A condition caused by a brief whole body exposure to more than one sievert dose equivalent of radiation. Acute radiation syndrome is initially characterized by ANOREXIA; NAUSEA; VOMITING; but can progress to hematological, gastrointestinal, neurological, pulmonary, and other major organ dysfunction.

Synonyms: Radiation Syndrome, Acute Acute Radiation Syndromes Radiation Syndromes, Acute Acute Radiation Syndrome