Thrombosis

(throm-BOE-suss) A blood clot: A mass of blood that forms when platelets stick together. Harmful blood clots are more likely to happen in PNH. The term thrombus describes a blood clot that develops and attaches to a blood vessel. The term embolus describes a blood clot or other foreign matter that gets into the bloodstream and… (thrombus) that develops and attaches to a blood vessel.

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