Heroin inhalation-induced unilateral complete hippocampal stroke

Area of Science:

• Neurology
• Toxicology

Background:

• Acute drug abuse can lead to severe neurological complications.
• Heroin is typically associated with respiratory depression and overdose, but neurotoxic effects are less understood.

Observation:

• A 33-year-old man developed amnesia 48 hours after his first heroin inhalation.
• Clinical examination revealed lateral tongue biting and significant anterograde amnesia.
• Neuropsychological testing showed deficits in verbal and visual memory, indicating hippocampal dysfunction.

Findings:

• Brain magnetic resonance imaging (MRI) revealed cortical laminar necrosis (CLN) specifically affecting the left hippocampus.
• No vascular abnormalities were identified as the cause of the hippocampal damage.
• This represents the first documented case of complete hippocampal CLN following acute intranasal heroin abuse.

Implications:

• This case underscores the potential neurotoxic effects of intranasal heroin, particularly on the hippocampus.
• The specific MRI findings provide a distinct pattern for diagnosing heroin-induced neurological damage.
• Healthcare providers should be aware of these risks associated with heroin use, even via intranasal administration.