Medico-legal aspects of fatal ricin poisoning: a systematic review of clinical manifestations, toxicological findings and autopsy results.
Isabella Aquila, Matteo Antonio Sacco
✦ AI-curated · Sources linked
In 30 seconds
This PRISMA-guided systematic review synthesized original studies, case reports, and case series describing fatal or near-fatal human ricin exposure. It summarized clinical progression, toxicological biomarkers, autopsy findings, and medico-legal issues. Cases commonly progressed from nonspecific gastrointestinal symptoms to hypovolemic shock, multi-organ failure, and refractory cardiovascular collapse. Ricinine was consistently detected in blood, urine, and postmortem tissues, supporting its use as a biomarker of exposure; however, the evidence did not establish reliable links between ricinine findings and poisoning severity or toxicokinetics.
Key findings
- Reported illness often progressed from mild gastrointestinal symptoms to hypovolemic shock, multi-organ failure, and refractory cardiovascular collapse.
- Ricinine was consistently detected in blood, urine, and postmortem tissues, but severity and toxicokinetic correlations remain unestablished.
- Common autopsy findings included gastrointestinal hemorrhagic necrosis, hemolysis, hepatic injury, renal tubular necrosis, and evidence of capillary leak.
Why it matters
The review brings together clinical, toxicological, and pathological features that may help identify suspected fatal ricin poisoning, including cases without a known exposure history. It also highlights interpretive challenges relevant to forensic assessment, such as postmortem redistribution and distinguishing lethal from non-lethal exposure, while underscoring gaps in biomarker interpretation.
What to keep in mind
The review reports that available evidence is insufficient to establish definitive correlations between ricinine findings and poisoning severity or toxicokinetics.