Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Hyperparathyroidism-jaw tumor syndrome ?
    ### Response:
    Hyperparathyroidism-jaw tumor syndrome is an inherited condition characterized by overactivity of the parathyroid glands (hyperparathyroidism), which regulate the body's use of calcium. In people with this condition, hyperparathyroidism is caused by benign tumors (adenomas) that form in the parathyroid glands.
    