A common virus can suddenly trigger blood clots in every major artery at the same time.
April 20, 2026
Original Paper
Cytomegalovirus-Associated Multifocal Arterial Thromboembolism and Encephalitis in an Immunocompetent Patient: A Case Report and Review of the Literature
SSRN · 6601284
The Takeaway
Cytomegalovirus is a member of the herpes family that stays dormant in most people without causing any symptoms. A rare case has surfaced where the virus triggered a catastrophic series of blood clots and brain inflammation in a patient with a perfectly healthy immune system. Clots formed at the same time in the heart, kidneys, spleen, and legs, leading to a total vascular crisis. This event proves that even harmless viruses can behave like aggressive killers under the right circumstances. Doctors may need to consider viral testing for unexplained blood clots even when the patient seems to have a strong immune response. The line between a dormant infection and a fatal disease is thinner than we assume.
From the abstract
IntroductionCytomegalovirus (CMV) infection is generally self-limited in immunocompetent adults. Arterial thromboembolic complications are exceedingly rare and represent fewer than five of the ~113 cases of CMV-associated thrombosis documented in the world literature.Case PresentationA 47-year-old immunocompetent diabetic woman developed simultaneous thromboses of the coronary, bilateral renal, splenic, iliac, and popliteal arteries, bilateral sylvian ischemic strokes, and CMV encephalitis confi