Gastric hypersecretion syndrome
This is a typical disorder of gastric function characterized by an excessive increase in the amount of gastric juice produced. This process always occurs in combination with an increase in the acidity of the secretion and a sharp rise in its digestive capacity.
The main causes of hypersecretion include:
- Increase in the mass of gastric secretory cells (in most cases, this is a genetically determined feature of the organism).
- Activation of vagus nerve effects, which is often observed in various neurotic states and constitutional vagotonia.
- Increased gastrin synthesis and enhancement of its physiological effects.
- Hypertrophy or hyperplasia of enterochromaffin-like cells (enteroendocrine elements), which is a typical histological sign of hypertrophic gastritis.
- Overdistension of the antral part of the stomach by food masses.
- Iatrogenic factors: the action of certain drugs, in particular acetylsalicylic acid or glucocorticoids.
Pathological consequences of hypersecretion include a pronounced deceleration of food mass evacuation from the stomach. Aggressive acidic juice causes the appearance of erosions and ulcerations of the mucous membrane, which is clinically accompanied by heartburn. Gastroesophageal reflux also develops. Furthermore, excess acid provokes digestive disorders in the intestine, leading to the development of malabsorption syndrome.
Gastric hyposecretion
This typical secretion disorder manifests as a noticeable decrease in the volume of secreted juice combined with a reduction in its acidity and a drop in its digestive capacity.
Among the main causes of hyposecretion are:
- Decrease in the mass of secretory cells (observed in hypotrophic and atrophic forms of chronic gastritis, as well as in decaying gastric tumors).
- Decreased stimulating effects of the vagus nerve (characteristic of neuroses and constitutional sympathicotonia).
- Decreased gastrin production or blocking of its effects.
- Alimentary factors: pronounced deficiency of proteins and vitamins in the body.
- Action of drugs that reduce or completely eliminate the effects of the vagus nerve (e.g., cholinoceptor blockers or cholinesterase activators).
Gastric achylia: extreme degree of suppression
Gastric achylia is a typical secretory function disorder characterized by an insufficient amount or absolute complete absence of gastric juice (including hydrochloric acid, pepsin, and other essential components).
The etiology of achylia completely coincides with the causes of hyposecretion. The difference lies in the intensity of exposure: in achylia, pathogenic factors act much more strongly, causing deep suppression of the secretory function of the stomach.
The main pathological consequences of achylia include:
- Pathological acceleration of evacuation of the food bolus from the stomach.
- Secondary insufficiency of the exocrine function of the pancreas.
- Global digestive disorders in the intestinal lumen.
- Development of severe anemia (pernicious or iron-deficiency form develops).
- High risk of developing gastric cancer.
For quick memorization of the effect of secretion on motility, use the "Evacuation Traffic Light" rule. Hypersecretion is a "red light": food evacuation from the stomach slows down (the stomach processes food for a long time with excess acid). Achylia is a "green light": evacuation is pathologically accelerated (undigested food rapidly "drops" into the intestine since the stomach has nothing to process it with).
Class and exam questions
What is the fundamental difference between hyposecretion and achylia if the causes of their occurrence are the same?
The difference lies in the severity of the damaging factor. Hyposecretion is merely a decrease in juice volume and acidity. Achylia represents the extreme degree of functional suppression in which gastric juice, hydrochloric acid, and pepsin are completely absent or produced in critically insufficient quantities.
Why does malabsorption syndrome develop in gastric hypersecretion?
An excessive amount of gastric juice with high acidity and strong digestive capacity enters the intestine, where it disrupts normal cavity and membrane digestion processes. This naturally leads to a failure in nutrient absorption — malabsorption.
How can drugs affect the secretory function of the stomach?
Different groups of drugs act in opposite directions. For example, acetylsalicylic acid and glucocorticoids can provoke hypersecretion. At the same time, cholinoceptor blockers and cholinesterase activators eliminate the effects of the vagus nerve, leading to hyposecretion.
Why does anemia occur in achylia?
The complete absence of gastric juice, hydrochloric acid, and pepsin critically disrupts the assimilation of iron and vitamin B12 from food. As a result, the patient naturally develops iron-deficiency or pernicious (B12-deficiency) anemia.
What else to study on this topic
- Mechanisms of development of pernicious anemia against the background of gastric achylia
- Pathogenesis of gastroesophageal reflux in hypersecretion
- Effect of glucocorticoids and NSAIDs on the gastric mucosa
- Connection between atrophic gastritis, achylia, and the risk of gastric cancer
- The role of gastrin and enterochromaffin-like cells in the regulation of gastric secretion
Master the entire topic in the "Pathophysiology" course
This is a summary. The course covers everything tested in classes and exams.
- Complete study guide on "Gastric achylia and secretion changes" and another 4,913 pages of the subject
- Assignments and quizzes after every topic — just like in a colloquium
- AI tutor answers questions on the topic anytime
- 139 video lessons on the subject
Other topics in "Chapter 24. Typical Forms of Digestive System Pathology"
Free video lessons: pathophysiologyShort lessons with lecture notes — no registration required.
Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.