Below is an instruction from Human. Write a response.
    ### Instruction:
    Is idiopathic inflammatory myopathy inherited ?
    ### Response:
    Most cases of idiopathic inflammatory myopathy are sporadic, which means they occur in people with no history of the disorder in their family. However, several people with idiopathic inflammatory myopathy have had close relatives with autoimmune disorders. Autoimmune diseases occur when the immune system malfunctions and attacks the body's tissues and organs.
    