Two cases of acute pulmonary artery embolism triggered by fresh and chronic mixed-vein thrombosis with a "Blowfish sign"

Ultrasonography and computed tomography of the lower extremities revealed fresh and chronic mixed-vein thrombosis (FCMVTs) presenting the "Blowfish sign, " accompanied by pulmonary embolism. FCMVTs presenting the "Blowfish sign " may increase the risk of fatal pulmonary embolism, and its detection by ultrasonography is important for preventing pulmonary embolism.