Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Bjrnstad syndrome ?
    ### Response:
    Bjrnstad syndrome is a rare disorder characterized by abnormal hair and hearing problems. Affected individuals have a condition known as pili torti, which means "twisted hair," so named because the strands appear twisted when viewed under a microscope. The hair is brittle and breaks easily, leading to short hair that grows slowly.
    