Chapter 24. Standard Pathological Forms of the Digestive System
23 topics with concise reviews: definitions, key facts, and class questions.
In this chapter, we examine how the complex conveyor belt of the gastrointestinal tract breaks down. We will trace the entire path of the food bolus, studying the pathogenesis of taste disorders, salivation (hypo- and hypersalivation), swallowing (dysphagia), and esophageal function using GERD as an example.
The section covers all key stages. You will find materials on disorders of gastric secretory and motor functions, including achylia, heartburn, nausea, vomiting, and dumping syndrome. Intestinal pathologies are analyzed in detail: digestion and absorption disorders, malabsorption syndrome, enteropathies, IBS, as well as chronic and ulcerative colitis. The final part of the chapter outlines the basic principles of therapy for these disorders.
Pay special attention: seminars and exams place the highest emphasis on the etiology, pathogenesis, and manifestations of peptic ulcer disease, mechanisms of malabsorption syndrome, and gastric achylia. Focus on cause-and-effect relationships—they form the clinical thinking necessary to understand gastroenterology.
What are the main groups into which the causes of digestive system diseases are divided?
In pathophysiology, all causes are divided into two large groups: factors that directly damage the digestive organs and factors that damage them indirectly.
How does renal failure harm the stomach and intestines?
In renal failure, the body tries to compensate for their function and begins to excrete urea and other metabolites through the gastrointestinal mucosa. This leads to its direct toxic damage.
How does parageusia fundamentally differ from dysgeusia?
In parageusia, the perception of ordinary substances is distorted (e.g., sweet tastes salty, and sour tastes bitter). In dysgeusia, taste preferences themselves are perverted: the patient begins to consume dangerous non-food items (sand, paper, feces) or spoiled products.
What is hyposalivation and what are its main manifestations?
This is a typical salivary disorder in which saliva production drops. Main manifestations include dry mouth (xerostomia), difficulty chewing and swallowing, and problems with food bolus formation.
How does hypersalivation affect the bactericidal activity of gastric juice?
Excess saliva dilutes and alkalinizes gastric juice, which suppresses its natural bactericidal and bacteriostatic capacity.
What is the difference between dysphagia and aphagia?
Dysphagia is difficulty swallowing, where the process is impaired but partially possible. Aphagia is the complete inability to swallow solid food or liquid.
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