Acute alcoholic hepatitis
During diagnostic workup, it is crucial for the clinician to specifically suspect alcohol abuse as the primary cause of inflammation.
From a pathogenetic standpoint, this disease follows a strict pattern: it almost never manifests in an intact (healthy) liver. The trigger for the acute inflammatory process is pre-existing long-term alcoholic damage to the liver tissue. As a rule, the morphological substrate preceding acute hepatitis is fatty degeneration (or steatosis).
Acute drug-induced hepatitis
Drug-induced hepatotoxicity is a frequent cause of acute non-viral injuries resulting from the intake of certain pharmacological agents. The clinical picture of such injury can completely mimic the classic course of acute hepatitis, including the appearance of pronounced jaundice and pruritus.
Depending on the nature of the damage, signs of either hepatocellular insufficiency or cholestasis syndrome may predominate. A critical distinguishing feature of drug-induced hepatitis is its frequent combination with systemic hypersensitivity reactions. These include:
- persistent fever;
- appearance of a polymorphic skin rash;
- joint pain (arthralgia);
- detection of eosinophilia in the complete blood count.
Main etiological factors:
- Antituberculosis drugs (e.g., isoniazid).
- Antibacterial agents (specifically, nitrouran derivatives).
- Hormonal medications (oral contraceptives, methyltestosterone).
- Various hypoglycemic agents.
Acute hepatitis of toxic etiology
This group includes chemical liver injuries caused by non-medicinal poisons. Clinically, they present with a florid and extremely severe picture of acute poisoning.
Key toxic agents:
- Industrial chemical poisons (a typical representative is carbon tetrachloride).
- Heavy metal salts.
- Specific mushroom toxins (e.g., phalloidin, found in the death cap).
Features of disease outcome: From a clinical and prognostic perspective, there is one crucial point. If the patient survives the severe acute toxic stage of poisoning, the inflammatory process in the liver in the vast majority of cases does not become chronic (i.e., it does not transition into a long-term chronic form, unlike many viral infections).
Briefly: answers to topical questions
Which biochemical markers confirm hepatocellular insufficiency syndrome in acute hepatitis?
The biochemical markers of hepatocellular insufficiency syndrome in acute hepatitis are indicators of impaired synthetic liver function:
- Albumin — decrease in serum level.
- Prothrombin / prothrombin index — decrease in prothrombin level or prothrombin index.
Which laboratory parameters are characteristic of cholestasis syndrome in drug-induced liver injury?
If drug-induced liver injury presents with cholestasis syndrome, the characteristic laboratory findings are:
- Alkaline phosphatase — increased activity; in cholestasis, it rises more significantly than transaminases.
- Gamma-glutamyl transferase (GGT) — increased activity.
- Conjugated / direct bilirubin — sharp increase in level.
What specific mechanism underlies hepatocyte damage upon exposure to carbon tetrachloride?
The mechanism of hepatocyte damage upon exposure to carbon tetrachloride is based on direct toxic injury. This industrial poison causes acute toxic hepatitis with massive necrosis. The mechanisms of damage include:
- Direct damage — direct destruction of cells by the xenobiotic.
- Metabolic disorders — profound disruption of intracellular lipid metabolism.
As a result of these processes in acute massive injury, microvesicular fatty degeneration develops at the periphery of the liver lobules.
What is the pathogenesis of fatty liver disease in chronic alcohol abuse?
The pathogenesis of fatty liver disease in chronic ethanol abuse is caused by an imbalance between the influx, synthesis, and utilization of lipids. The process includes the following links:
- Enhanced mobilization of fat from depots.
- Increased synthesis of fatty acids directly within hepatocytes.
- Enhanced esterification of fatty acids to triglycerides.
- Decreased fatty acid oxidation (reduced utilization in the liver).
- Decreased lipoprotein synthesis and impaired release from the cell.
- Increased cell membrane permeability due to enhanced cholesterol synthesis.
To memorize the frequent drug groups causing acute drug-induced hepatitis, use the mnemonic rule "AHBA": Antituberculosis, Hormonal, Bacterial (antibacterial), Antidiabetic (hypoglycemic).
Class and exam questions
Against the background of which condition does acute alcoholic hepatitis most commonly develop?
It almost never occurs in a healthy liver. The process develops against the background of long-standing alcoholic damage, specifically fatty degeneration (steatosis).
What are the systemic manifestations of acute drug-induced hepatitis?
The injury is often accompanied by hypersensitivity reactions: fever, polymorphic rash, joint pain (arthralgia), and eosinophilia.
Can acute toxic hepatitis progress to a chronic form?
Generally no. An important prognostic point is that if the patient survives the acute stage of poisoning, the disease does not become chronic.
What else to study on this topic
- Pathogenesis of fatty degeneration (steatosis) in alcohol abuse
- Mechanisms of hepatocellular insufficiency in drug-induced hepatotoxicity
- Differential diagnosis of cholestasis syndrome in acute hepatitis
- Clinical features of phalloidin (death cap) poisoning
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