Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) AL amyloidosis ?
    ### Response:
    AL amyloidosisis the most common form of amyloidosis, a group of disorders in which an abnormal protein called amyloid builds up in tissues and organs. The signs and symptoms of AL amyloidosis vary among patients because the build up may occur in the tongue, intestines, muscles, joints, nerves, skin, ligaments, heart, liver, spleen, or kidneys.
    