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Videos de Conceptos Relacionados

Gastritis-I: Introduction and Types01:27

Gastritis-I: Introduction and Types

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Gastritis, defined by the inflammation or irritation of the stomach lining or gastric mucosa, manifests in several distinct forms: acute, chronic, reactive, and a specific subtype known as autoimmune metaplastic atrophic gastritis.
Acute gastritis presents as a sudden inflammation triggered by various stressors to the stomach lining, such as exposure to corrosive agents, local irritants like aspirin and other NSAIDs, alcohol consumption, radiation therapy, physical trauma, severe burns, sepsis,...
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Gastritis III: Clinical Manifestations and Management01:23

Gastritis III: Clinical Manifestations and Management

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The clinical manifestations of gastritis can vary depending on the cause and type of gastritis, but some common symptoms may include the following.
Clinical manifestations of acute gastritis
The patient with acute gastritis may have a rapid onset of symptoms, such as epigastric pain or discomfort, dyspepsia, anorexia, hiccups, or nausea and vomiting, which can last from a few hours to a few days. Erosive or hemorrhagic gastritis may cause bleeding, which may manifest as blood in vomit or as...
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Peptic Ulcer01:27

Peptic Ulcer

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Peptic ulcers are erosive lesions of the gastric or duodenal lining, most commonly caused by Helicobacter pylori infection. This Gram-negative, helical bacterium has adapted to survive the stomach’s acidic environment by producing urease, which converts urea into ammonia and carbon dioxide. The ammonia neutralizes gastric acid in the bacterium’s immediate environment, allowing colonization of the gastric mucosa. H. pylori attaches to mucus-secreting epithelial cells, penetrates the...
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Gastritis-II: Pathophysiology01:17

Gastritis-II: Pathophysiology

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Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
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Barrett Esophagus-I: Introduction01:21

Barrett Esophagus-I: Introduction

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Barrett's esophagus is a medical condition where the esophageal mucosa is significantly damaged by stomach acid or other digestive fluids, often due to long-term exposure associated with gastroesophageal reflux disease (GERD). In GERD, a weakened or abnormally relaxed lower esophageal sphincter allows stomach acid to flow persistently into the esophagus.
This constant acid exposure transforms the esophagus's pink mucosal lining (stratified squamous epithelium) into a type of lining more...
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Gastric Phase of Digestion01:26

Gastric Phase of Digestion

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The gastric phase of digestion begins as soon as food enters the stomach. The incoming food bolus triggers neural and hormonal mechanisms, which last approximately 3 to 4 hours. During this phase, the stomach undergoes significant changes to prepare the food for further digestion and absorption.
When food enters the stomach, it stretches the stomach walls and activates stretch receptors. This triggers local reflexes of the enteric nervous system, mediated through the myenteric plexus. These...
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Video Experimental Relacionado

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Author Spotlight: Genetic Profiling for Fluorouracil Response in Gastric Cancer
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Author Spotlight: Genetic Profiling for Fluorouracil Response in Gastric Cancer

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Cáncer gástrico

Eric Van Cutsem1, Xavier Sagaert2, Baki Topal3

  • 1Department of Gastroenterology/Digestive Oncology, University Hospitals Gasthuisberg Leuven and KU Leuven, Leuven, Belgium.

Lancet (London, England)
|May 10, 2016
PubMed
Resumen

Este seminario analiza el cáncer gástrico, una de las principales causas de muerte por cáncer. Abarca las causas, la clasificación, el diagnóstico y el tratamiento, incluida la cirugía y las terapias específicas para la enfermedad avanzada.

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Área de la Ciencia:

  • En el campo de la oncología
  • Gastroenterología

Sus antecedentes:

  • El cáncer gástrico es una de las principales causas de mortalidad por cáncer a nivel mundial.
  • Muchos pacientes presentan una enfermedad inoperable o recurrente.
  • El cáncer gástrico se clasifica anatómicamente e histológicamente, lo que requiere un manejo multidisciplinario de expertos.

Objetivo del estudio:

  • Para proporcionar una visión actualizada del cáncer gástrico.
  • Para discutir las causas, la clasificación, el diagnóstico y las estrategias de tratamiento.
  • Para destacar los avances en las terapias dirigidas.

Principales métodos:

  • Revisión de la literatura y las prácticas clínicas actuales.
  • Análisis de los datos epidemiológicos y los resultados del tratamiento.
  • Integración de enfoques multidisciplinarios en el cuidado del paciente.

Principales resultados:

  • La cirugía sigue siendo la única opción curativa.
  • Las terapias adyuvantes/neoadyuvantes son cruciales para la enfermedad localmente avanzada.
  • Las terapias dirigidas como trastuzumab y ramucirumab ofrecen mejores resultados para el cáncer gástrico metastásico.

Conclusiones:

  • El tratamiento del cáncer gástrico requiere un enfoque integral y multidisciplinario.
  • El diagnóstico precoz y la selección del tratamiento adecuado son fundamentales.
  • La investigación en curso y las terapias dirigidas están mejorando las tasas de supervivencia de los pacientes.