An organized coronary thrombus and cannabis-positive toxicology in the same autopsy do not, by themselves, establish that cannabis caused the thrombosis. A 2025 case report documented both findings in a 34-year-old man, while expressly concluding that a definitive causal relationship could not be established from the available postmortem evidence.
What the autopsy actually demonstrated
Aravind and colleagues described a man found unresponsive at home. The case presentation reported obesity and occasional marijuana and alcohol use. A complete autopsy found a 500 g heart with left-ventricular dilation and, microscopically, complete focal occlusion of the proximal left anterior descending coronary artery by an organized thrombus.
Trichrome staining showed fibroblastic growth within the thrombus. Elastic staining showed focal disruption of the internal elastic lamina. The authors interpreted the organization as supporting development during life, rather than a clot that appeared only after death.
That is evidence about the thrombus’s development, not specific evidence that THC initiated it. The remaining coronary arteries showed no atherosclerosis, thrombus or inflammatory infiltrates. No histological evidence of acute myocardial infarction was identified, although focal cardiac scarring was described.
What toxicology reported, and what it did not separate
Blood and vitreous were collected and analyzed by LC–MS. Table 1 reports 11-hydroxy-delta-9-THC at 3.3 ng/mL and delta-9-THC at 28 ng/mL. It also contains a combined label for delta-9-carboxy-THC and delta-9-THC with a value of 50 mg/mL, while its reference column uses ng/mL.
The abstract likewise prints 50 mg/mL. That figure and analyte label conflict with the table’s separate THC entry and surrounding unit convention. The publication does not provide enough clarification to silently change mg/mL to ng/mL or assign the 50 value to one specific analyte. Such a change would be a substantive correction, not ordinary formatting.
The table does not identify separate concentrations for blood and vitreous. It therefore cannot establish that each reported concentration was independently measured in both matrices, or supply a paired vitreous/blood ratio. The report also does not give an anatomical blood collection site, postmortem interval, detailed preservation history, calibration range, detection and quantitation limits or numerical assay precision.
Why two collected matrices do not resolve every uncertainty
The authors considered collection of blood and vitreous supportive of reliability. However, collecting two specimen types is not the same as publishing two matrix-specific, validated quantitative results. Without the missing details, the reader cannot determine how their values compared or which analytical uncertainties were assessed.
The table’s reference values likewise should not be treated as established thresholds for coronary thrombosis, impairment or death. This single case did not validate a diagnostic concentration for any of those outcomes.
Proposed mechanisms were not observed mechanisms
The discussion considered arteritis, vasospasm and platelet aggregation as possible pathways linking cannabis with cardiovascular injury. The authors explicitly distinguished those literature-based hypotheses from mechanisms demonstrated in this person. Vasospasm and cannabinoid-induced platelet activation were not directly measured.
Obesity, cardiomegaly and cardiac scarring also complicate attributing the outcome to one exposure. The report’s title uses causal language, but its discussion and conclusion retain uncertainty. An interpretation should preserve that qualification rather than citing the title as if causation had been experimentally established.
What conclusion can travel to another investigation?
The case illustrates the value of detailed histology when gross coronary examination lacks obvious atherosclerosis. It also illustrates why a measured exposure and a plausible biological mechanism are not sufficient to determine an individual’s causal pathway.
It cannot estimate the population risk of cannabis-related thrombosis, reconstruct dose or timing, establish behavioral impairment or distinguish how much a concentration changed after death. Those questions require evidence the case did not supply. The useful statement keeps the documented pathology, the cannabis findings, unresolved reporting details and the authors’ causal limitation together.
For another concentration-to-effect distinction, see THC in postmortem brain and impairment interpretation. Analytical uncertainty also differs from a negative result, as discussed in unquantifiable postmortem THC findings.
Primary source
Aravind A, Kyle PB, Subramony C. A Fatal Case of Coronary Thrombosis in a Young Male Triggered by Marijuana Use. Cureus. 2025;17(11):e98083. doi:10.7759/cureus.98083.
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