A young man developed delayed brain hemorrhage days after synthetic cannabis use | Research

The takeaway

A 25-year-old man presented with lung bleeding and agitation after synthetic cannabinoid use, initially recovered, then developed delayed intracerebral hemorrhage days later requiring prolonged ICU care.

Emergency physicians, neurologists, and critical care teams managing synthetic cannabinoid toxicity.

Delayed brain hemorrhage

What the researchers found

The patient initially presented with dyspnea, hemoptysis, and agitation after synthetic cannabinoid ("Bonsai") use. Initial brain CT was normal, but the patient developed delayed intracerebral hemorrhage in two locations (left frontal and right posterior parietal) during hospitalization. The delayed onset suggests SC-induced vascular damage or coagulopathy rather than direct acute injury.

Why it matters

The delayed onset of brain hemorrhage after an initially normal CT scan is a critical clinical warning. Patients who appear to improve after synthetic cannabinoid exposure may still be at risk for life-threatening intracranial complications.

The numbers in context

25-year-old male. Initial CT normal. Diffuse alveolar hemorrhage on thoracic CT. Patient regained consciousness on day 2, then lost consciousness again. Hemorrhage found in left frontal and right posterior parietal regions. Recovery took 3 weeks after second intubation.

How the study worked

Single case report with serial CT imaging documenting the progression from initial normal brain imaging to delayed bilateral intracerebral hemorrhage following synthetic cannabinoid use.

What this study cannot tell us

Single case report. Specific synthetic cannabinoid compound not identified. Other contributing factors (e.g., pre-existing vascular abnormalities) could not be fully excluded. The temporal relationship suggests but does not prove causation.

How to read the evidence

Rated preliminary because this is a single case report.

When this study was published

Published in 2019.

The bigger picture

This case adds to the evidence that synthetic cannabinoids can cause bleeding in multiple organs, from lungs to brain, and that complications can be delayed. The mechanism may involve SC effects on coagulation or vascular integrity.

Questions still open

What is the mechanism of delayed intracranial hemorrhage after SC use? Should patients with SC-related pulmonary hemorrhage receive serial brain imaging? How common are delayed vascular complications?

Common questions

Can synthetic cannabinoids cause brain hemorrhage?

This case documents delayed intracerebral hemorrhage after synthetic cannabinoid use. The patient initially appeared to improve before developing brain bleeding in two locations.

Why was the bleeding delayed?

The exact mechanism is unclear. The patient also had lung bleeding (diffuse alveolar hemorrhage), suggesting the synthetic cannabinoid may have caused widespread vascular damage or coagulopathy that took time to manifest in the brain.

Read the original research

Delayed Intracerebral Hemorrhage after Synthetic Cannabis (Bonsai) Abuse; Case Report and Literature Review.

Bulletin of emergency and trauma, 7(3), 330-334

View on PubMed ↗Publisher’s paper ↗

Citation

Aydin, Gülçin; Bakar, Bülent. (2019). Delayed Intracerebral Hemorrhage after Synthetic Cannabis (Bonsai) Abuse; Case Report and Literature Review.. Bulletin of emergency and trauma, 7(3), 330-334. https://doi.org/10.29252/beat-0703019