A 51-year-old man arrived at a Portuguese hospital on Halloween night after a week of fever, poor appetite, and worsening shortness of breath. His condition quickly slid into septic shock, and he needed a ventilator and medications to support his heart's pumping. When doctors looked at his heart with ultrasound, they found something that fit the date a little too well: a large, mobile clump of infected tissue on his mitral valve that looked like a ghost.
Cardiologists in Guimarães and heart surgeons in Porto described the case in a report titled "Ghostly intrusion on a frightful Halloween night" in the peer-reviewed journal Monaldi Archives for Chest Disease. The report first appeared online in January 2025 and was later included in the journal's March 2026 issue. With Halloween approaching again, the image is the eye-catching part. The story beneath it is far more serious, and it reflects a problem that U.S. hospitals have been confronting for years.
