Definition

Hypervitaminosis A is the result of acute intoxication or chronic intoxication.

Symptoms

Acute poisoning by vitamin A that occurs in the adult results in the appearance:

• Stunning.
• Headaches.
• Vomiting.
• Desquamation of the skin that is a drop in tiny shreds of skin.

Acute poisoning in children results in the appearance possibly signs of rising pressure within the skull (intracranial hypertension) type of benign Hydrocephalus or Marie-Sée syndrome. This causes the projection of the large fontanelle and the child is of des. The evolution of this disease is benign. This acute poisoning in children occurs for doses above 300 000 international units.Chronic vitamin A in adult poisoning is the result of a prolonged ingestion of vitamin A to high doses. This is likely to lead to hypercalcemia (rise in the rate of calcium in the blood). In addition, osteoporosis that is a weakening of the fabric with pain and a risk of occurrence of fractures.L’intoxication chronique par la vitamine A chez l’enfant entraînant une hypervitaminose chronique, survient pour des doses supérieures à 100 000 unités internationales par jour pendant quelques mois. This leads to the appearance of headaches (headaches) due to intracranial hypertension. In addition, loss of appetite (anorexia) a fall in weight an embrittlement of nails which become a loss of hair brittle, eyebrows, a dry skin, and desquamation. Cracked lips and pain of the skeleton where joints and a rise in volume of the liver of the spleen (hepatosplenomegaly), appear.Hypervitaminosis A diagnosis is confirmed through the determination of vitamin A in the blood. This rate shows values greater than 100 µg per decilitre or if one prefers 3.49 micro-mole per litre.