Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Thrombotic Thrombocytopenic Purpura ?
    ### Response:
    Thrombotic thrombocytopenic purpura (TTP) is a rare blood disorder. In TTP, blood clots form in small blood vessels throughout the body.
                
The clots can limit or block the flow of oxygen-rich blood to the body's organs, such as the brain, kidneys, and heart.
    