis de que el asma, por medio del tráfico selectivo de leucocitos entre los diferentes sitios y la mucosa glandular del cuerpo, puede tener los mismos efectos fisiopatológicos en el estómago y las vías respiratorias. Este estudio tuvo como objetivo determinar si el asma, en ausencia y presencia de diversos tratamientos para el asma (hidrocortisona y Modul8 TM), generó alguna alteración morfológica en las céluals parietales y principales del estómago. El modelo murino BALB/c del ratón asmático fue el modelo de elección en este estudio. El protocolo de inducción de asma, así como el tratamiento del asma demostró ser eficaz con la ayuda de lavado bronquial y cuantificación leucocitaria del fluido. Biopsias de las regiones fúndica y pilórica fueron extraídas y evaluadas por medio de microscopía electrónica de transmisión, de barrido y de luz. Las biopsias extraídas de la región fúndica y pilórica revelaron que el asma solamente induce hipertrofia de las células parietales (aumento del tamaño de las células parietales P <0,00001 en ambas regiones del estómago) e hiperfuncionamiento de las células principales. El uso de hidrocortisona y Modul8 TM, como una terapia para corregir las alteraciones gástricas fue disimil, sólo en el caso de las células parietales fúndicas ambos tratamientos fueron capaces de compensar el efecto hipertrófico causado por el asma, mientras que en la célula parietal pílorica la hipertrofia inducida por el asma solamente se vio compensada por Modul8TM.

Gastric Fundic Gland Polyps and Their Relationship to Colorectal Neoplasia in Koreans: A 16-year Retrospective Study / 대한소화기학회지

BACKGROUND/AIMS: There is an ongoing debate on the relationship between gastric fundic gland polyps and increased incidence of colorectal neoplasia in Caucasians. However, there was no report on the relationship between gastric fundic gland polyp and colorectal neoplasia in Korea. The aim of this study was to identify the characteristics of gastric fundic gland polyps and whether a relationship exists between fundic gland polyps and colorectal neoplasia in Korean population. METHODS: Persons who underwent an esophagogastroduodenoscopy and colonoscopy from 1992 to 2007 at the Health Promotion Center of Incheon St. Mary's Hospital, The Catholic University of Korea were reviewed retrospectively. The relationship between gastric fundic gland polyps and colorectal neoplasia were analyzed. RESULTS: Among 22,451 subjects, fundic gland polyps were found in 328 subjects (1.5%). Fundic gland polyps were more common in women than in men (odds ratio of 6.25; 95% CI of 4.68-8.34). The odds ratios for colorectal neoplasia in all subjects with gastric fundic gland polyps were 0.56 (95% CI of 0.33-0.95) and men who were 50 years of age or older had an odds ratio of 2.81 (95% CI of 1.03-7.66) as compared to the control group. However, age and sex-adjusted odds ratios for all gastric fundic gland polyps were 0.73 (95% CI of 0.42-1.26), for men 1.78 (95% CI of 0.80-3.98), and for women 0.37 (95% CI of 0.16-0.87). CONCLUSIONS: Surveillance colonoscopy in patients with fundic gland polyps can be performed in the same manner as general population in Korea.

Spontaneous Resolution of Multiple Fundic Gland Polyps after Cessation of Treatment with Omeprazole / 대한소화기학회지

Fundic gland polyps (FGPs) are the most common type of gastric polyps, found primarily in the fundus and body of stomach. Long term use of proton pump inhibitor (PPI) is known to be associated with certain histological changes of the normal gastric mucosa including parietal cell hyperplasia and fundic gland cysts. We experienced a patient who showed spontaneous resolution of multiple FGPs after the cessation of omeprazole. Two years ago, the patient showed only endoscopically confirmed erosive esophagitis without FGPs. Multiple FGPs developed one year after the use of omeprazole and spontaneously disappeared with the cessation of omeprazole.

Acute gastric volvulus: a case report

This is a case report of a 16 year old male patient who presented to the emergency room of Aleppo University Hospital with the symptoms and signs of bowel obstruction. At exploratory laparatomy, gastric volvulus was found at the level of the pylorus with necrosis of the gastric fundus and the tail of pancreas

Efectividad de la gastrectomía total ampliada por cáncer de cardias y fondo del estómago / Effectivity of total extended gastrectomy due to cardia and fundus of the stomach cancer

Se presentan 18 pacientes tratados con gastrectomía total ampliada por presentar cáncer de cardias y fondo del estómago, en el Hospital Manuel Fajardo en el período de enero de 1995 a enero de 2003. Mostramos los resultados obtenidos con la gastrectomía total ampliada con respecto a la supervivencia y a la presencia de complicaciones, en especial las dehiscencias de anastomosis. El 88,8 por ciento de los pacientes era del sexo masculino y el 50 por ciento estaba en la sexta década de la vida. Todos eran fumadores. Las lesiones del tipo adenocarcinoma estaban localizadas en el cardias en el 34,5 por ciento de los casos, mientras en el resto se extendían al fondo del estómago (65,5por ciento). En el 78,8 por ciento la anastomosis fue manual; la técnica en Y de Roux se utilizó en el 44,5 por ciento y la anastomosis término-lateral con la modificación de Warren en el 55,5 por ciento. No ocurrieron dehiscencias. La mortalidad quirúrgica fue del 5,5 por ciento. La supervivencia a los 3 años fue del 33,3(AU)

18 patients treaties are presented with total gastrectomía enlarged to present cardias cancer and bottom of the stomach, in the Hospital Manuel Fajardo in the period of January of 1995 to January of 2003. We show the results obtained with the total gastrectomía enlarged with regard to the survival and to the presence of complications, especially the anastomosis dehiscencias. 88,8 percent of the patients was of the masculine sex and 50 percent it was in the sixth decade of the life. All were smoking. The lesions of the type adenocarcinoma were located in the cardias by 34,5 percent of the cases, while in the rest they extended to the bottom of the stomach (65,5 percent). By 78,8 percent the anastomosis was manual; the technique in AND of Roux it was used in 44,5 percent and the term-lateral anastomosis with the modification of Warren by 55,5 percent. They didn't happen dehiscencias. The surgical mortality was of 5,5 percent. The survival to the 3 years was of the 33,3(AU)

Difference in the distribution pattern of Helicobacter pylori and grade of gastritis in the antrum and in the body between duodenal ulcer and benign gastric ulcer patients

OBJECTIVES: To investigate the relationship between the Helicobacter pylori (H. pylori) colonization and the grade of gastritis in the antrum and in the body of patients with duodenal ulcer (DU) or benign gastric ulcer (BGU). METHODS: This study was performed in H. pylori-positive 220 DU patients and 180 BGU patients. H. pylori density was evaluated by modified Giemsa staining and CLO test, and gastritis grade was graded by H+ACY-E staining in the antrum and in the body. RESULTS: H. pylori grade by Giemsa staining was 1.24 in the antrum and 0.82 in the body for DU group (p +ADw- 0.01), and those of BGU group were slightly reversed, 0.83 and 0.87, respectively, but without statistical significance. Similarly H. pylori grade by CLO test was 3.1 in the antrum and 2.8 in the body for DU group (p +ADw- 0.01), and those of BGU group 2.3 and 2.6 (p +ADw- 0.05), respectively. In contrast, gastritis grade was 1.7 in the antrum and 1.2 in the body for DU group (p +ADw- 0.01), and those of BGU group 1.6 and 1.3 (p +ADw- 0.01), respectively, similar to those of DU. However, there was a correlation between H. pylori grade and gastritis grade in the antrum and in the body, not only in DU but also in BGU group (p +ADw- 0.01). CONCLUSION: In spite of different distribution patterns of H. pylori between DU group and BGU group, gastritis grade of the antrum was significantly higher than that of the body in both DU and BGU. However, gastritis is correlated with H. pylori density not only in DU but also in BGU patients. It looks like the inflammatory reaction to H. pylori is stronger in the antrum than in the body.

Hamartomatous gastric polyposis in a patient with tuberous sclerosis

A 42-year-old female diagnosed with tuberous sclerosis was found to have multiple polyps in the fundus of stomach. On histologic examination, the lesions were hamartomatous polyps. In tuberous sclerosis, many lesions occur in multiple organs and there are several reports about the frequent association of hamartomatous polyps of the colon. However, gastric manifestation of tuberous sclerosis has not been established probably due to its asymptomatic nature. This is the first report of multiple gastric hamartomatous polyposis in patient with tuberous sclerosis.

Hamartomatous gastric polyposis in a patient with tuberous sclerosis

A 42-year-old female diagnosed with tuberous sclerosis was found to have multiple polyps in the fundus of stomach. On histologic examination, the lesions were hamartomatous polyps. In tuberous sclerosis, many lesions occur in multiple organs and there are several reports about the frequent association of hamartomatous polyps of the colon. However, gastric manifestation of tuberous sclerosis has not been established probably due to its asymptomatic nature. This is the first report of multiple gastric hamartomatous polyposis in patient with tuberous sclerosis.

Prevalencia de mucosa cardial o fúndica y presencia de helicobacter pylori en la unión de mucosas escamoso-columnar en pacientes con reflujo gastroesofágico crónico patológico sin metaplasia intestinal comparados con controles / Prevalence of cardial or fundic mucosa and helicobacter pylorii infection in patients with chronic gastroesophageal reflux

Background: The mucosa distal to the endoscopic mucosal change zone can have easily diagnosed early alterations, in patients with chronic gastroesophageal reflux. Aim: To determine the type of mucosa existent in the zone distal to the squamous-columnar junction in patients with chronic gastroesophageal reflux without intestinal metaplasia. Patients and methods: One hundred thirty four controls and 208 patients with chronic gastroesophageal reflux lasting two years were studied. Forty three of these patients had a normal endoscopy, 54 had an erosive esophagitis and 111 had a short columnar epithelium covering the distal esophagus, without intestinal metaplasia. In all subjects, four biopsies were obtained from a zone distal to the squamous-columnar junction and two from the distal gastric antrum. Results: In 59 percent of control subjects, fundic mucosa was present in the zone distal to the squamous-columnar junction. Cardial mucosa was present in the rest. In patients with chronic gastroesophageal reflux, cardial mucosa was predominant. Helicobacter pylorii infection decreased along with increasing extension of cardial mucosa covering the distal esophagus. Conclusions: In patients with chronic gastroesophageal reflux there is a metaplasia of fundic mucosa towards cardial mucosa. On the other hand, Helicobacter pylorii infection decreases gradually

Effect of electrolytic lesion of the median raphe nucleus on behavioral and physiological measures of stress

The effect of electrolytic lesion of the median raphe nucleus was measured on behavioral and physiological parameters related to stress 24 h after the lesion. In of the elevated plus-maze the lesion decreased the percentage of open arm entries and tended to shorten the time spent on the open arms indicating as increase in anxiety. In contrast, the lesion markedly increased the time spent in the bright (aversive) compartment of the light-dark box and decrease in attempts to cross from the dark toward the bright compartment, an anxiolyic effect. With the exception of plasma prolactin level, which was lowered by the lesion, the physiological measures used in the present study indicate that the lesioned animals are under stress. Thus, death rate and weight loss after the surgery were higher in lesioned than in control animals. In addition, lesioned animals showed higher plasma corticoster- one levels, a high incidence of gastric ulcers in the fundus and a depressed immune response to the mitogen concavaline A. These results highlight the importance of the median raphe nucleus in the regulation of stress and anxiety. They also show that behavioral and physiological measures of stress may be dissociated.

Effect of cardamom oil on gastric secretions, gastric mucosa and induced contractions in rat stomach fundus

The aim of this work was to demonstrate the effect of cardamom oil on gastric secretions, gastric mucosa and induced contractionsin rat stomach fundus. This study was carried out on 40 rats divided into five groups each of 8 rats: Group 1: Control group. Group 2: Received a single dose of cardamom oil [5 ul Kg orally] Group 3: Received a single dose of cardamom oil [50 ul Kg orally] Group 4: Pretreated with cimetidine before cardamom administration. Group 5: Pretreated with atropine before cardamom oil. In all groups the gastric secretion was collected by pyloric ligation, for estimation of HCL concentration, mucin content and peptic activity. Furthermore. isolated stomach fundus strips were used for demonstration of cardamom oil effect on induced gastric contractions. The oil produced a dose dependent increase in both free and total gastric acidity as well as peptic activity. It also produced a slight increase in gastric mucin content. The oil at a dose of 5 ul/kg produced gastric hyperemia in 50% of rats, while a dose of 50 ul/kg produced mild gastric erosinos in 75% of the tested rats. Pretreatment with cimetidine [50 mg/kg] before administration of cardamom oil resulted in a significant reduction in both free and total gastric acidity as compared to that of the untreated animals. Moreover, pretreatment with atropine [1 mg/kg] before administration of cardamom Oil also produced a significant reduction in free and total gastric acidity as compared to that of the untreated animals. Additionally, the oil inhibited the histamine induced stomach fundus contractions on one hand and enhanced that induced by acetylcholine on the other. Cardamom oil has a stimulatory effect on gastric secretion

Body-fundic gastric ulcer and helicobacter pylory: muco-peptic cells expnsion (immature cells) in helicobacter pylori positive patients

It is generally agreed that Helicobacter pylori (Hp) plays a key role in alterating regulatory factors affecting cellular proliferation during the disease process. During chronic superficial gastritis there is, in case of moderate/severe activity, a foveolar-superficial expansion of immature muco-peptic cells. In the present experience this phenomenon has been evaluated in the surrounding areas of 22 body-fundic gastric ulcer (BFGU). The 72.7 percent of BFGU were Hp positive. The expansion was detectable in 68.7 percent of Hp positive BFGU. The expansion process involves the substitution of mature cells with immature one determining a reduction of the efficacy of the mucosa barrier in association with an increment of aggresive factors (mucosal pepsins). This phenomenon in relation with host genetic susceptibility may favor peptic ulcer.

Proximal versus distal carcinoma of the stomach. A clinicoendoscopic study.

During the period 1978 to 1988, 4619 upper gastrointestinal fibreoptic panendoscopies were carried out. There were 106 (2.2%) histologically confirmed cases of carcinoma of the stomach. The annual incidence was 9.6. The peak incidence was in the fifth decade. The mean age of these patients was 49.4 years and the male: female ratio was 3.6:1. The most frequent symptoms were weight loss (81%) and anorexia (72.9%). Dysphagia was present in 30% of patients. Thirty two percent of patients had proximal carcinoma, 63.2% had distal carcinoma and in 4.7% the whole stomach was involved. Patients with distal carcinoma had a longer history (P less than 0.01) and were more likely to present with weight loss (P less than 0.001), anorexia (P less than 0.005), abdominal pain (P less than 0.05) and abdominal lump (P less than 0.05), compared to proximal carcinomas. Dysphagia was, however, more likely to be present in patients with proximal carcinomas (P less than 0.001).

Comparación entre la prueba de la ureasa (CLOtest) y la histología en el diagnóstico del Campylobacter pylori / Comparison of urease test (CLOtest) and histology in the diagnosis of Campylobacter pylori

El campylobacter pylori ha sido implicado en la patogénesis de la úlcera péptica, dispepsia no ulcerosa y en la gastritis crónica. El C. pylori produce grandes cantidades de ureasa lo cual ha sido utilizado como base bioquímica para su identificación en pruebas diagnósticas rápidas y sencillas. En este estudio presentamos el uso de una prueba rápida de ureasa (CLOtest) en la detección del C. pylori. Estudiamos 46 pacientes consecutivos a los cuales se les practicó biopsia de mucosa gástrica en antro y fundus para estudio histológico y CLOtest. Todos los pacientes tuvieron gatritis crónica en histología. En 22 pacientes (48%) el C. pylori fue identificado por CLOtest y/o histología. En 18 pacientes (39%) el CLOtest fue positivo y en 16 pacientes (35%) la histología fue positiva. En 12 pacientes (26%) el C. pylori se evidenció por ambos métodos. No hubo diferencias en cuanto a la presencia del C. pylori en fundus y antro. Sin embargo, en 2 pacientes (4%) el C. pylori fue positivo en fundus y negativo en antro. En 9 pacientes (20%) el C. pylori fue positivo en antro y negativo en fundus. El CLOtest es una prueba sencilla rápida y sensible que permite al endoscopista diagnosticar la infección por C. pylori en la sala de endoscopia

Ulcera péptica antral postsección y reanastomosis antrofundica en la rata: puesta de manifiesto de un probable centro neuroendócrino antrofúndico / Post-seccional antral peptic ulcer and antrofundic re-anastomosis in rats: manifestation of a probable antrofundic neuroendocrine enter

La sección y reanastomosis antrofúndica (ARAF) desencadena, en ratas Wistar macho, verdaderas úlceras pépticas antrales. Se inician a los 20 días. Son de evolución progresiva, penetrando todas a las paredes gástricas. Entre los 7 y 8 meses involucran órganos vecinos (bazo, hígado, páncreas) y generan una gran reacción inflamatória de los ganglios peripancreáticos. La úlcera péptica antral se induce sea que se seccionen o no los nervios de la curvatura menor gástrica y se efectúe o no una piloroplastia concomitante. La hemisección gástrica, sea anterior o posterior, desencadena la úlcera péptica solamente en el mismo lado de la interrupción antrofúndica. En todas estas situaciones, salvo en los casos de piloroplastia concomitante, se comprueba un marcado y significativo incremento del índice gástrico (g/Kg) pero no del pancreático. En la serie de STAF con sección nerviosa en la curvatura menor y sin piloroplastia, el porcentaje de úlceras antrales pépticas es del 56%. Se postula la probable existencia, a nivel antrofúndico, de un centro neuroendócrino. Su anulación o pertubación por el procedimiento de sección y reanatomosis podría generar la úlcera antral y demás cambios histológicos (aumento de las células "G", hiperplasia de las células parietales y de las ECL y "A-like") por una o varias vías hipotéticas: 1. Acción directa, anulando la normal función bloqueadora de la somatostatina sobre las células "G" y/o célulkas parietales. 2. Pertubando o anulando el efecto de bomba motora del antro gástrico y, de esta manera, favoreciendo el reflujo duodenogástrico con todos los efectos deletéreos conocidos de la bilis en el antro, sobre todo en medio ácido. 3. Modificando en sentido inverso la sensibilidad, por un lado, de la masa de células "G" y, por el otro, de las células parietales, ECL y "A-like". La depresión de la sensibilidad fúndica induciría la hiperplasia de las células "G", la hipersecreción de gastrina y, a posteriori, todos los efectos secretorios y tróficos característicos de ésta...