Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Alstrm syndrome ?
    ### Response:
    Alstrm syndrome is a rare condition that affects many body systems. Many of the signs and symptoms of this condition begin in infancy or early childhood, although some appear later in life.  Alstrm syndrome is characterized by a progressive loss of vision and hearing, a form of heart disease that enlarges and weakens the heart muscle (dilated cardiomyopathy), obesity, type 2 diabetes mellitus (the most common form of diabetes), and short stature.
    