Unveiling the Rare Presentation of Acetylsalicylate Overdose: Grand Round.

Background: This case report highlights a rare occurrence of aspirin overdose presenting only as severe coagulopathy.

Case presentation: An 85-year-old woman was admitted to the hospital with multiple lumbar vertebral compression fractures causing severe back pain. The patient had self-medicated with excessive consumption of Bufferin A containing 330 mg of aspirin. On arrival, she showed no typical symptoms of salicylate toxicity, such as nausea, vomiting, hyperventilation, tinnitus, or hearing loss. However, blood work revealed a significant decrease in vitamin K-dependent coagulation factors leading to coagulopathy. The administration of 20-mg menatetrenone (vitamin K) resulted in rapid improvement in coagulation abnormalities. The patient's blood salicylate level was later determined to be 42.7 mg/dL.

Discussion: Acute salicylate poisoning is known to cause coagulopathy because of the inhibition of vitamin K-dependent coagulation factors. However, this case is unique because it demonstrates coagulopathy as the sole manifestation of aspirin toxicity without any other symptoms.

Conclusions: This case highlights the importance of considering the possibility of aspirin toxicity in patients with coagulopathy, especially those who are regularly consuming aspirin.